Recent content by Ernie

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    Led Driver?

    Ernie whizzes a spitwad at the chalk board and when Mr. Owen turns to look he points at Viren hehehe...j/k guys Ernie
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    Transistor based Step Up Circuits

    Re: Transistor based Step Up Circuits IT WORKED !! Here is a thread containing the Brinkmann schematic: http://www.candlepowerforums.com/ubbthreads/showflat.php?Cat=&Number=662251&page=0&view=collapsed&sb=5&o=365&fpart=1 Hope that works right. Ernie
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    CPF University - EE Course - Class in session!

    Another great lesson MrAl.Thanks for the hard work putting it together for us. Ernie
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    Hamster Powered Light.....Where are we Going ???

    Oh my,I better not let my son see this... Ernie
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    Light detector switch?

    Hi MrAl, I tried to find that LP339 locally but had no luck.I saw it at digikey though and since I have a couple other things I need to buy from them I will order a couple. Although the light detector part of this circuit seems perfect to me.It's been going on and off for a few days at pretty...
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    Light detector switch?

    MrAl, This time I have a different reading.I have .180 across the collector and emitter of Q2 while it's on.I charged the batteries to full before taking the reading also.The last time I said 1.5v but that was when it was in the off mode and the batteries were low too. What should the reading...
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    Light detector switch?

    Hi MrAl, I think I did it the correct way.I measured between the collector and emitter on q1 and got a reading of 1.5v.Is this the right points to check? Thanks Ernie
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    Light detector switch?

    Hi Everyone, After letting it go for a couple days and tinkering with different resistors for my light conditions I got it to go on and off just perfect for where I'm going to put it.The value for me ended up being 10k. The only drawback is it's not very bright for long.I'm not sure how to fix...
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    Light detector switch?

    Just to let you know MrAl I breadboarded this circuit tonight and it works very well from what I can see.It's bright right now with a fresh set of nimh.I haven't had a chance to see exactly what light level will switch it yet though. Ernie
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    Light detector switch?

    Wow MrAl I can't wait to have a go at this.Once I get a place to store files I'll post a picture of my little light this is going to be used on. Ernie
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    Light detector switch?

    Well looks like my wife took matters into her own hands and bought a nightlight lol. That's ok though because I'm not quitting until I finish making one myself.Except now I'll use it for a outside light or something. So after doing some reading and gaining a little more understanding I can see...
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    Light detector switch?

    Hi everyone, OK I wired it the way you said MrAl,putting the 1.2k resistor in there.The circuit seems a little bit less bright but not by much.On the measurement you asked me to get between the collector and emitter for some reason I could not get any reading on my DMM.Is it possibly to low for...
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    Light detector switch?

    Hi MrAl, I did what you asked and measured the photoresistor.In the level of darkness I would want it to come on the resistance measured 32k.In the level of light I would want it off the resistance was harder to measure but I got around 1.2k. I don't know if this is a CDS like you asked.I'm...
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    Light detector switch?

    I'm having trouble computing the resistor needed to control the amount going into the base on the light switch transistor.I have a 2.4v supply(2aa nimh) and then I'm driving 3 LED's in parallel using the same circuit as Viren.I think I read someplace it's the same as the Brinkmann but I'm not...
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    Light detector switch?

    I tried it using a generic Transistor I had laying around.I think it's a 2n2222.Anyway it switches on and off from light to dark but the output is really dim now.Compared to the same setup without the dark switch.I guess I'm not applying enough power to the base of the transistor? Maybe I...
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