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Sure it can be done without ICs but do you have the time and patience to assemble all this? It wont be cheaper for sure.
This is only half the requirements; still need the 2 transistors latch on button and a 'one shot' monostable circuit.
Right, well they are switches for charging and discharging arranged to act as constant current source, what i meant by no constant current was the conventional current mirror, 2 transistors source/sink ect...
Just wanted to say, the circuit worked as expected. I built it on a perf board and installed it in my car. Added a 'relay on' LED as a charging indicator. My secondary were around 9V and there were no problem, no oscillation; nothing gets hot. I'm quite happy with it.
Radioshack charged me1.99...
Yes, this is another way of doing it, thanks for the idea but I don't think it would be simpler/easier than what I have. However, it would be an ideal input for a micro processor
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This would be a problem, thanks for pointing it out. I would have to add in some battery level...
I decided to install a dual battery system in my SUV since I have a spare battery laying around. I bought a PAC-80, 'battery isolator' they called it... Its just really is a solenoid/relay. I had it mounted, all wired up except for the triggering part. I don't want to have it wired to the...
FvM has been right all along. For the circuit to work, you will need some base bias resistors, the value of each base resistor must be atleast 10 times the load resistor
This could never be! Is this some kind of a joke? What kind of simulation software are you using? Forget about the other 2 transistor, just simulate one. See if you can manage to get it to turn on/off!
What seems to be the problem? Have you breadboarded the circuit? What do you mean by drawing...?
PS: You can get rid of R1, it is not needed, just connect switch to ground
Here is a little project I have been working on, to control brightness level of a color organ through a PWM driver via a smoothed low pass freq to voltage RC filter. The results were nice, I have built and tested the circuit on my discrete PWM driver. I could not smoothen the waveform any more...
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