We found this circuit in a 1986 documentation. It uses only LEDs, batteries, resistors and the power supply which can consist of 4 batteries or a 9V battery. The basic circuit uses two-color LEDs.
This two transistor audio amplifier stage was found in a publication of the year 1968. The...
Found in documentation from the 1980s, this circuit makes use of discrete components of the time....
The circuit presented is from a 2006 documentation. It can turn a set of lamps on or off when...