This circuit was obtained in a 1964 Electronic Design. The transistors are from the era and the instrument is 100 uA full-scale.
The UAA170 integrated circuit is no longer common in our market. With it it is possible to...
This circuit that emits siren sound can be used in a fire alarm. We found it in an old American...
This double time constant circuit for resistive loads was found in documentation from the 1980s. The...