This circuit is from the 80's but uses common components today. The relay is voltage sensitive according to the power supply used. Transistors may be general purpose types.
September 2017 - This new integrated circuit, which facilitates the design of PWM dimmers, can now be...
This amplifier with the LM1098 and LM101 by Motorola from a 1990 manual can be designed with more...
This circuit was found in an old American documentation. The transformer is of the type found in...