Free Simple Circuit Diagram
A pulse counter can be built by using 7490 decode counter and 7557A. This circuit can count from zero to 9. Pins 3 and 2 of all 7490’s must be connected together. Here is the schematic diagram of the circuit: A push button is used as reset. The input of this circuit is a pulse that is produced by other […]
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Using only two active components, we can build an AM radio receiver working on MW (Medium Wave) Band. The circuit uses straight receiver configuration, where an LC resonator circuit is used to filter the received RF signals and then directly rectified and further filtered to obtain the carrier’s envelope signal, which is the modulating information signal we want to hear. […]
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The silicon controlled rectifier (S.C.R.) is called as the thyristor. It is like a diode, when the cathode is negative with respect to the anode, the current flowing from cathode to anode. But, the difference of thyristor and diode is the current will flow then the cathode is also negative with respect to the gate. Here is the schematic diagram […]
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This is a The Crowbar circuit. This circuit is used to prevent the load from damaging. This circuit utilize a zener diode. The regulator steps down the 12V input to 5V. The load will damage when the regulator is fail to step down the input voltage because the load receive 12 volts. Using the zener diode, the problem can be […]
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