Using a DAC038 IC this circuit is from Radio Electronics from May 1983. The circuit must be powered with a 5 V source and uses common operating outputs.
We found this circuit on the internet. The components are current, and the time depends on C1...
This circuit was found in an English publication of 1982. The operational can be replaced by an...
With this luminous remote control, which we found in a 1990 publication, using a flashlight you...