New Circuits Page 79
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This simple AVR Programmer will allow you to transfer hex programs to most ATMEL AVR microcontrollers without sacrificing your budget and time. It is more reliable than most other simple AVR programmers available out there and can be built in very short....
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An audio cross-over network is used inside a speaker to separate or filter audio signals of different frequencies to different speakers within a speaker cabinet designed to handle those frequencies. This particular crossover network uses two passive....
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It is good idea to put this circuit in a box and mark/write each LED with number 1 to 6. Now, when switch S1 is pushed momentarily, any one of the 6 LEDs will glow. The Number marked for glowing LED becomes dice`s output. Every time S1 is released, new LED....
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The following circuit shows about PC Adapter 12V Circuit Diagram. Features: a current limiting circuit is connected in series with the12V supply, ....
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This Instructable describes the installation of a SPY5000 two way motorcycle alarm with a Honda 1998 CB250 Nighthawk motorcycle. This Alarm is rat....
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The schematic above illustrates dividing a crystal oscillator signal by the crystal frequency to obtain an accurate (0. 01%) 1 second time base. Two cascaded 12 stage counters (CD4040) form a 24 stage binary counter and the appropriate bits are gated....
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The Kenwood TM-733A is an older dual-band mobile radio. This radio is capable of 50 watts transmit on VHF, 35 watts on UHF, full-duplex crossband repeat, and simultaneous receive on two VHF or UHF frequencies. It does have a problem, however: It is terribly....
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Hi folks, Hi slayer. this graph from Joseph Newman`s book should explain some things, though the energy increase is probably from other additional....
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This small amplifier is constructed around the TDA2003 IC, capable of delivering 4Wrms at 4ohms. The TDA 2003 has improved performance with the same pin configuration as the TDA 2002. The additional features of TDA 2002, very low number of external....
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This application note discusses the application of Avago Technologies` MGA-675T6 for 5-6 GHz application. The MGA-675T6 is integrated internally with shutdown and biasing circuitry. Besides reducing the complexity of the external circuitry, the shutdown....
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Car audio amplifier schematic diagram. Given the voltage of the car is +12 V, we have the opportunity to take power over a threshold. The solution is to use two amplifiers in bridge connection, so the output quadrupled, at least theoretically, and at best,....
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This is basically a crystal radio with an audio amplifier which is fairly sensitive and receives several strong stations in the Los Angeles area with a minimal 15 foot antenna. Longer antennas will provide a stronger signal but the selectivity will be worse....
-
Hello, I`m planning to design a circuit for a DC Motor with these parts: 1* 7805 2 * 2N2955 (paralleling two transistors to increase current) plus....
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This circuit enables any infrared (IR) remote control to control the outputs of a 4017 decade counter. It`s quite simple really and uses a 3-terminal IR receiver (IRD1) to pick up infrared signals from the transmitter. IRD1`s output is then coupled to NPN....
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This is circuit that can be used to strengthen the RF signals from a television antenna work at UHF frequencies in the range 450-800MHz. It has a gain of around 10dB and is suitable for boosting weak TV signals The tuned circuit comprising the 15nH inductor....
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This project uses a widely available IRF510 MOSFET. This N-Channel enhancement mode silicon gate power field effect transistor is an advanced power MOSFET designed, tested, and guaranteed to withstand a specified level of energy in the breakdown avalanche....
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The IC is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal PLL demodulator for positive and negative modulation, including sound AM and FM processing. A special function is implemented for the demodulation of FM radio signals....
-
The circuit shown here is a simple Static 0-9 Display can be used in many applications. The circuit is based on 7490 asynchronous decade counter (IC2), a 7-segment display (D1), and a seven-segment decoder / driver IC 7446 (IC1). The seven-segment display....
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6V to 12V DC converter circuits that can be used to convert a small voltage of about 6 volts to a higher voltage of 12 volts but ofcourse with a lower current rating. This inverter circuit can provide up to 800mA of 12V power from a 6V supply. For example,....
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The design presented here is a little bit unusual in its arrangement, but offers some advantages over the usual designs that I will explain in the following paragraphs. First, let`s start from the basics: A linear power supply has a transformer that steps....
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IC H Bridge DC motor driver L298 has two H-Bridge circuit in it, so it can be used to download the drive two DC motors. H Bridge DC motor driver L298 each can deliver currents up to 2A. However, in use, the H Bridge DC motor driver L298 can be used in....
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The mains supply can be conveniently reduced with no heat dissipation by the reactance of C1; then rectified by D1 (1N4007) and D2 (1N4007) and clamped to 24V....
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This circuit confuses the infra-red receiver in a TV. It produces a constant signal that interferes with the signal from a remote control and prevents the TV detecting a channel-change or any other command. This allows you to watch your own program without....
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This is of course the simplest electronic code lock circuit one can make. The circuit uses one transistor, a relay and few passive components. The simplicity does not have any influence on the performance and this circuit works really fine. The circuit is....
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DC to AC inverter`s function is to convert Direct Current (DC) voltage to Alternating Current (AC) voltage. DC to AC inverter is commonly used for converting High Voltage DC (HVDC) transmission voltage back to AC, and for converting the DC output voltage of....
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Embedded I/O board provides isolated high voltage switch inputs and eight high current high voltage DC outputs using optically isolated, open drain N-MOSFET transistors as solid state relays (SSR) for controlling resistive or inductive loads, including....
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We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon. ..
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The amplifiers of a LM3900N device can be conveniently used to make a mixer unit for audio purposes; the unit enables three separate audio signals to be mixed together to produce a composite output. The audio mixer circuit shown provides this facility using....
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Here`s a single chip FM transmitter circuit using Maxim semiconductors IC MAX2606. The MAX2606 is a compact, high-performance intermediate frequency VCO specially designed for wireless communication circuits. They have monolithic construction with low-noise....
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There was a discussion on synth-diy a while ago about the problems of building a voltage controlled oscillator with a sawtooth wave output whose duty cycle (the ratio of ramp-up time to ramp-down time) is adjustable with a seperate control voltage. [Don:....
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The resolution of the barometric pressure is about 0. 00417 inHg (0. 0139 kPa) for a pressure range of 31. 0 to 28. 0 inHg (105. 0 to 95. 0 kPa, or 1050 to 950 mb or hPa). Better resolutions are possible with a more restricted pressure range. The circuit....
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The STI5189 uses state of the art process technology to provide an ultra low cost, full featured, SD set-top box SOC. It is a highly integrated solution combining QPSK demodulation, Audio Video decoding and applications processing into a single chip,....
-
This circuit will supply up to about 20ma at 12 volts. It uses capacitive reactance instead of resistance; and it doesn t generate very much heat.The circ....
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This is danger beep circuit. It use 555 integrated number circuits build to are a stable mutivibrator that be valuable duty cycle 5% driver loudspeaker....
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Most, if not all, recent cars have an impressive amount of electronics, whether it be ABS brake systems, engine control with injection calculators, airbag activation, or other various functions, called comfort functions. Among them is one which we tend to....
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LDO regulators- basic theory, circuit schematic, practical LDO regulator circuit using LM2941 5 to 20V adjustable o/p ,1A output current....
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This is a good Electronic project report on Speed Control of DC Motor using Microcontroller by using PWM. In this system, a micro controller is interfaced with a LCD, Keypad and DC motor driver. The Micro controller is used for controlling the DC motor by....
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A class-A audio amplifier is pretty wasteful of power but when plenty of power is available the simplicity is attractive. Here is a simple darlington transistor example intended for use with a 5 volt power supply. This circuit and the following aren`t for....
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7208 seven metric system counter is used for frequency meter, it has latch and multiplexing function, and contains direct drive circuit and display driver circuit. 7207IC is divided the output frequencyof6. 5536 MHz crystal oscillator by2 12which produces....
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FM Booster, Active FM Antenna Amplifier This FM booster that can be used to listen to programmes from distant FM stations clearly. The circuit comprises a common-emitter tuned RF preamplifier wired around VHF/UHF transistor 2SC2570. (Only C....
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MC44BS373CA: PLL Tuned UHF and VHF Audio Video High Integration Modulator MC44BS373CA The MC44BS373CA Audio and Video Modulator is for use in VCRs, set-top boxes, and similar devices. By Freescale Semiconductor, Inc ..
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The PBL3717A motor stepper driveris a monolithic IC which controls and drives one phase of a bipolar stepper motor with chopper control of the phase current. Current levels may be selected in three steps by means of two logic inputs which select one of three....
-
The Vinculum board is controlled using DOS commands and so every time you send a command if the command is executed successfully the board sends a D:> response that indicates its ready for the next command. If you try and send commands faster than the....
-
This circuit is a simple approach for converting a loud speaker into a microphone. When the sound waves fall on the diaphragm of a speaker, there will be fluctuations in the coil and there will be a small proportional induced voltage. Usually this induced....
-
Improving the Canon 5D Mark II audio so that it can produce usable production audio. The first part of any engineering effort is data gathering, so I set about to measure the input frequency response of the 5D. My end goal was to use the Marantz PMD661 field....
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Assembly is very straight forward, just follow the PC board overlay. Make sure you get the integrated circuit and the electrolytic capacitors the correct way around. The electrolytic capacitors are polarized, they have a + or - marked on them and they must....
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Pinout Of The Fa-6 - posted in General Discussion: Hello I am new at this Forum and hope that I will do nothing wrong. My question is how to connect aTape Recorder with ""line in"", ""line out"" and ""remote"" to my new FA-6. On the FA-6 is a 8 Din plug but....
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The Astable multivibrator circuit has no stable state. With no external signal applied, the internal transistors alternately switch from cutoff to saturation at a frequency determined by the RC time constants of the coupling circuits. So an Astable....
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Control monitoring equipment at a TV repeater site. It had to accept commands sent as DTMF tones over the repeaters audio channel and be able to switch either AV signals or power supply feeds at currents up to 1 Amp. The switching requirements left no option....
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This circuit is also called as Free Running Oscillator. Because, it doesn`t requires any trigger pulse to get active. Consider the instant at which Vc=+Vsat. Now the capacitor charges exponentially towards +Vsat through R. Automatically, Vd increases and....
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The basic Geiger counter circuit is identical to the previous circuit. The revision is the adding of the components for our three optional enhancements; external power input, headphone jack and digital output, boxed in red. External Power – The external....
-
-
We present a simple and high-throughput microfluidic system for diffusion-based monolayer yeast cell culture monitoring. The technique takes advantage of gas solubility and elasticity of PDMS. Yeast cells are patterned into the micro-cavity array with a....
-
An NE555 timer IC connected as shown here can detect a missing pulse or abnormally long period between two consecutive pulses in a train of pulses. Such circuits can be used to detect the intermittent firing of the spark plug of an automobile or to monitor....
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transistors as a darlington pair. The circuit is also using a thermistor to detect or sense the heat. A 12K variable resistor is used to adjust the activation of the buzzer on the desired temperature. Working of the circuit is simple when the thermistor will....
-
In this self-explanatory schematic you can see decoupling capacitor on the right, which must be as close to microcontroller`s power pins as possible; crystal oscillator, which is optional, because you can use internal RC oscillator or external clock signal,....
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-
There are various approaches to analog synthesizer building, luckily they don`t vary too much in terms of the applied building blocks. The main building blocks are: oscilator (VCO), filter(VCF), variable gain amplifier (VCA), envelope generator (EG), and....
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Electromagnetic radiation is used in communication. You are more familiar with radiowaves, microwaves, and TV signals. Visible light is also electromagnetic radiation and can be used to transmit a signal. It is a whole new technology called fiber optics. A....
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-
-
Intercom walkie talkie are the next logical step in this discussion. They show how a crystal oscillator can be used to transmit voice. Transmitting a voice via a crystal locked oscillator is not easy. This is because the crystal is locking the frequency and....
-
Note the incoming ac routed to the primary terminals on a 12. 6-volt transformer. The hot side of the ac is connected through a fuse and a single-pole single-throw (SPST) toggle switch. With the switch in the OFF (open) position, the transformer receives....
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Using a modified version of the last program, we can control as many servomotors as we have I/O lines on port B. In the next listing, we will control two servos in the same manner as we controlled a single servo in the previous program. The circuit is shown....
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This diagram shows how an internal SoftV92 Data Fax Modem interacts with phone line. The modem is from Zoltrix but a Conexant utility says it is a "Churchill Data Modem". This schematic may be useful to fix a similar modem...
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Solar battery charger schematic & description. This solar battery charger circuit can charge 12v lead acid battery or sla battery. ....
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Many SWR / Power meter used by amateurs to the extent reasonably accurate continuous average power with a CW key-down signal, but can not reliably be used with other (modulated) signals PEP or average power measurement. These laws seek to show why the power....
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Battery Charger using Solar & Electrical Power with circuit diagram. This Dual Power Source battery charger can utilize two power sources to charge a Lead Acid battery ..
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A circuit that uses both positive and negative alternations in an alternating current to produce direct current. There are two types of Full-Wave Rectifier circuits; one that only uses two diodes but requires a center tapped transformer [shown below], and....
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As per a recent study conducted by a US Government agency, Induction cooking is the most energy efficient cooking method compared to electrical heaters, gas and microwave ovens. There are other new cooking methods such as Halogen Cooking, find our article on....
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Figure (a) is the infrared emission circuit that composed of 12 the keyboard and S2559. Figure (b)shows DTMF decoder circuit and channel control circuit composedof the MT8870. Figure (c) is the voltage amplifier circuit composed of two-op ampLM358....
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I decided to throw together a schematic of how the OEM AUX switch should be wired, and print it so that when I install the wiring I would have a handy reference. Figured I would post it. Here is another breakdown of the switch pins, keeping in mind that....
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This circuit is intended for children fun, and is suitable to be installed on bicycles, battery powered cars and motorcycles, but also in models and other games....
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Are you not familiar with the basics of electronics We have just opened an online store where 4 very good books on basic electronics have been kept for sale. You can read the reviews of these books and buy them as you wish. These books are being followed by....
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The Muntz one-tube design can be considerably improved by adding an audio preamplifier stage. This will give improved sensitivity, and thus give full modulation with lower-level signal sources (such as some older CD players, ceramic phono cartridge, etc. ).....
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This project based on Atmel AT89C52 and Dallas real-timeclock (RTC) chip DS12887 can be used to control and remotely program the switching operation of 24 electrically operated devices. The devices can be switched on/off at precise times repeatedly every....
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AC mains operated single LED flasher circuit, built using the popular CMOS timer chip TLC555 is shown below. The whole circuit is powered directly by the grid supply of 230VAC through a capacitive potential divider and associated components....
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This is the low cost AVR programmer using attiny2313. The schematic diagram is given below.
First setup the circuit as shown. One important care taken to make fuse bit
avrdude -c usbasp -p t2313 -U hfuse:w:0xdf:m -U lfuse:w:0xef:m
If you use serial port....
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The Spartan-3 board has Traffic light controller with FPGA I/O pins (details tabulated below). Traffic light controller card consist of 12 Nos. point led arranged by 4Lanes. Each lane has Go (Green), Listen(Yellow) and Stop(Red) LED is being placed. Each LED....
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Autonomous vehicles are already in use in many manufacturing facilities, and they are also sold as toys. Perhaps one day, the world`s highways will be filled with cars requiring no user intervention. While we are not there yet, and may never get there, an....
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In conventional triangular-wave oscillators, hysteresis from positive feedback in the Schmitt trigger determines the voltage levels and amplitude of the triangular waves. With this topology, it`s difficult to independently vary the voltage levels and....
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This amplifier is the outdoor type, line installed outdoors, the amp`s main line; Figure 2 is the indoor power line box. Indoor and outdoor use between 50 ohm or 75 ohm coaxial cable to connect. e› 3 Figure 3, Figure 4 is the amplifier circuit board, and....
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This simple AVR Programmer will allow you to transfer hex programs to most ATMEL AVR microcontrollers without sacrificing your budget and time. It is more reliable than most other simple AVR programmers available out there and can be built in very short....
An audio cross-over network is used inside a speaker to separate or filter audio signals of different frequencies to different speakers within a speaker cabinet designed to handle those frequencies. This particular crossover network uses two passive....
It is good idea to put this circuit in a box and mark/write each LED with number 1 to 6. Now, when switch S1 is pushed momentarily, any one of the 6 LEDs will glow. The Number marked for glowing LED becomes dice`s output. Every time S1 is released, new LED....
The following circuit shows about PC Adapter 12V Circuit Diagram. Features: a current limiting circuit is connected in series with the12V supply, ....
This Instructable describes the installation of a SPY5000 two way motorcycle alarm with a Honda 1998 CB250 Nighthawk motorcycle. This Alarm is rat....
The schematic above illustrates dividing a crystal oscillator signal by the crystal frequency to obtain an accurate (0. 01%) 1 second time base. Two cascaded 12 stage counters (CD4040) form a 24 stage binary counter and the appropriate bits are gated....
The Kenwood TM-733A is an older dual-band mobile radio. This radio is capable of 50 watts transmit on VHF, 35 watts on UHF, full-duplex crossband repeat, and simultaneous receive on two VHF or UHF frequencies. It does have a problem, however: It is terribly....
Hi folks, Hi slayer. this graph from Joseph Newman`s book should explain some things, though the energy increase is probably from other additional....
This small amplifier is constructed around the TDA2003 IC, capable of delivering 4Wrms at 4ohms. The TDA 2003 has improved performance with the same pin configuration as the TDA 2002. The additional features of TDA 2002, very low number of external....
This application note discusses the application of Avago Technologies` MGA-675T6 for 5-6 GHz application. The MGA-675T6 is integrated internally with shutdown and biasing circuitry. Besides reducing the complexity of the external circuitry, the shutdown....
Car audio amplifier schematic diagram. Given the voltage of the car is +12 V, we have the opportunity to take power over a threshold. The solution is to use two amplifiers in bridge connection, so the output quadrupled, at least theoretically, and at best,....
This is basically a crystal radio with an audio amplifier which is fairly sensitive and receives several strong stations in the Los Angeles area with a minimal 15 foot antenna. Longer antennas will provide a stronger signal but the selectivity will be worse....
Hello, I`m planning to design a circuit for a DC Motor with these parts: 1* 7805 2 * 2N2955 (paralleling two transistors to increase current) plus....
This circuit enables any infrared (IR) remote control to control the outputs of a 4017 decade counter. It`s quite simple really and uses a 3-terminal IR receiver (IRD1) to pick up infrared signals from the transmitter. IRD1`s output is then coupled to NPN....
This is circuit that can be used to strengthen the RF signals from a television antenna work at UHF frequencies in the range 450-800MHz. It has a gain of around 10dB and is suitable for boosting weak TV signals The tuned circuit comprising the 15nH inductor....
This project uses a widely available IRF510 MOSFET. This N-Channel enhancement mode silicon gate power field effect transistor is an advanced power MOSFET designed, tested, and guaranteed to withstand a specified level of energy in the breakdown avalanche....
The IC is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal PLL demodulator for positive and negative modulation, including sound AM and FM processing. A special function is implemented for the demodulation of FM radio signals....
The circuit shown here is a simple Static 0-9 Display can be used in many applications. The circuit is based on 7490 asynchronous decade counter (IC2), a 7-segment display (D1), and a seven-segment decoder / driver IC 7446 (IC1). The seven-segment display....
6V to 12V DC converter circuits that can be used to convert a small voltage of about 6 volts to a higher voltage of 12 volts but ofcourse with a lower current rating. This inverter circuit can provide up to 800mA of 12V power from a 6V supply. For example,....
The design presented here is a little bit unusual in its arrangement, but offers some advantages over the usual designs that I will explain in the following paragraphs. First, let`s start from the basics: A linear power supply has a transformer that steps....
IC H Bridge DC motor driver L298 has two H-Bridge circuit in it, so it can be used to download the drive two DC motors. H Bridge DC motor driver L298 each can deliver currents up to 2A. However, in use, the H Bridge DC motor driver L298 can be used in....
The mains supply can be conveniently reduced with no heat dissipation by the reactance of C1; then rectified by D1 (1N4007) and D2 (1N4007) and clamped to 24V....
This circuit confuses the infra-red receiver in a TV. It produces a constant signal that interferes with the signal from a remote control and prevents the TV detecting a channel-change or any other command. This allows you to watch your own program without....
This is of course the simplest electronic code lock circuit one can make. The circuit uses one transistor, a relay and few passive components. The simplicity does not have any influence on the performance and this circuit works really fine. The circuit is....
DC to AC inverter`s function is to convert Direct Current (DC) voltage to Alternating Current (AC) voltage. DC to AC inverter is commonly used for converting High Voltage DC (HVDC) transmission voltage back to AC, and for converting the DC output voltage of....
Embedded I/O board provides isolated high voltage switch inputs and eight high current high voltage DC outputs using optically isolated, open drain N-MOSFET transistors as solid state relays (SSR) for controlling resistive or inductive loads, including....
We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon. ..
The amplifiers of a LM3900N device can be conveniently used to make a mixer unit for audio purposes; the unit enables three separate audio signals to be mixed together to produce a composite output. The audio mixer circuit shown provides this facility using....
Here`s a single chip FM transmitter circuit using Maxim semiconductors IC MAX2606. The MAX2606 is a compact, high-performance intermediate frequency VCO specially designed for wireless communication circuits. They have monolithic construction with low-noise....
There was a discussion on synth-diy a while ago about the problems of building a voltage controlled oscillator with a sawtooth wave output whose duty cycle (the ratio of ramp-up time to ramp-down time) is adjustable with a seperate control voltage. [Don:....
The resolution of the barometric pressure is about 0. 00417 inHg (0. 0139 kPa) for a pressure range of 31. 0 to 28. 0 inHg (105. 0 to 95. 0 kPa, or 1050 to 950 mb or hPa). Better resolutions are possible with a more restricted pressure range. The circuit....
The STI5189 uses state of the art process technology to provide an ultra low cost, full featured, SD set-top box SOC. It is a highly integrated solution combining QPSK demodulation, Audio Video decoding and applications processing into a single chip,....
This circuit will supply up to about 20ma at 12 volts. It uses capacitive reactance instead of resistance; and it doesn t generate very much heat.The circ....
This is danger beep circuit. It use 555 integrated number circuits build to are a stable mutivibrator that be valuable duty cycle 5% driver loudspeaker....
Most, if not all, recent cars have an impressive amount of electronics, whether it be ABS brake systems, engine control with injection calculators, airbag activation, or other various functions, called comfort functions. Among them is one which we tend to....
LDO regulators- basic theory, circuit schematic, practical LDO regulator circuit using LM2941 5 to 20V adjustable o/p ,1A output current....
This is a good Electronic project report on Speed Control of DC Motor using Microcontroller by using PWM. In this system, a micro controller is interfaced with a LCD, Keypad and DC motor driver. The Micro controller is used for controlling the DC motor by....
A class-A audio amplifier is pretty wasteful of power but when plenty of power is available the simplicity is attractive. Here is a simple darlington transistor example intended for use with a 5 volt power supply. This circuit and the following aren`t for....
7208 seven metric system counter is used for frequency meter, it has latch and multiplexing function, and contains direct drive circuit and display driver circuit. 7207IC is divided the output frequencyof6. 5536 MHz crystal oscillator by2 12which produces....
FM Booster, Active FM Antenna Amplifier This FM booster that can be used to listen to programmes from distant FM stations clearly. The circuit comprises a common-emitter tuned RF preamplifier wired around VHF/UHF transistor 2SC2570. (Only C....
MC44BS373CA: PLL Tuned UHF and VHF Audio Video High Integration Modulator MC44BS373CA The MC44BS373CA Audio and Video Modulator is for use in VCRs, set-top boxes, and similar devices. By Freescale Semiconductor, Inc ..
The PBL3717A motor stepper driveris a monolithic IC which controls and drives one phase of a bipolar stepper motor with chopper control of the phase current. Current levels may be selected in three steps by means of two logic inputs which select one of three....
The Vinculum board is controlled using DOS commands and so every time you send a command if the command is executed successfully the board sends a D:> response that indicates its ready for the next command. If you try and send commands faster than the....
This circuit is a simple approach for converting a loud speaker into a microphone. When the sound waves fall on the diaphragm of a speaker, there will be fluctuations in the coil and there will be a small proportional induced voltage. Usually this induced....
Improving the Canon 5D Mark II audio so that it can produce usable production audio. The first part of any engineering effort is data gathering, so I set about to measure the input frequency response of the 5D. My end goal was to use the Marantz PMD661 field....
Assembly is very straight forward, just follow the PC board overlay. Make sure you get the integrated circuit and the electrolytic capacitors the correct way around. The electrolytic capacitors are polarized, they have a + or - marked on them and they must....
Pinout Of The Fa-6 - posted in General Discussion: Hello I am new at this Forum and hope that I will do nothing wrong. My question is how to connect aTape Recorder with ""line in"", ""line out"" and ""remote"" to my new FA-6. On the FA-6 is a 8 Din plug but....
The Astable multivibrator circuit has no stable state. With no external signal applied, the internal transistors alternately switch from cutoff to saturation at a frequency determined by the RC time constants of the coupling circuits. So an Astable....
Control monitoring equipment at a TV repeater site. It had to accept commands sent as DTMF tones over the repeaters audio channel and be able to switch either AV signals or power supply feeds at currents up to 1 Amp. The switching requirements left no option....
This circuit is also called as Free Running Oscillator. Because, it doesn`t requires any trigger pulse to get active. Consider the instant at which Vc=+Vsat. Now the capacitor charges exponentially towards +Vsat through R. Automatically, Vd increases and....
The basic Geiger counter circuit is identical to the previous circuit. The revision is the adding of the components for our three optional enhancements; external power input, headphone jack and digital output, boxed in red. External Power – The external....
We present a simple and high-throughput microfluidic system for diffusion-based monolayer yeast cell culture monitoring. The technique takes advantage of gas solubility and elasticity of PDMS. Yeast cells are patterned into the micro-cavity array with a....
An NE555 timer IC connected as shown here can detect a missing pulse or abnormally long period between two consecutive pulses in a train of pulses. Such circuits can be used to detect the intermittent firing of the spark plug of an automobile or to monitor....
transistors as a darlington pair. The circuit is also using a thermistor to detect or sense the heat. A 12K variable resistor is used to adjust the activation of the buzzer on the desired temperature. Working of the circuit is simple when the thermistor will....
In this self-explanatory schematic you can see decoupling capacitor on the right, which must be as close to microcontroller`s power pins as possible; crystal oscillator, which is optional, because you can use internal RC oscillator or external clock signal,....
There are various approaches to analog synthesizer building, luckily they don`t vary too much in terms of the applied building blocks. The main building blocks are: oscilator (VCO), filter(VCF), variable gain amplifier (VCA), envelope generator (EG), and....
Electromagnetic radiation is used in communication. You are more familiar with radiowaves, microwaves, and TV signals. Visible light is also electromagnetic radiation and can be used to transmit a signal. It is a whole new technology called fiber optics. A....
Intercom walkie talkie are the next logical step in this discussion. They show how a crystal oscillator can be used to transmit voice. Transmitting a voice via a crystal locked oscillator is not easy. This is because the crystal is locking the frequency and....
Note the incoming ac routed to the primary terminals on a 12. 6-volt transformer. The hot side of the ac is connected through a fuse and a single-pole single-throw (SPST) toggle switch. With the switch in the OFF (open) position, the transformer receives....
Using a modified version of the last program, we can control as many servomotors as we have I/O lines on port B. In the next listing, we will control two servos in the same manner as we controlled a single servo in the previous program. The circuit is shown....
This diagram shows how an internal SoftV92 Data Fax Modem interacts with phone line. The modem is from Zoltrix but a Conexant utility says it is a "Churchill Data Modem". This schematic may be useful to fix a similar modem...
Solar battery charger schematic & description. This solar battery charger circuit can charge 12v lead acid battery or sla battery. ....
Many SWR / Power meter used by amateurs to the extent reasonably accurate continuous average power with a CW key-down signal, but can not reliably be used with other (modulated) signals PEP or average power measurement. These laws seek to show why the power....
Battery Charger using Solar & Electrical Power with circuit diagram. This Dual Power Source battery charger can utilize two power sources to charge a Lead Acid battery ..
A circuit that uses both positive and negative alternations in an alternating current to produce direct current. There are two types of Full-Wave Rectifier circuits; one that only uses two diodes but requires a center tapped transformer [shown below], and....
As per a recent study conducted by a US Government agency, Induction cooking is the most energy efficient cooking method compared to electrical heaters, gas and microwave ovens. There are other new cooking methods such as Halogen Cooking, find our article on....
Figure (a) is the infrared emission circuit that composed of 12 the keyboard and S2559. Figure (b)shows DTMF decoder circuit and channel control circuit composedof the MT8870. Figure (c) is the voltage amplifier circuit composed of two-op ampLM358....
I decided to throw together a schematic of how the OEM AUX switch should be wired, and print it so that when I install the wiring I would have a handy reference. Figured I would post it. Here is another breakdown of the switch pins, keeping in mind that....
This circuit is intended for children fun, and is suitable to be installed on bicycles, battery powered cars and motorcycles, but also in models and other games....
Are you not familiar with the basics of electronics We have just opened an online store where 4 very good books on basic electronics have been kept for sale. You can read the reviews of these books and buy them as you wish. These books are being followed by....
The Muntz one-tube design can be considerably improved by adding an audio preamplifier stage. This will give improved sensitivity, and thus give full modulation with lower-level signal sources (such as some older CD players, ceramic phono cartridge, etc. ).....
This project based on Atmel AT89C52 and Dallas real-timeclock (RTC) chip DS12887 can be used to control and remotely program the switching operation of 24 electrically operated devices. The devices can be switched on/off at precise times repeatedly every....
AC mains operated single LED flasher circuit, built using the popular CMOS timer chip TLC555 is shown below. The whole circuit is powered directly by the grid supply of 230VAC through a capacitive potential divider and associated components....
This is the low cost AVR programmer using attiny2313. The schematic diagram is given below. First setup the circuit as shown. One important care taken to make fuse bit avrdude -c usbasp -p t2313 -U hfuse:w:0xdf:m -U lfuse:w:0xef:m If you use serial port....
The Spartan-3 board has Traffic light controller with FPGA I/O pins (details tabulated below). Traffic light controller card consist of 12 Nos. point led arranged by 4Lanes. Each lane has Go (Green), Listen(Yellow) and Stop(Red) LED is being placed. Each LED....
Autonomous vehicles are already in use in many manufacturing facilities, and they are also sold as toys. Perhaps one day, the world`s highways will be filled with cars requiring no user intervention. While we are not there yet, and may never get there, an....
In conventional triangular-wave oscillators, hysteresis from positive feedback in the Schmitt trigger determines the voltage levels and amplitude of the triangular waves. With this topology, it`s difficult to independently vary the voltage levels and....
This amplifier is the outdoor type, line installed outdoors, the amp`s main line; Figure 2 is the indoor power line box. Indoor and outdoor use between 50 ohm or 75 ohm coaxial cable to connect. e› 3 Figure 3, Figure 4 is the amplifier circuit board, and....
