This circuit was found in an Electronics World of 1968. The transistor can be any general purpose and the double T must be set to R3 for the desired effect.
This circuit was found in the July 1993 issue of Radio Electronics magazine. Based on an AD532, it...
We found this circuit in an 80's manual. The same configuration can be adapted to make use of...
The TSC102 integrated circuit from ST-Microelectronics consists of a current sensor system that, in...