Optical sensor for PC (CB20548E)

This circuit was found in a PC documentation from 1996. It can be used as a shield with modern microcontrollers.

Laser Diode Modulator (CB4850E)
This circuit allows modulating a laser diode with low frequency signals. The integrated circuit...
Gain 100 with the 741 (CB902E)
This AC amplifier using the 741 operational amplifier uses a dual supply from 5 to 12 V. The input...
AC Phototransistor (CIR812E)
This circuit is suggested by the Optoelectronics Sourcebook by Texas Instruments when AC signals...