This circuit was found in an article in Electronics Now magazine from March 1997. The transistors are general purpose, and the indicator is a 1 mA full scale analog type.
The frequency of this oscillator depends on the amount of light incident on the LDR. The circuit,...
This circuit divides the frequency of a signal by two. The circuit is found in the May 1977 issue...
We found this circuit in the Texas Instruments opto-electronics manual. The button resets and the...