This TTL shield with high level logic is from the LM111's own 80's manual. The integrated circuit is no longer easily found, but the circuit can be adapted to use modern equivalent operational amplifiers.
This circuit is intended for charging 12 V Nicad batteries, which corresponds to 10 common...
This circuit for discharging NiCad batteries limits the current to a value that can be adjusted in the...
This current-limited circuit was found in a Popular Electronics from the 90's. ...