Ac Light Dimmer And Fan Speed Controlled With Raspberry Pi

A raspberry pi enthusiast jeff geerling released a pretty cool video showing how to add a fan to the raspberry pi to help keep the temperature under control.

Ac light dimmer and fan speed controlled with raspberry pi.

Safe and simple ac pwm dimmer for arduino raspberry pi. Ac light dimming and fan control with raspberry pi i found this little handy ac dimmer module and wanted to test it out on a couple home automation projects i had. Link here 20 ish or best offer. Device can be controlled via variable resistor.

Controlling the ac devices is dangerous because we will be using the high voltage so before controlling the ac device we will control the dc device so that you have an idea of how the relay module is working. Sure a circuit that has a servo and an arm could be used to press buttons but that s a rather complex solution. He is using the servoblaster package to drive the servo motor with the raspberry pi. We will control the ac as well as dc device.

Dimmer with mosfet this circuit shows that dimmers intended for use at mains voltage do not always have to contain a triac. This way a noisy fan isn t running all the time. In this raspberry pi tutorial you are going to learn about raspberry pi relay control. Most domestic fans have different speed settings but these are often in the form of mechanical buttons which may be difficult to control using a raspberry pi.

Each can be set to their own speed and can control the fan based on which leg the relay is at. That project was pretty great but i wanted to take it to the next level and add the ability to only turn the fan on when needed by monitoring the core temperature. This item ssr ac light dimmer module controller board 50 60hz with heat sink 110v 230v compatible with arduino mcus and raspberry pi zero cross detection pwm ac voltage dimmer 50 60hz 80 240vac for arduino raspberry leading edge dimmer for ac motor pump fan light heater max 500w pro engineered onboard snubber circuit compatible worldwide. Compatible with any arduino raspberry and other mcu.

I imagine the circuit running through a dpdt relay to a the first variac which is set to low speed and back to the fan. By attaching a servo motor to the dimmer knob the rpi can adjust the light level without risk of electric shock.