Originally posted by gyula
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Cheers mate,
I feel like a retard after reading your post The pull-up resistor is exactly what I should have realised I needed. Anyway.
I setup the circuit as per my second schematic and used a 300V, 100MFD capacitor as opposed to a nichrome coil. I used a 12V, 5 watt energy saving fluorescent light as the load. The circuit is setup to generate a 980 Hz signal. The initial results are interesting.
My power supply puts out 13.4V, and when the bulb is connected directly to it the meter reads 405ma (5.42W). When the bulb is placed in the circuit the voltage across the bulb is 11.4V and the circuit as a whole is drawing 240ma (2.73W).
I am able to adjust the output voltage of my power supply so I connected the bulb back up to it directly and lowered the voltage to 11.4V and the meter read a draw of 300ma (3.42W).
So it seams that using this circuit allows the bulb to draw 0.69W less than without it. As you can imagine I am eagerly awaiting the arrival of my enameled nichrome wire. I'm not sure what to expect but you never know.
Cheers,
Steve
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