Found in an Electronics World of 1968 this circuit can use current SCRs and the diodes are according to the lamp. The Circuit only works with incandescent lamps.
This shoot-to-target game uses well-known CMOS circuits and the player hits the LED by squeezing...
This is one of the many versions of this type of indicator that the reader can find on our...
This circuit is from an old American amateur radio manual. The circuit shows how to use a Varicap...