Flash memory programming power source (CB9322E)

This circuit was found in Maxim's documentation from the 90's. The circuit provides 12 V x 120 mA.

LDL1117 1.2 A Voltage Regulator (ART337aE)
This voltage regulator from STMicroelectronics provides a 1,2 A current in the voltage range from...
Tachometer and opening angle meter (CB23639E)
Dwell meter is the English name given to the opening angle meters of old plated cars. We found this...
Phone circuit (CB8709E)
With this circuit, found in a 80s Popular Electronics, it is possible to use two ordinary phones in a...