disco ceiling lights

Si 4The circuit operates as follows: The 741 opamP is connected as a comparator. It compares the voltage at the emitter of the series pass transistor, which is applied to the non-inverting input, with that of the collector voltage, which is applied to the inverting input. The 5V6 zener diode keeps the voltage at the inverting input of the opamP 5.6 volts lower than that at the collector. The output of the opamp therefore triggers the thyristor every time . the front-en for power supplies Power supplies with high output currents, and specifically those with adjustable output voltage, pose a heavy load for the series regulator transistor due to the large amount of power dissiPation. This can be reduced by means of a simple additional circuit. Since the dissipation will be reduced, the size of the heatsink for the series transistor can also be made smaller, in fact, the rear of the case will quite often be sufficient. Furthermore, it is now possible to use a single transistor instead...