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1  Using Arduino / Motors, Mechanics, and Power / Zero-crossing or random turn-on SSR, to use with 220V heating element with PID? on: April 14, 2011, 08:24:49 pm

For a project, we (students) want to demonstrate the principle of PID to control the temperature of a room. Instead of using an entire room, we will make a "sample setup": namely a box with temperature sensor and a 220V AC heating element in it (probably coming from a hair dryer, or another home or kitchen appliance). And with a fan in it, to spread the temperature.

We will use an arduino, with the PID library, and we will connect that to a Solid State Relay (SSR).

However, it seems that we can use two types of solid state relays: zero-crossing or random turn-on... Which type should be chosen?

Thanks smiley
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