This circuit of starting lights for auto-race was found in an English documentation from the 80's. The LEDs must be of different colors, for greater realism.
This useful benchtop power supply uses a single LM350 integrated circuit as a regulator. The...
This circuit is for the system that has the receiver CB17134E. The emitting LED must be installed in a...
This circuit generates signals that depend on Ct and the 10k trimpot adjustment. See the math...