This circuit was found in a 1965 General Electric manual. What it does is give a warning if you leave the vehicle with the headlights on or lights inside.
This step is also suitable for the AC188k and SK3004 transistors and was found in a 1980s...
This six-decade logarithmic current amplifier was found in a 2005 Linear Technology manual. The...
This circuit was found in a RE Experimenter Handbook from the 90's. The components are of the...