This circuit is from a 1978 Texas Instruments optoelectronics manual. The trimpot adjusts the LED current. Other currents can be adjusted if they are within the capacity of the FET.
We found this circuit in a Electronics Hobbyst from 1977. The circuit is indicated to adapt the...
June 2017 - These new AVX capacitors are suitable for filter applications, considerably reducing...
This powerful pushbutton uses a power MOSFET. We found it in a Popular Electronics magazine from...