This circuit is from an1966 General Electric documentation. The Triac can be equivalent to 6 A or more, mounted on a good heatsink. Any diac can be used.
Found in a 1990s US publication, this alarm circuit detects when a light beam is interrupted. Optical...
This circuit came out at a Wireless World in January 2000. The circuit can be easily assembled as it uses...
This voltage regulator circuit has 1 A of maximum current for a TIP32 and 500 mA for a BD136. The...