Fuel Gauge (CB26016E)

This automotive circuit was found in the June 1997 issue of Electronis now magazine. The circuit uses a common operational amplifier powered by 12 V.

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Single Supply Function Generator (CB18996E)
We found this function generator with two FET operators in a 1996 Texas Instruments application manual....
8 Channel Encoder with 4017 (CB4530E)
This circuit was obtained from an English magazine from 1979, but can be easily assembled today...
Electronic Bell for Telephone (CB17982E)
The integrated circuit used in this 2002 project is not very common. It is powered directly by the...