This circuit uses a transistor as a sensor and operates in the range of 0 to 50º C. We found it in old documentation. Operational equivalents can be used.
This circuit was obtained in an American publication of 1970, making use of components of the...
This is the common configuration for a 1 MHz crystal oscillator with a 7400. The circuit can...
This H bridge circuit can use medium power transistors up to 500 mA like BD135 and BD136 or for 2 A...