A Squaring circuit diagram is shown in the following figure. It is a simple circuit, a variation of multiplier circuit. AD532 has an input capability which can be used to obtain a positive or negative ouput response to the input. There are many useful features on this circuit, suitable for control applications. It might eliminate [...]
The following circuit is a driver circuit for siren and usually used for car alarms. VD-MOSFETs are used to build this circuit. It receives the 12V power supply from the battery. A microprocessors sends complimentary pulse waveforms to the driver circuit as inputs. Here is the schematic : It uses two PHC21025 which contains two [...]
This circuit is similar with the telephone audio visual indicator and used as an additional indicator to the telephone and can be put inside any room. This circuit needs to be connected parallel with the telephone line. It doesn’t need the power supply since it uses the voltage available in the telephone line. Here is [...]
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