This circuit uses a capacitor that depends on the frequency of the crystal. We found it in a 1967 documentation. The maximum frequency is around 100 kHz.
This simple circuit uses only a transistor and a relay as basic components. The setting of the...
With this circuit, from Newton C. Braga's Mechatronics Sourcebook it is possible to control up to 5...
The presented circuit has compensation for cold junction. In addition to a voltage reference, it...