Found in a 1970s documentation, this mini-organ toy circuit makes use of an integrated circuit from that time. This component is difficult to obtain today.
The setting of this power supply is only 0.1%. We found it in a 1969 US documentation. Transistors...
This circuit is based on a common cathode 7-segment display. The circuit is based on CMOS...
The existence of field effect transistors at the input of the integrated circuit (operational...