This LED diode test is suggested by the Texas Instruments optoelectronics manual. The transformer current can be between 50 mA and 300 mA and the voltage between 6 and 9 V.
Based on an Analog Devices LTC1540, this circuit consumes only 50 uA, serving to monitor the...
This circuit should be placed between a turntable and recorder or playback media from the input to...
This very low voltage regulator for 3 V input (2 batteries) was obtained in a documentation from...