We found this circuit in an 80's Radio Electronics. It can still be easily assembled as the used integrated circuit is still common. The circuit is powered by voltages from 9 to 12 V.
![](/images/stories/cir/225012502023_171250_0001.gif)
We found this circuit in an 80's Radio Electronics. It can still be easily assembled as the used integrated circuit is still common. The circuit is powered by voltages from 9 to 12 V.