This circuit is made to protect the speakers from the "pump" inconvenience, that is produced in some amplifiers while they are on.
2x10W amplifier LA4280.
Based on the Countdown with LCD 2x16, we have made this variant of the countdown. The countdown circuit, or the backwards counting we shall describe, shows the visualisation of the backwards counting on four 7 segment displays.
On-off push button with a 12F675 microcontroller.
A resistive divider is an electric circuit to which we join a voltage and so obtain its reduction.
To assemble a computer part by part is actually simpler than it looks like. You only have to follow basic rules.
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.
When we have an audio circuit, it is necessary, for the better shielding, and to avoid unnecessary noise, to create a ground plane.
The circuit is based on a 16F873A microcontroller PIC.
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.
With a simple circuit and a microcontroller pic, 16F873A model, we designed this digital voltmeter in addition to any power source.