This circuit triggers a relay when the set temperature is reached. The circuit is from an old documentation. The relay may be equivalent according to the transformer secondary voltage.
The frequency of this oscillator depends on the crystal used. The transistors are general purpose. We...
You can measure capacitances across a large range of values using the AC Power line frequency as...
The circuit of the figure serves the same purpose as the previous one (CB5057E), but has a...