Pulsing Relay
In this project, the objective is to control a CPU fan through a relay mechanism activated by a stretch sensor. The stretch sensor is designed to detect changes in length or tension, which can be utilized to trigger the relay and subsequently turn the CPU fan on or off based on the sensor's readings.
The fundamental components of the circuit include the stretch sensor, a relay module, a power supply, and the CPU fan itself. The stretch sensor typically operates on a variable resistance principle, changing its resistance based on the amount of stretch applied. This change in resistance can be translated into a voltage signal, which is then fed into a microcontroller or a comparator circuit to determine when to activate the relay.
When the stretch sensor is not connected, the circuit may exhibit unintended pulsing behavior due to floating inputs or noise in the signal. To mitigate this, it is advisable to implement a pull-down resistor on the input of the relay control pin to ensure a stable low state when the sensor is disconnected. This will help prevent the relay from activating erratically.
Once the stretch sensor is connected, it should be calibrated to ensure that the relay activates at the desired stretch threshold. The relay will act as a switch, allowing the CPU fan to receive power only when the stretch sensor indicates that the specified condition has been met.
In summary, this project involves integrating a stretch sensor with a relay to control a CPU fan, with careful consideration given to circuit stability and sensor calibration to achieve the desired functionality.Hi Parallax people, just joined the forum. I`m trying to control a CPU fan with a relay triggered by a stretch sensor. I have my circuit set up like this. Right now the stretch sensor isn`t attached, however when I power the circuit it just pulses like in this.. 🔗 External reference
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