This electronic roulette circuit with 10 numbers was found in a Popular Electronics from the 80s. The circuit uses indicator LEDs and the transistors are general purpose.
This circuit emits a sound when a magnetic field, of a magnet, for example, approaches the sensor....
Featuring an 8 MHz passband, Texas Instruments TVS912A operational amplifiers can be found at...
ABB drives the energy revolution with newly emerging use of solar power in Singapore Land scarcity has...