Found in Philips' 90s documentation, this small source can use modern transistors like the BD135 for TR4 and the BC series for the rest.
This oscillator that operates at 80 kHz was found in the July 1993 issue of Electronics Now...
This circuit is from an Electronics Now, American magazine from December 1992. The magazine no...
This bistable touch sensitive must not be powered by a source without a transformer. The outputs can...