Miller Solar engine + Joule Thief - Electronic Circuits Projects Diagrams Free

special_k · 18th February 2008, 01:36 AM

Hi I am new to the forums. I do not know exactly how to post this problem.
I had this nagging idea that I think would work. I read Make magazine and have built a lot of those projects. I was wondering if I could combine two projects. A symet and a joule thief. I have tried putting the joule thief before the capacitors after the capacitors.. Before the FLED still no luck.
The reason I want to do this is because the Symet only really moves in midday sunlight and is inactive through the other parts of the day.

**Krumlink** · 18th February 2008, 06:21 AM

Try just the solar panel?

If nothing try to put it where the motor is. Take the motor out.

special_k · 18th February 2008, 06:25 PM

I I tried that the motor will not turn. I think it is because the Joule thief circuit produces pulses of energy (50,000 or so a second). The solar cell only produces 2v so not have enough to turn the motor.
I also tried to have the Joule thief charge some capacitors. It doesn't charge them enough for the FLED activate and turn the motor.
Getting rid of the motor would kill the symet, it is supposed to move around in sunlight.

mvs sarma · 19th February 2008, 04:58 AM

On the other hand if you rectify the Joule thief output and filter by say 4.7uF/64V capacitor, the reultant DC would turn a motor connected with a limiting resistor in series.

special_k · 28th February 2008, 09:24 PM

help. can you point me to how I could do this or a Schematic

HarveyH42 · 28th February 2008, 11:50 PM

You do realize that the Joule thief raises the voltage, but you sacrifice current. Works fine for LEDs, 15-30mA is plenty. A pager motor might need a little more...

18th February 2008, 06:21 AM	(permalink)
Krumlink Moderator Blog Entries: 1	Try just the solar panel? If nothing try to put it where the motor is. Take the motor out. __________________ Visit my website! http://www.freewebs.com/electronic-hobbyist

19th February 2008, 04:58 AM	(permalink)
mvs sarma Experienced Member	On the other hand if you rectify the Joule thief output and filter by say 4.7uF/64V capacitor, the reultant DC would turn a motor connected with a limiting resistor in series. __________________ Regards, Sarma.

28th February 2008, 09:24 PM	(permalink)
special_k New Member	Schematic help. can you point me to how I could do this or a Schematic

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18th February 2008, 06:25 PM	(permalink)
special_k New Member	I I tried that the motor will not turn. I think it is because the Joule thief circuit produces pulses of energy (50,000 or so a second). The solar cell only produces 2v so not have enough to turn the motor. I also tried to have the Joule thief charge some capacitors. It doesn't charge them enough for the FLED activate and turn the motor. Getting rid of the motor would kill the symet, it is supposed to move around in sunlight.

28th February 2008, 11:50 PM	(permalink)
HarveyH42 Experienced Member	You do realize that the Joule thief raises the voltage, but you sacrifice current. Works fine for LEDs, 15-30mA is plenty. A pager motor might need a little more...