Voltage regulator (T455E)

This positive feedback voltage regulator was found in the 1950s MIT documentation. The circuit allows you to adjust the output voltage.

Li Ion Charger (CB5411E)
This charger makes use of the LTC4026. We found it in a 2005 Linear Technology publication. The circuit...
5 V Suqare Calibrator (CB5348E)
This circuit was found in the National component manual which is not currently simple to obtain....
AC Amplifier Using the 741 (MSB038E)
In the circuit shown by figure 1, a10 mV AC signal applied to the input produces a 1 V signal in...