This circuit is from a 1974 publication by Motorola. The unijunction may be 2N2646 and bipolar BC558 and BC548. The pulse duration depends on the capacitor.
This windshield wiper timer was obtained in an 80's Hands On. The transistor can be the BC548 and...
This is one of the first solid state laser projects. It was found in the June 1972 issue of Radio...
This circuit is from recent English documentation appearing in similar versions elsewhere on this...