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 is from American documentation from the 90s. The configuration is very current and can...
This circuit trips when the voltage set in the pot is exceeded. The tone depends on C3 and...
This circuit uses only two general purpose transistors and can be powered by the circuit under...