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Small Controller Offers Precise Control 
I have plenty of DC voltage controls, but I needed one that works with AC. This little board fits the ticket. It has two input and two output terminals. Each terminal has a clamp bar under the screw to keep bare wire in place. I connected the inputs to 115VAC and ran the output to a 300 w flood lamp. The potentiometer sweep was about 80% from full power (110v) down to barely glowing (16v). Control was very precise and smooth; there were no "jumps" or "spikes" in brightness. Next, I connected it to a 1500 w floor heater. The potentiometer sweep was only about 20-30% of the full dial range, but control of the fan speed was still very precise and I didn't notice any loss of power at full power. This seems to be a quality product, easy to connect, very precise, with firmly attached components and a smooth-turning control dial.
