This simple alarm with thermostats circuit can be used on places where we must detect overheating. It uses 3 thermostats, and a one, 2 contact, relay
Transformerless Power Supply Circuit We will use a zener diode among other elements to acheive the Transformerless Power Supply circuit. This means that our power supply will give a limited range current value (it will be a maximum and a minimum posible current that the power supply circuit can deliver). This power suply must be permanently connected to the circuit as a whole […]
This rain detector using two transistors, is a simple circuit that aims to alert the beginning of the rainfall.
The applications for this circuit can be many, but the most obvious is to alert people who have their clothes drying under the sun or the wind, to put them under the roof before they get wet again.