Popular Circuits Page 15
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The microcontroller within A / D converter can use PIC MCU within A / D converter produced by the Microchip. MMA1220D`s state end and self-test end are connected to the P1, P0 ports of ?C, its output voltage is sent to the A / D converter input end. C1, C2....
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This circuit can produce up to 1 W of audio power to drive a speaker or horn. When the CDS cell is struck by light, its resistance decreases thus activating NOR gate (a) thereby causing (a) and (b) to produce a low-frequency (10-Hz) square wave. This pulses....
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As an accurate phase shift at 90, may be put R. Gao with a specific frequency into play with a variable resistor VR, P crown. Adjustment. And the use of OP amplifier differenti..
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In those cases we want to measure the temperature in an area far from where it is. The imaging unit installed, you should find some way to connect the latter with the necessary sensor. The cables we use most often will have three two conductors for power....
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While talking to a distant subscriber on telephone, quite often we feel frustrated when the voice of the distant subscriber is so faint that it is barely intelligible. To overcome the problem, circuit of an inexpensive amplifier is presented here. It can be....
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The circuit diagram shown here is of a 2 x 60 Watt stereo amplifier based on the LM4780 from National Semiconductors. LM4780 is a superb audio amplifier IC capable of delivering 60W Rms power output / channel into 8 ohm speakers. The LM4780 has very low....
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MAX5953A provides a simple, inexpensive, complete, non-isolated power IC solution for Powered Device (PD) in a Power-over-Ethernet (PoE) system....
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When used in the servo system, often using the current drive connection. Figure 11-1, the output current IOUT and the input channel number y.. It is proportional. Current drive mode can be reduced because the motor has a large inductance causes a phase....
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The timer includes an oscillator and a counter in an integrated circuit. The timing interval equals the oscillator period multiplied by the number of cycles to be counted. The oscillator frequency depends upon resistor RS and capacitor CX. The number of....
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Those of you who own large 500 watt and higher Astron linear power supplies, and even large HF amplifiers, know all too well that "GNNNNnng" sound that they often make when turned on. This is due to the high inrush (surge) current flowing into the....
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This is the Sawtooth Wave Generator circuit diagram with the detailed explanation of its working principles. The electronic circuit simulator helps you to design the Sawtooth Wave Generator circuit and to simulate it online for better understanding....
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The proliferation of industrial and computerized equipment containing programmable memory has increased the need for reliable recording media. The magnetic tape medium is presently one of the most widely used methods. The primary component of any magnetic....
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AC power is rectified and applied to the motor in the same polarity when the momentary switch is held in one direction and reversed polarity when the motor is held in the reverse direction. The remote car starter package that I used includes a control unit,....
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The Atmel ATmega series of microcontrollers are very popular due to the large number of peripherals inbuilt in them. They have features such as internal PWM channels, 10-bit A/D converters, UART/USART and much more, which are useful for a lot of applications....
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Drawing, transistors constituting the gate VTi, VT2, VT3 and the like. ..
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The The Circuit of DC Voltage Doubler was designed on arrived type Power Supply. Please study carefully and comprehend by the side of schematic design photos of The Circuit of DC Voltage Doubler to pick up factor in sequence. This is a economical DC Voltage....
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Considering the technical requirements defined in the previous topic as the starting point, this topic will explain in detail the design of every block of the radio frequency (RF) front-end. To accomplish a design that fulfils specifications, the design is....
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In this part of the inquiry in a series of 5-band Equalizer circuits with a single IC BA3812 L. a device used in the hi-fi. IC BA 3812 This is with 5-point Equalizer with all the functions integrated in IC. Equalizer has advantages, namely: small distortion,....
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When this alarm is activated its Siren will sound once - for up to 20-minutes. Then it will switch off and remain off. The basic circuit has a single zone with independently adjustable Exit and Entry delays. This will be adequate in many situations. However,....
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The VNGBOX micro needs to produce a very accurate, high resolution and very noise-free DC control voltage to steer the reference oscillator phase accurately. Any noise on this signal will result in noise on the reference; any non-linearity, especially any....
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The circuit below uses a CMOS dual D flip flop (CD4013) to toggle a relay or other load with a momentary push button. Several push buttons can be wired in parallel to control the relay from multiple locations. A high level from the push button is coupled to....
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6DJ8 Tube RIAA Phono and Line Preamplifier Schematic. The HT power supply uses tube rectification and regulation..
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An analog output for my Arduino. The most common way to build a DAC is to use a R-2R ladder circuit. However, this DAC has no output buffer, which would make this circuit a bit more reliable and working with all kinds of loads. For the best results, you....
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If you decide to use 2 circuits, i just connect their outputs together...neg output from first circuit to neg output of second circuit & pos output from first circuit to pos output of second circuit.
And take readings from same place....from where you....
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Decade counter circuit is a electronic circuit to perform a sequence of numerical calculations either forward or backward calculation. What is meant by forward calculation is where the circuit will count ranging from small numbers to larger numbers. While....
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The ability amp lath has remained banausic back it was aboriginal appear in 2002. It absolutely isn`t broken, so there`s no acumen to fix it. The photo beneath shows a absolutely accumulated lath (available as apparent as M27). Application TIP35/36C....
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The coil has been added a few extra turns, so I had to find a way to improve the insulation. I opted for epoxy, with some extra quantity added over the soldering:..
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With only three components and a buffer, a line frequency square wave having a 1:1 duty cycle may be derived from the power supply. During the alternate half-cycle, however, A is effectively clamped to - 0.7 V by Dl in the bridge which offsets the forward....
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This circuit senses AC audio voltage supplied to the car-radio loudspeakers and displays it as power using a LED bar graph, achieving at the same time an attractive visual effect. It is designed to cover common car-radio output power ranges, but can easily....
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SUMMARY This circuit is one of the most basic and popular sensor modules. In electronics, this sensor is analogous to human s visionary senses which can be used....
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This reflex radio project was inspired by Robert Bazian 's design. His reflex radio is the "darndest" thing I have seen and his spectacular results inspired me to come up with my own version! These designs are similar to two-transistor circuits used in some....
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All miniature electronic devices operate off batteries. Some of them need higher than the standard battery voltages to operate efficiently. If the battery of that specific voltage is unavailable, we are forced to connect additional cells in series to step up....
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The Schematic above shows a 10A power suplly with a 5V output and with power 50W. It is a flyback converter operating in the continuous mode. The circuit features a primary side and secondary side controller with full protection from fault conditions such as....
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Protect your expensive batteries from discharge damage with this mini-sized electronic cutout switch. It uses virtually no power and can be built to suit a wide range of battery voltages. Back in May 2002, we (Silicon Chip) presented the "Battery Guardian",....
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For this project, we`re going to demonstrate how a capacitor can supply a pulse signal to a speaker. We`re going to charge a capacitor and then discharge the voltage of the capacitor to a speaker. The speaker, a transducer which turns electrical signals into....
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The programmer uses serial signaling scheme to program the chip in circuit. The signaling is carried through the programming clock (PGC or ICSPCLK) and the programming data (PGD or ICSPDAT) pins. In addition, the MCLR/VPP pin is used as either a high voltage....
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The L620x is a monolithic full bridge switching motor driver realized in the new Multipower-BCD technology which allows the integration of multiple, isolated DMOS power transistors plus mixed CMOS/bipolar control circuits and is available in many versions :....
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The receiver has a bigger motor to drive the wheels and a smaller motor to drive the steering which is not proportional. You could add an extra channel to the receiver by using the spare latch. Again there is no separate on/off switch on the transmitter....
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Circuit shown in Figure 3-134. This circuit uses automatic control braking means, it is given in Figure 3-133 (a) a base improvements made on the basis of using the time relay ..
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3-state sound generator with LM556 . LM556 is a dual timer that can be operated as two LM555. The two timers operate independently of each other sharing only VCC and ground.You can define timing...
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The circuit below uses a CMOS dual D flip flop (CD4013) to toggle a relay or other load with a momentary push button. Several push buttons can be wired in parallel to control the relay from multiple locations. A high level from the push button is coupled to....
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The PC processor generates very high temperature during its operation which is dissipated by the large heat sink placed above the processor. If the heat s....
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This simple alarm circuit was designed for use in a combined garage and rumpus room. It can be assembled on Veroboard and uses just one IC plus a handful....
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Function Generator Virtual Oscilloscope Sound card based multi-functional design, and virtual function generator Microcontroller based Function Generator Design and Implementation of graduation. The total program function generator Generally refers to the....
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L1 is a loop of 10 to 20 turns of insulated wire with a diameter anywhere between 4" to 4'. Oscillator frequency (7 to 30 MHz) shifts substantially when a person comes near or into the loop. This oscillator together with a resonant detector might make a very....
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The circuit uses a Hall-effect sensor, which consists of an IC that resides in a small gap in a flux-collector ..
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CSJ-T300B/CSJ-R02B is to increase the digital encoding and decoding circuit in CSJ-T300A/CSJ-R02A basis after the formation of the remote control circuit consists of CSJ-T300B ..
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Amplify a MG811 CO2 sensor to a range readable by an ATMEGA2560 (0-5v). I have other analog sensors, so do not want to change ref voltage on Atmega. I have found a module that scales the signal and want to replicate the circuit from the documentation, but....
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In appliance that appeal for aerial current, Nicad (NiCd) rechargeable array still has the angry achievement compared to NiMH and Lithium battery. The charger ambit actuality is acute in the way it handle the amiss polarity of the array placement. The core....
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In some cases, appliances and equipment are able to operate when supplied by two different levels of AC line voltage to their main terminals (120 V or 240 V). This is why, it is very common that appliances and equipment have mechanical selectors or switches....
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Hi and welcome to my first instructable! I`m going to show you how to make your own low-power wireless charging circuits that will let you pass elect....
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A touch screen is an electronic visual display that can detect the presence and location of a touch within the display area. The term generally refers to touching the display of the device with a finger or hand. Touch screens can also sense other passive....
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?? ??????? ????? ??? ???????? ?????? ????????? ??? ???????????? TDA7294 ??????????? ??????????, ?? ???? ???? ?????????????? ??? ???. ?? ?????????? ?????? ?????????? ?? ???? ??, ???????????? ?? ????? ????? ???? ?? ?????? 8? ??? 4?. ?? ???? ???? ?????????....
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The above circuit can be useful to detect if the load of any battery charger or plug-in adaptor supply is not properly connected. The load can be a set of batteries to be charged or any other type of battery or low dc voltage operated device...
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CAN Controller Area Network Bus line, namely control device LAN. Because of having high performance, high reliability and unique design, CAN bus line paid attention to more and more by people. Bosch Company of Germany controls and control system design CAN....
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I`m doing this lab BCD COUNTER and 7 SEGMENT DISPLAY and im using CD4510BMS presettable BCD Up/Down Counter. I was able to do the counting from 00-99 but i can`t figure out the counting from 32-84. Do i need another gate for this operation Okay, sorry about....
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The IR Widget captures the infrared signals used by remote controls. It is able to determine the carrier frequency and demodulate the carrier in the digital or analog domain. The captured information can be used to reproduce or recognize the signal. The....
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The broadband amplifier NE592 can be used also for building a simple selective audio amplifier. By means of the +6 V and +12 V supply voltages a DC coupling between the product detector and the AF amplifier is possible. The DC level at the differential....
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This circuit idea is certainly not new, but when it comes to making a trade-of between using a small, short-circuit proof transformer or a capacitive voltage divider (directly from 230 V mains voltage) as the power supply for a fan, it can come in very....
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To program some AVR microcontroller unit (MCU) you will need an AVR programmer. The better way to do that, is to buy some development kit like STK-500. This kit have the advandage to give you serial port, LCD connector, SRAM socket, 8 switches, 8 LEDs,....
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A friend of mine bought a fairly new (only a couple of years old) Fender 60W combo off a guy he knew for £5. The original owner had taken it to three different repair shops, and been told it wasn`t worth repairing. I told my mate it couldn`t be much, and....
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This mosfet fm transmitter circuit is designed to be used for aligning FM radio receivers. It has a microphone amplifier with automatic gain control. The FM modulation is a voltage oscillator and the final stage is built with MOSFETs. A lowpass filter at the....
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A device used to generate different types of electrical waveforms over a wide range of frequencies is called function generator. The most common wave forms are square, sawtooth, triangular or sine wave shapes (drawn from top to bottom). The drawing shows an....
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This electronic keyer uses four ICs (five, if the optional sidetone oscillator is desired) and operates from dc sources of 9 to 15..
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BTW, I guess I should add another input cap for high frequency noise though that`s hardly relevant to this question (and the schematic is just a very rough test circuit anyhow). The goals are 0 - 12 V at up to 2 amps (1. 5 would probably be good enough,....
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A high voltage power supply 3V to 500V DC converter and someone suggested a circuit from techlib H. V. generator for Geiger tubes : However, when I tried to simulate it didn`t work, the output is nearly 9V, as the input. In the schematic I drew, the only....
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When both S1 and R2 are on, current flows through each of the lamps, which are connected to the rheostat in. parallel. The amount of current flow and thus the intensity of illumination can be controlled by varying the effective the batteries because the....
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The circuit is based around LM4702 manufactured by NATIONAL semiconductors MJ11029-MJ11028 by ON semiconductors It is a high fidelity audio power amplifier. Designed for demanding consumer and pro-audio applications. You can also use this circuit with AV....
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The circuit of preamplifier use the 5533 chip and features a combination of controls balance and volume. Due to the nonlinearity of the human auditory system, low frequencies must be boosted at low listening levels.
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A very interesting remote controlled alarm circuit using TSOP1736. Routing of an electric cable to attach a calling bell switch near the bed of an old age/...
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This 15v variable power supply electronic project is designed using 2N3055 transistors. Output voltage of this variable power supply can be adjusted in the range between 1. 5 and 15 volts. This 2N3055 15v variable power supply can provide a maximum current....
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This article will show you how to build your own version of the Fire-Stick infrared remote control system. The LITEON infrared receiver modules originally designed-in to the Fire-Stick have been discontinued, and forced us to re-design the original circuit....
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This circuit utilising a 555 timer IC can be used as an alarm system to prevent the theft of your luggage, burglars breaking into your house etc. The alarms goes ON when a thin wire, usually as thin as a hair is broken. The circuit is straightforward. It....
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The Servo Timer II was primarily designed for parachute deployment on water rockets, but can be used for other applications. The timer controls a single RC servo motor that can open a latch on a parachute door. Once triggered the timer waits a set amount of....
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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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Alternating current voltage amplifier transistor AC path. In AC analysis, since the internal resistance of the AC supply voltage source is small, it corresponds to the short-ci..
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A new spin on a great kit. Have you ever seen the dot-matrix displays that can display letters, numbers, or even icons Once you know the basics for how to display something on one matrix, you can daisy-chain the Maxim Max7219 ICs and LED matrices to display....
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The circuit for the rs232 serial interface is of mild complexity. The main parts of the circuit are the 18F4520, MAX233A and DB-9 Connector and these portions of the circuit will be described briefly below. This is a basic +5v power regulator circuit for the....
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And the general high-frequency circuits, in the microwave band, the use of microstrip circuits to achieve input and output matching and frequency selective amplifier circuit. F..
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Automatic dark detector senses darkness. As the light level decreases and LDR meets the maximum threshold resistance, the circuit automatically switches on the LED D1. A light detector senses light. As the light level increases and LDR meets the lowest....
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We know that every inductor coil has a certain amount of resistance and the coil should have lowest possible resistance. The ratio of the inductive reactance to the effective resistance of the coil is called the quality factor or Q-factor of the coil. A high....
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The circuit diagram shown here is of a simple DC power delay circuit that is based on an SCR. This circuit is a very handy one and can be employed in many applications. The working of this circuit is very simple. When the input power is applied the capacitor....
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CD-ROM 48X RF AMP Chip is RF pre signal processor and processes signals from optical pick-up. This chip processes main signal through summing amp, AGC block, EQ block, and generates SERVO error signals for SERVO control. It CAN playback CD-ROM and CD-RW....
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A TTL counter, an 8-channel analog multiplexer, and a fourth-order low-pass filter can generate 10- to 25-kHz sine waves with a THD better than -80 dB. The circuit cascades the two second-order, continuous-time Sallen-Key filters within ICS to implement the....
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Always wanted to do morning exercise machine, also suffering no single power can not find high-power amplifier, as morning exercise machine is battery powered, so thinking abou..
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