Time Base (CB25100E)

This time base circuit was found in the January 1988 issue of Radio Electronics magazine. The output signals are 1 Hz and 10 Hz TTL.

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Mini Electronic Organ (CB4392E)
This simple musical instrument was obtained from a 1967 magazine. If the original transistors are...
Simple voltage-controlled oscillator (CB20602E)
The transistor of this circuit can be the BC558. The circuit is from an old documentation...
Reflected Power Adapter and Monitor CW (CB3884E)
We found this circuit in an old American documentation for hams. The circuit serves as a telegraph...