This circuit is from an 80's publication. It makes use of small 6 V x 50 mA incandescent lamps. The diodes can be general purpose or even 1N4002. The transformer is 6.3 V with 100 mA or more current.
This circuit is from a 1977 publication for radio amateurs presenting a crowbar protection. The...
Found in a 1965 Motorola documentation, this circuit uses a neon lamp as a trigger element. The SCR...
Twin-T oscillators can be used to produce sinusoidal signals in the audio track with good...