would it be possible to have something that is on when the voltage is below, say 14v and... and it'll turn itself off when the voltage goes beyond 14v.
It'll act like a switch... so I can maintain a 14v charging... and when it's beyond 14v It'll just turn itself off... so I won't need to dissipate heat.
It's possible, but probably NOT a good idea, leaving the alternator disconnected may produce too high voltages? - in my experience such systems have always shunt regulated, presumably there's a good reason for doing so?.
It's possible, but probably NOT a good idea, leaving the alternator disconnected may produce too high voltages? - in my experience such systems have always shunt regulated, presumably there's a good reason for doing so?.
hmm... I'm not removing the original regulator... I'll just tap it... parallel to the original regulator hehe...
I've got myself a decent heatsink and a fan... I'm now going to test it live in my bike hehe... hopefully i won't need the active cooling.
looking forward, what do i need to do to make a transistor normally conducting, and it will stop conducting at a certain voltage? would that be possible.
i've implemented it.. with the heatsink, it seems to be able to handle the heat... but I've fried 6 transistors in the process... when the voltage reaches around 25v-28v It kills the transistors...
I did not connect it to the battery yet, I was just testing it if it would be able to control the voltage. I was afraid that if I connect it to the battery and the voltage shoots up, it might damage the fuel gauge and other devices connected to that line.
Like I said, why are you getting 25V?, the zener and transistor should limit it to 13.8V or so - but it's certainly going to take a hammering without the battery connected, it's there to take the excess, not to take the full output of the alternator.
i've been reviewing my implementation, and the only thing that seems to be wrong is the resistor. i think the resister is a pulldown resistor so, if it's not connected the circuit will still work right?
I'm really sorry, I'm not ignoring your question but , I simply do not know how to answer your question. I really have no idea how the circuit works, you actually designed the circuit.
I've reviewed everything.. and I really have no idea why I get 25v... that is why I can not answer that question, all I can do is try to review my implementation.
I don't know why I get voltages far beyond the zener diode's rating.
You need voltage readings from all the component junctions, so we know what's wrong - as I said, you can't have 25V unless somethign is seriously wrong. It would also be handy to know what is failing, and in what way?.
i got myself 3 more 2n3055s I'm guessing that the transistor needs protection diodes...