Using the 2N2646 this circuit was found in a Radio Electronics magazine from July 1968. The transistors are from the time and the lamp can be replaced by a high-power LED in a current version.
The I2C EERAM Memory is a Low - Cost NVSRAM that Eliminates the Need for an External Battery to...
This circuit for incandescent lamps was found in the February 1972 Radio Electronics magazine. The triac is...
This circuit uses a diode as a sensor, activating a relay when a certain temperature is reached. The...