Circuit Project Electronic

A triac controller for switching resistive loads directly from the mains supply using the zero crossing technique. The device is powered directly from the mains via a diode and dropper resistor, and the IC has its own regulator to limit its supply to 9.25V. To ensure that no switching occurs outside of the zero crossing [...]

The controller uses one or more ordinary silicon diodes as a sensor, and uses a cheap opamp as the amplifier. I designed this circuit to use 12V computer fans, as these are now very easy to get cheaply. These fans typically draw about 200mA when running, so a small power transistor will be fine as [...]

= Warn the heat in an automobile
This circuit sets up in its automobile will perform to warn give testimony know before your car is will born the heat too much. By use main part electronic be IC 741 and Thermistors. By have LED Flasher with usual rate , when the temperature arrives at [...]