Found in American documentation from the 90s, this circuit is ideal for wearables and can be powered by voltages that depend on the number of LEDs.
The code switch circuit with optical sensors shown in the figure was found in a 2000 Poptronics. The...
This control allows to start or stop a motor up to 3 or 4 A with a low intensity signal. The...
This series motor control circuit was obtained from an old manual from the 80's. The SCRs must be...