New Circuits Page 83
- Page 83
-
The function of this circuit is to sound a buzzer, or, optionally, actuate a relay, when a certain moisture level is detected between a pair of probes. The circuit has a memory` in the form of a flip-flop, IC1a-IC1b, which enables or disables a tone....
-
-
This SCADA controller is designed for use with distribution (13. 2kV/4. 8kV) substation transformer breaker positions where an automatic throw-over is present. The RTU voltage is 24V. DC. The breaker status and Lockout relays operate at 48V. DC...
-
-
A simple lead acid battery charger circuit with diagram and schematic using IC LM 317,which provides correct battery charging voltage. This lead acid battery charger should be given an input 18 Volts to IC....
-
The LM4550 is an Audio CODEC for PC systems which is fully PC99 compliant and performs the Analog intensive functions of the AC97 Rev2. 1 architecture. Using 18-bit Sigma-Delta A/Ds and D/As, the LM4550 provides 90 dB of Dynamic Range. The LM4550 was....
-
A densitometer is one of the most valuable tools a darkroom enthusiast can employ. Up until recently, however, densitometers were expensive and bulky. Furthermore, densitometers which would talk to your computer and calculate effective film speed, contrast....
-
-
-
The YN-460 is a very low cost manual-mode-only shoe mount flash made by a Chinese company Yongnuo. It has become very popular in the strobist community due mostly to its low cost and good performance. In order to change flash power level, the user is....
-
Clock signals are the heartbeats of digital systems. Hence, the stability of clock signals is highly important. Ideally, clock signals should have minimum rise and fall times, specified duty cycles, and zero skew. In reality, clock signals have nonzero skews....
-
Inexpensive miniature transformers normally provide one or two secondary voltages, which is sufficient for generating a set of positive and negative supply voltages, such as are needed for operational amplifier circuits. But what can you do if you need an....
-
This example describes a metal detector which uses a PLL (phase locked loop) digital integrated circuit MCl4046, it can emit the alarm signal when detects metal objects, and it can determine detected material which is based on current meter`s instructions.....
-
-
40 meter Direct Conversion Receiver. Using the circuit of 40-metre band direct-conversion receiver descr- ibed here, one can listen to amateur radio QSO signals in CW as well as in SSB mode in...
-
Low frequencies predominantly cover our earths atmosphere. This range of frequency may be created by many different sources which may be quite unknown and strange, a VLF sensor equipment can be made to trace these frequencies for investigating the intriguing....
-
Circuit Kunci Digital Ber-password is the circuit diagram of a simple electronic combination lock usingLS 7220. Circuit Kunci Digital Ber-password Password Digital can be used to activate a relay for controlling (on & off) any device when a preset....
-
A magnet is placed on the door and a magnetic reed switch on the door casing so when the door is closed the circuit is disabled. When the door is open, the....
-
The HS-3182 is a monolithic dielectrically isolated bipolar differential line driver designed to meet the specifications of ARINC 429. This Device is intended to be used with a companion chip, HS-3282 CMOS ARINC Bus Interface Circuit, which provides the data....
-
This optical trigger is a general purpose module for use with `standard` 3mm package infrared diode emitters and corresponding matched phototransistors. The emitter terminal on the module will source about 27mA to ground with a 1. 2 V drop across the diode.....
-
This year for Valentine`s Day I decided to get nerdy and make something electronic for Caroline. I first tried to make a animated LED heart with a joule thief and a single AA battery, but I couldn`t make a suitable air coil. So, I decided to modify this....
-
This logic probe can be selected to operate on TTL or CMOS logic levels, depending on switch S1. A string of resistors associated with switch S1 sets the threshold levels for a window comparator comprising IC1a and IC1b. Depending on whether the level....
-
So I`ve searched the forums, and the internet, and I`ve put together a schematic for a 16 channel passive summing mixer I would like to build. I`m....
-
The microcontroller IC is a device that looks like a common IC. But inside it, the virtual a miniature computer. This device can be used instead of transistors....
-
-
This is probably the simplest radio that one could ever imagine of making. The circuit is so simple that it could be finished assembling within a few minutes and you are already listening your favorite programs over it. The circuit of a single transistor....
-
The orange lines indicate the positive voltage and the yellow lines indicate the negative voltage, also known as ground. You can do the wiring by soldering components directly to wires, or use a small bit of perfboard/circuit board. To ensure this thing....
-
This is a great old periscope game. Ships pass by in the dark and your job is to hunt them down. When I plugged it in I heard a loud 60hz hum from the audio circuit. The game started but couldn`t aim properly and ships would not explode when hit. Also it....
-
FM Modulator circuit is a simple FM modulation circuit using IC 555, where the resulting modulated signal has a tenuous meeting depends on the signal frequency information. The resulting signal can be spelled out quite nice and stable so that the result will....
-
Multivibrators is two state devices which is used extensively in digital electronics. The bistable multivibrators or called filp-flop are the basic memory....
-
-
Call letters stored in 8223 PR0M U3 drive 74151 multiplexer/data selector U4 for keying NE555 audio oscillator U5 which feeds transmitter mike input through RA. Timed holdoff keeps identifier from being rekeyed within spedfied time period, with reiden.....
-
Consumers of mobile wireless devices expect a workable, real-world balance of performance and battery life. This is particularly applicable in third-generation (3G) wireless designs, due to the fact that these devices will house more powerful and feature....
-
As shown in figure, D187 is an UART, it`sRX / TX signalconnectedonoptocoupler N21, N22 and N29, so that put the RS-485communication interface receiver / transmitter D28and microprocessor D211 completely optoelectronicisolated. D197 is a generator, the....
-
To charge lead-acid batteries we can use this circuit that consist of a current-limited power supply and a flyback converter topology. Here is the schematic ...
-
For the long-distance listener (dx-er) it is a treat to listen on a band 8MHz wide which normally is completely empty, but which is capable of providing periods of clear reception during the `Sporadic E` season from several distant countries. Usually only....
-
-
This simple circuit can be used to program the PIC16F84 and similar "flash memory" type parts. It uses a cheap 555 timer IC to generate the programming voltage from a +5V rail, allowing the circuit to be powered from a computer`s USB port. The 555 timer....
-
The circuit is placed parallel with the exit of power amplifier and us gives the level of signal ,from output. Changing resistance R1, in the input circuit, we adapt the indication of power, in the resistance of loudspeaker, that we use..
-
This 40KHz crystal controlled oscillator circuit drives an infrared LED with powerful 40ma pulses..
-
AM radio receivers receive or demodulate amplitude modulated (AM) signals. The most common source of these signals is of course todays Standard AM Radio Broadcast Band but shortwave stations use AM modulation as well. Amplitude modulation was really....
-
This circuit is shows how a low drift preamplifier can be added to improve the measurement resolution of a thermocouple. The preamp is powered from the reference regulator, and bridge feedback is used to bias the preamp input within its common mode range.....
-
-
-
The schematic below showsTLE5206-2 5A H-Bridge for DC Motors Circuit Application. It such a device which has an integrated power H-bridge with DMOS output stages for driving DC-Motors, according to the datasheet. TLE5206-2 Circuit Application describes Input....
-
This describes my original design dual channel quantizer inspired by Chris List`s ARP Style CV Quantizer design. My new implementation is an intelligent design that exploits the programmability of a Microchip PIC16F84. It will quantize voltages in 1/12 volt....
-
-
The simplest stereo balance meter circuit schematic available on the internet! When Left and Right signals are equal, no output is present from U1 and pin....
-
-
Embedded Systems is simply the brain of the most of the electronics based systems to access, process, store and control the data. Few simple electronics circuits can be intelligently hardware designed without a microprocessor or microcontroller but is not....
-
The Oscillator DesignGuide is integrated into Agilent EEsof`s Advanced Design System environment, working as a smart library and interactive handbook for the creation of useful designs. It allows you to quickly design oscillators, interactively characterize....
-
The circuit was constructed around the functionality of a Class A amplifier to create a headphone circuit. BC308 an epitaxial planar PNP transistor used....
-
This is the eye diagram for the transmit pair. The receive pair is very similar. It`s a LAN8700 PHY, and I`ve got the MII interface effectively disabled, so the PHY is transmitting IDLE code sequences. It`s forced into 100Mbit/FDX as per the datasheet.....
-
The micro ampere meter shown here is basically a DC millivolt meter. The circuit gives full scale deflection for 0. 1V input. The current to be measured is passed through a known resistance R and the voltage drop across it is measured. Here the IC 1 uA 741....
-
This oscillator circuit permits crystals to be electronically switched by logic commands. The circuit is best understood by initially ignoring all crystal....
-
This circuit is identical to the one in the Single Buss 1V/Octave Keyboard Controller. See the circuit description there. This board has the addition of the resistors used in the keyboard voltage divider. Whereas in typical keyboard pressing a key brings the....
-
Relays are often used as electrically controlled switches. Unlike transistors, their switch contacts are electrically isolated from the control input. On the other hand, the power dissipation in a relay coil may be unattractive for battery-operated....
-
This weekG•s plan is to build a device that warns of the potential of a knockdown the process by which an over-canvassed ship is lain over on her beam-ends. The potential for sinking at this point is high, so it is an event to be avoided. As the reading of....
-
-
Set R5 to read 1V RMS on an Audio Millivoltmeter connected to the output with R7 rotated fully clockwise, or to view a sinewave of 2. 828V Peak-to-Peak amplitude on the oscilloscope. An audio amplifier is an electronic amplifier that amplifies low-power....
-
The Part of 1995 Ford Ranger Wiring Diagram: transmission range sensor, electronic engine control, clutch pedal position switch jumper, electronic engine control, speed control, automatic transmission, starter interupt relay, rela box, starter motor during....
-
This simple VU Meter may be used in variety of projects. Since real electro magnetic type VU Meters are no longer available or too expensive, I decided to make this one using LM3914 and 10 LEDs, which I can use in my other projects...
-
-
-
The working and circuit diagram of a low cost amplifier using transistors BC107, and BC148 is explained in detail....
-
Make the following connections: GND (pin 8) to ground, Vcc (pin 16) to 5V OE (pin 13) to ground MR (pin 10) to 5V This set up makes all of the output pins active and addressable all the time. The one flaw of this set up is that you end up with the lights....
-
-
-
The NESCAF audio filter is a small and low cost circuit that works great. It is a good addition to any amateur radio setup. It is especially useful with radio receivers or transceivers that lack an optional CW filter. I have made a product review of the....
-
The TS4956 is a complete Audio system device with three dedicated outputs, one stereo Headphone one loudspeaker drive and one mono line for a hands-free set. The stereo Headphone is capable of delivering more than 25 mW per channel of continuous average....
-
This novel circuit uses a flashing LED as the clock input for a 4017 decade counter. Typical flashing LEDs (eg, DSE cat Z-4044) flash at about 2Hz so the outputs Q0-Q9 will cycle through at that rate. For example, Q0 will turn on for half a second, then Q1,....
-
This circuit provides symmetrical ±output voltages, both equal to one-half the input voltage (one 9-V battery in this case). The output voltages are referenced to pin 3 (output common). The circuit will operate with other battery voltages. If the battery....
-
This inexpensive circuit can be connected to an air-conditioner/fridge or to any other sophisticated electrical appliance for its protection. Generally, c....
-
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. ..
-
This audio amplifier designed uses two LM3886 per channel, in parallel circuit, based on the PA100 parallel amplifier detailed in National Semiconductor`s application note - AN1192. This amplifier can deliver about 50W into a 8-ohm speaker and 100W into a....
-
As you can see in this FM IF MW radio receiver circuit schematic the LA1260 ic can be used in AM FM radio receiver electronic projects. LA1260 has integrated in the package many functions and features that are needed for radio receiver applications. high S/N....
-
This is a simplified version of the Universal Keypad-Operated Switch. I have modified the design to reduce the complexity of the circuit - and the number of components required. As a result - the code is somewhat less secure. However, there should be lots of....
-
The above circuit is fm receiver. when i used pin supply 9V, this circuit had quite nice performence. But when i used AC/DC rectifier or switch supply ....
-
With the impending close down of the 405-line transmitter network those of us with collections of early TV sets are having to make new arrangements to supply them with suitable signals. Whatever the scheme used, some method of converting baseband audio and....
-
Most of the battery chargers do not have current and voltage regulation provisions. The step down voltage is simply used for charging. These chargers devel....
-
This circuit uses a synthesized sound chip from Holtek, the HT-2811. This reproduces the sound of a ""ding-dong"" chiming doorbell. Additionally, the circuit includes a CMOS 4026 counter display driver IC to count your visitors....
-
-
I initially designed these circuits for a friend who had muscle problems and while he says they did work well for him, I "DO NOT" RECOMMEND THE USE OF THESE DEVICES BY ANYONE FOR ANY REASON. I ACCEPT NO RESPONSIBILITY OR LIABILITY FROM THERE ASSEMBLY OR USE....
-
Inverter circuit to power EL backlights and fluorescent tubes, so the output is about 127 VAC as he claimed. But I want 1kV or more to make at least 1mm purple plasma as Tesla coil usually produce! (30kV is required to make 1cm length plasma). Therefore i....
-
-
This circuit will allow the brake light was flashing. The default behavior. When the power supply to the circuit, Or tap the brake it. The IC timer IC2 drive current to transistor Q2 and producing oscillator output, pulse signal output at pin 3 to input pin....
-
The Arduino reads temperature from a MCP9700 temperature sensor IC and displays the temperature in the Arduino IDE serial monitor window....
-
High voltage switching stabilized voltage supply circuit is shown in the diagram. It is the switching power supply of 80P type color TV. It adopts auto-excitation, PWM circuit. Its output is isolated with power system. This power supply has 110V and 18V DC....
-
One of the coolest parts of working on the Yahoo Purple Pedals project was figuring out how we could get the bikes as far off the grid as possible. Once we decided on using the N95 as the brain for the bikes, we had to figure out how much juice it takes to....
-
-
The Hartley Oscillator is a particularly useful circuit for producing good quality sine wave signals in the RF range, (30kHz to 30MHz) although at the higher limits of this range and above, The Colpitts oscillator is usually preferred. Although both these....
-
I built this circuit from the led beating heart frame instructable. I can`t seem to get it to work. Any ideas? I also built this led sequencer. It doe....
-
-
A voltage-controlled oscillator using NE555 The circuit is usually known as a voltage-to-frequency converter as a result of the output frequency will be modified by changing the input voltage. As mentioned in previous blog posts, pin 5 terminal is voltage....
-
This is a new design of a tutorial board based on the popular PIC16F84A microcontroller. It features eight single leds, a 7-segment display, an LCD display and five push buttons. It is an ideal solution for the beginner to take his/her first programming....
-
The optically-controlled circuit has essential function in urban street lamps or corridors are lighted, adopt the optically-controlled circuit, can open and shut off the lighting lamp automatically according to power of the light, make sure nobody....
-
How to get an LED-Wiz to control pinball solenoids. Rottendog Amusements makes modern replacement Driver Boards like this Williams WPC89/WPC-S replacement. While it is better than the originals, this board is still rather large, though it does handle more....
-
Amplifiers which run from 12V DC generally don`t put out much power and they are usually not hifi as well. But this little stereo amplifier ticks the power and low distortion boxes. With a 14. 4V supply, it will deliver 20 watts per channel into 4-ohm loads....
-
Filters with high orders are designed usually with 2 or more cascaded sections. This order 4 filter need only one OA IC , so we can achieve lower distorsio....
-
-
The design is based around a pair of 433MHz wireless modules. These can be bought pre-built and contain all of the radio frequency components that we need. We use these modules in our two circuits; one to transmit our vario audio and the other to receive and....
-
Any ideas Is this circuit going to be stand alone Any other circuitry around it, perhaps a microcontroller What circuitry does the timing device contain, or does it even contain electronics abdullah kahraman Mar 22 `13 at 18:10 Since you do not want much....
-
The voltage regulator built onto the Arduino Uno is a linear-type regulator and is horribly inefficient. If you are running the ATmega238 at 5V using a 9 V battery, approximately half of the battery`s energy will be dissipated as heat by the regulator. This....