The figure shows how to implement an alarm buzzer in an LM3914 to warn about crossing the scale limit. The circuit can use other types of warning.
In the proposed circuit, each pulse of light or infrared radiation that hits the photodiode...
This circuit with the CK722 has a small range. We found it in Radio Electronics magazine from...
We found this circuit in a 1972 publication. The circuit is indicated for the application of TTL...