This circuit for SCR triggering using a neon lamp in a full wave system was found in a 1968 US documentation. No details of the pulse transformer were given.
We found this circuit in a 1987 documentation, but it can still be easily assembled. Its output must...
This circuit that emits siren sound can be used in a fire alarm. We found it in an old American...
Found elsewhere in this section, this circuit is from the April 1971 Radio Electronics magazine. Note...