This circuit for voltmeter has an output of 1 V for 100 uA having been suggested by American publication of 1969. The transistors are general purpose types.
The integrated circuit used in this 80's application is not common today. However, modern...
This circuit makes use of the Linear Technology LT6100. We find it in a 2005 company manual. The...
This General Electric circuit produces pulses of light only when light stops shining on the...