This 18 V x 300 mA power supply was found in a 1969 documentation. The integrated circuit is difficult to obtain today.
We found this circuit in a publication of 1991. The audio amplifier is an operational that admits...
This very low Power oscillator uses a neon lamp as active element. Frequency is given by C1 and...
This power source was found in a 1968 Electronics World. The transistors are from that time. The...