We found this circuit in the Texas Instruments optoelectronics manual. Field effect transistors can be BF245 and bipolar BC548. The sensor is a photodiode in the photo-generator mode.
The purpose of this circuit is only to increase the input resistance of a multimeter, since there...
September 2017 - The new LDOs of STMIcroelectrinics LDLN025 for currents up to 250 mA and 1.5 to...
This circuit was found in the November 1987 Radio Electronics magazine. The trigger voltage is...