Photo Detector Temperature Compensated (CB807E)

This circuit was found the Optoelectronics Sourcebook by Texas Instruments. Any phototransistor can be used and current drain is very low.

CPT212B and CPT213B Capacitive Touch Sensors
August 2017 - The TouchXpress CPT212B and CPT213B capacitive sensors from Silicon Labs can now be...
AP7380 Regulators ULDO
July 2017 - Diodes Incorporated's ultra low voltage drop voltage (ULDO) AP7380 regulators can now...
MOSFET Electroscope 3N128 (CB852E)
This sensitive electroscope uses a MOSFET 3N128 and can detect electrostatic charges of objects....