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.
This circuit was found in an old TTL circuit manual. The circuit must be powered by 5V, and the...
This amplifier for biological research was found in an Electronic Design from 1964. The...
Found in National Semiconductor publication from the 1980s. This gain-100 circuit can be...