This is a simple and a very useful circuit to slow down the PC fans and remove the noise.
This simple circuit is based on the well-known integrated circuit LM3915.
2x10W amplifier LA4280.
On-off sequence of three relays with a push button, microcontroller PIC 12F675.
A very precise digital thermometer with LM35 probe (0,1 degree of freedom).
This precise full-wave-rectifier is a circuit made to rectify those values that a normal bridge rectifier cannot rectify.The diminution of the diode bridge rectifier’s typical power is (obviously, it depends on the type of the diodes) of the 0,7 volts-an approximate value.
2x18W amplifier TA8205.
Current clamp with a microcontroller.
This circuit is composed of two integrated circuits. A digital analogue converter (CA3162) and a seven segment decoder (CA3161).
2x30W amplifier TA8220. rn
In-out thermometer with 16F873A microcontroller.
The project that we present here is a meter of volts, amps and watts, to which we have also incorporated a temperature sensor to activate a fan, or other mechanism that we want, through a relay.