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 Wien bridge oscillator circuit

Wednesday, September 17th, 2014

This wien bridge oscillator circuit which is normal,low distortion and can easily adjust the resonance frequency that depends on the pair of the resistors (R) and capacitors (C). Which we can calculate by the formula. F = 1/2 p RC In this circuit as Figure 1 the oscillator are based by the R that include […]

 3000 watts Dimmer for Inductor Load

Saturday, September 13th, 2014

This is the 3,000 watts Dimmer for inductor load example: the Electric Fan, AC motor,Electric drill etc. But most general dimmers is used for resistors load only such as lamp, soldering iron, heating coil,etc. Why our project can do? The normal dimmer cannot use for inductor load, because the phase of current and voltage drop […]

 Multiples ways to increase the power supply current

Thursday, September 11th, 2014

If a DC power supply not enough for your job. The most cause come from the lower current of the transformer,which changing them is hard and expensive. This way maybe help you! Since the most transformers always is the center trap form for a dual power supply. For example: The transformer as Figure 1; The […]

 Easy Telephone Amplifiers circuit

Wednesday, September 10th, 2014

This is an easy telephone amplifier circuit. It will increase the signal of the telephone lines up. Then, drive the relay to controls the large electric bells that louder than a general phone. This circuit is modified from the speaker protection circuit, so easy and cheap. How it works Figure 1 the circuit diagram. After […]

 IC regulator protector circuit when load short

Tuesday, September 9th, 2014

Today I have a little idea is the ICs regulator protector circuit in a load short-circuit. We design for the 12 volts DC regulator only. For example: IC-7812, or others 12V power supplies. How it works Figure 1 is the circuit diagram In the circuit, IC3-7812 as the 12 volts regulator will supply voltage to […]

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