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 has been obtained from a technical documentation on filters from 1977. The...
Three of the four gates found in a 4001 can be used to perform as an AND gate. This improvisation...
This circuit, from a 1987 documentation, is for the CB3817E transmitter. Connected to the handset...