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 circuit was taken from the 1967 General Electric SCR Manual. The circuit can use virtually any...
This circuit can detect both light and shadow using an LDR as a sensor. We found the circuit in an...
This power supply for those who want to feed and recover 5 ¼ floppy disks was found in the...