This circuit makes an incandescent lamp blink in order to vary its brightness with a candle effect. The circuit is from an old Popular Electronics, but the components used are current.
This simple metronome, from 1985 documentation uses only transistors and has two settings. For...
This circuit is suitable for modulating AM transmitters. The circuit is from a 1977 radio amateur...
This flasher was found in an old Hands On, but uses common components. The optocoupler can be...