Found in a documentation from the 90's, this circuit uses only one integrated circuit. The resistors in series with the LEDs depend on the power that can be between 5 and 12 V.
This circuit was obtained in a 1982 English magazine. The purpose of this circuit is to make an...
This is a change from the previous interface, also used an uncommon operational one today. The...
This circuit uses a capacitor to momentarily reduce the anode-to-cathode voltage of the SCR for...