This circuit was found in a 1964 Electronic Design. The circuit makes use of transistors of the time. Current equivalent transistors may be experienced.
I found this circuit in a doc umentation from the year 1968. It uses germanium transistor and has...
This circuit produces sounds that depend on the measured voltage and that can be compared with a...
This circuit was found in American documentation from the 90s. It serves as an amplifier for a...