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The Colpitts Oscillator is characterised by tapping the mid-point of the capacitive side of the oscillator section. The inductor can be the primary side of a speaker transformer. The feedback comes via the inductor....
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Laser Command is a game which I build using a 8x8 matrix LED and an Arduino Mini. This game was developed as a "sample" class project in S10-05833 Gadgets, Sensors and Activity Recognition in HCI. The class is taught by Scott Hudson at Carnegie Mellon....
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From Figure 1, the host microprocessor (uP) controls the HMC6352 via I2C serial data interface lines for data (SDA) and clock (SCL). Two external 10k-ohm pull-up resistors to the nominal 3 volt DC supply create normally high logic states when the interface....
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This circuit is a modification of High & Low voltage cut-off with delay& alarm circuit appeared in Circuits today, which I have tried and found to be quite reliable. You can adopt this circuit with small modification. Use a transformer with secondary 15 0 15....
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This room light controller project automatically using Microcontroller Visitors Counter is a reliable circuit that takes the task of controlling the room...
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This application report presents one possible solution to the telecom plug-in power problem, based on a nominal 48 Vdc system bus and a module needing two low-voltage supply outputs. The material includes a detailed design methodology for tailoring the....
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Using the superposition theorem, I need to find the current of all the 3 nodes of the circuit. Using superposition I`ve found that the current from the source: Do you mean i_1 is the current through V1 when the other voltage sources are shorted out, in line....
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The schematic diagram come from circuit: 60 Watt Switching Power Supply power supply. Go to that page to read the explanation about above power supply related circuit diagram. The schematic shows the power supply capacity of 70W stereo amplifier Power....
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This page provides soft power switch circuits for toggling electronic devices ON and OFF with a momentary button press that controls a latching high-side MOSFET power switch. Several micropower latching switch circuits are provided. Owing to their low....
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This project started because I wanted a Li-ion charging circuit with more flexibility than afforded by other do-it-yourself circuits, but at less cost than the programmable computerized chargers. The goal from the beginning was to design, build, test and....
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This page features a circuit that has twenty open collector outputs that turn on one at a time in a continuous sequential manner. The circuit make use of the 74LSxx family of TTL integrated logic devices. The circuits are designed to drive light emitting....
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With extended periods of bright sunshine and warm weather, even relatively large storage batteries in solar-power systems can become rather warm. Consequently, a circuit is usually connected in parallel with the storage battery to either connect a high-power....
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// 555 Timer With On Off Delay Circuit Here is a timer circuit using common IC 555. The circuit is designed to facilitate time adjustment of both...
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The intended result is that the relay oscillates and the LEDs flash when the button is pressed, however when I press the button the leftmost LED lights constantly and nothing else happens. I get voltage across the left LED, the resistor and the capacitor,....
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Here is a quick guide, which will help you to get started off with kiCAD. In this tutorial we will be considering a simple astable multivibrator circuit using 555 timer IC ..
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The design is based loosely on some ideas from K8CU and AG6K. However, I have simplified the circuit somewhat and used different components. The mechanical encapsulation is also different. I used LTspice to verify the tester before building it. The schematic....
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A preamplifier operating on a single supply and suitable for use with high impedance type crystal pickups is shown here. The circuit is basically a non-inverting AC amplifier in which the gain is dependent on the feedback resistor R4. The smaller is the R4,....
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The MSK4204RH is a radiation hardened complete H-Bridge microcircuit intended for use in DC brushed Motor Control applications or Class D switchmode amplification in space or other severe operating environments. The internal compo- nents have been selected....
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This Circuit have output voltage 14 volt with current maximum 4A. Can be use on nicad battery and accu, wet and dry. But the accu must be 12 Volt and have current 4A or higher. The current fillter voltage build of IC CA3140 or LM324. You can which two IC.....
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This is a fun and useful circuit for demonstrating high frequency high voltge. It can produce up to about 30KV, depending on the transformer used. It is cheap and easy to make, thanks to the standard TV flyback transformer used. It can power LASERS (although....
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The HV739 is a monolithic single channel, high-speed, high voltage, ultrasound transmitter pulser. This integrated, high performance circuit is in a single, 5x5mm, 32-lead QFN package. The HV739 CAN deliver up to a ±3. 0A source and sink current to a....
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An infrared remote control tester circuit that can be made without spenting much money. This IR tester build around an infrared reciever module TSOP1738. We can observe the remote control state by listening to the buzzer sound. The circuit is very sensitive....
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Fading a video signal can`t be done simply by attenuating the composite signal, since the synchronization signal may drop below unacceptable level. Here a ...
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Here we have an astable oscillator built around 555, which gives an alarm tone of 1. 8 KHz directly driving a speaker. This is basic alarm circuit, which is later used in many other projects in the book. While the circuit shows only 1. 8 KHz operation, it....
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The two circuits illustrate opening a relay contact a short time after the ignition or ligh switch is turned off. The capacitor is charged and the relay is closed when the voltage at the diode anode rises to +12 volts....
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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....
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The 7208 seven-stage decimal counter can be used as the frequency counter, it has the latch and multiplexing functions, and it has the direct digital driving circuit and the display driving circuit. 7207IC 6.5536MHZ crystal oscillator`s output frequency is....
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Crystals usually operate at fundamental frequencies up to about 15 MHz. Whenever higher frequencies are required a frequency multiplier is placed after th....
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The following circuit shows about Power Supply For Amplifier Circuit Diagram. Features: Easy to build, supported by an adeguate electric response, make a ....
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This white-LED driver circuit is ideal for use in a garden light. It automatically turns the LED on at night and runs from a single 1. 2V nicad cell which is recharged by a solar cell during the day. The prototype used the existing casing and solar cell from....
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This is a simple single chip metal detector circuit based on IC CS209A from the Cherry Semiconductors. A 100uH coil is used to sense the presence of metal. The IC CS209A has a built in oscillator circuit and the coil L1 forms a part of its external LC....
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The driver stage works in the same manner as the class A output stage described previously. However it is only working at a couple of milliamps, so efficiency is not an issue here. The biasing arrangement should be familiar by now. Some sets, including the....