VLF Oscillator (CB21139E)

This very low frequency oscillator was found in a Popular Electronics from the 90s. The circuit supports equivalent transistors.

50 W amplifier (CB16700E)
This 1992 circuit uses an integrated circuit not common today. The Sanyo integrated circuit must...
Digital Watch MA1010 (CB19859E)
This was one of the National Semiconductor clock modules very popular in the 70s and 80s. In the...
D - A Converter (CB16016E)
This digital / analog converter shield is suggested by MOTOROLA and is based on an operational amplifier...