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Thanks for replyNigel Goodwin said:Or use a far more complicated PWM charging scheme, this will reduce the amount of heat that needs dissipating.
But essentially laws are laws and you can't get round them, just 'fudge' them a little.
ataul said:Thanks for reply
yes i know pwm tecnique, but i have not any practical circuit diagrams,
I work with some pwm circuit but i can't manage it. current controling is easy but keep it constant with varying load is dificult. feed back voltage manage from shunt is another problem. so i looking for practical circuit diagrams. I know fundamental low but that is important for beginners!
best regurds
ataul.....
Hero999 said:If you want simple how about this electronic fuse circuit?
I know it's not the best solution but it's cheep and cheerful and if you're cleaver you can incorperate it into a simple voltage regulator
Nope.Styx said:isn't that just a crowbar cct
Hero999 said:Nope.
Hero999 said:Nope.
ataul,
This circuit acts like an electronic fuse, it's probably the easiest way to solve your problem it'll cut off the power when overloaded.
Yes you could go for a switching regulator but why do you need to, is there any particular reason you want a constant current source?
No it isn't, it's a resetable electronic fuse, you just disconnect and reconnect the load and it resets - D1 doesn't remain latched when the current's interrupted.Styx said:you could of just said it was a non-resetable electronic fuse
Hero999 said:No it isn't, it's a resetable electronic fuse, you just disconnect and reconnect the load and it resets - D1 doesn't remain latched when the current's interrupted.