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You are totally right, no need to be sorry for that. It was late and I was lost. After a good night of sleep, I solved the problem.
The voltage sufficed.
As it turned out, the solder of the control line became lose, so the signal didn't put much power through. I fixed that and now everything...
I tested the relay and it doesn't work as intended. Apparently, the control signal is too weak to flip the relay, although it outputs around 6V. So I tried to use a TIP120 (I have no other spare transistor or MOSFET right now), but it also won't really work with that. Either the relay is always...
You lead, I followed and bought this one. A flyback diode is a good idea!
Is there anything I have to consider when wiring the relay (not considering the diode) ? Do I have to connect A1 AND A2 to my control signal?
No problem! My control signal would be around 6V or 1.5V, so this is not feasable for me. Could you point me to one at farnell which is able to switch either 5V or 12V and which allows to be controlled at either 6V or 1.5V (on) and ~0V (off) with one control signal. I am at a loss here...
ok, so I will opt for another solution then.
I'm about to head out to a meeting so I can't produce a schematic for you right now but what I visualize is two PNP and two NPN transistors in a bridge configuration and one additional NPN transistor working as an inverter. Basically, the mechanism...
I have both 5V and 12V available in my circuit. So if I used 12V and extrapolate its curve for "ON-RESISTANCE vs. VA, VB (SINGLE SUPPLY)", I propably end up in the ranges of 170 Ohms. That would allow for a current of 0.07 Amps, which would still be a little too low, or am I wrong?
Heat would be...
That sounds reasonable, yes. But what about the MAX4527 - wouldn't this work, too? I already ordered it yesterday and wonder what difference it would make in contrast to your suggestions. If I understand its properties correctly, I don't need any external components with that IC, no?
It doesn't appear to move when no current is applied and I shake it a little, but maybe I just didn't shake it hard enough (and I won't try to). Anyways, I measured 44.8 Ohms.
Please consider me a newcomer to electronics. I know how resistors and capacitors work and that I can switch things with a transistor / mosfet / relay. Everything more complex is not part of my knowledge (yet).
The current in play is neglegible: if you look up ebay item 261942451810 you will...
1) I use a low power device which will switch (and stay) into one state when 3-12V is applied to it and switch (and stay) into another state if 3-12V is applied to it in reverse polarity.
2) I have one control output which will be able to supply 0V (off) or either 1.5/5.5V (on).
Now I need to...
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