This circuit is from a 1974 Ferranti transistor manual. The circuit is analog, and the components used are period types.
This circuit uses a transistor as a sensor and operates in the range of 0 to 50º C. We found it in...
This circuit was found in a Poptronics of the 90's. The components can be changed to the desired...
In the figure we have an interesting protection bridge against power polarity inversion of a...