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 Japanese commercial medium and short-wave radio uses 7 transistors and tunes the range from...
This control circuit for incandescent lamps was found in a publication from the 90s. The circuit uses...
This transmitter with counterphase oscillator was obtained in a documentation from the 90s. The...