This circuit, found in 1993 documentation, is the traditional relaxation oscillator configuration with unijunction transistor. The frequency depends on C and the resistance value R.
This circuit uses a common diode as sensor. The output goes from 0 to 10 V with the temperature change in...
This circuit allows you to read resistors up to 20 M ohms, converting it into voltage. The circuit is...
Found in 90s Radio Electronics, this circuit is indicated for reading temperatures below zero....