schmidtbag
- Nov 8, 2012
- 36
- Joined
- Nov 8, 2012
- Messages
- 36
So I've followed the following guide:
http://www.instructables.com/id/Sup...ino-/?&sort=ACTIVE&limit=40&offset=40#DISCUSS
But used 24v motors, which means I need stronger parts. For the transistors I have NTD5867NL and for the relay I have 845HN-2C-S. Everything works, except the fact that the transistors don't have built-in diodes and therefore don't stop EMF from blowing up the transistors. So, I have the 80SQ045NG diodes.
The problem is, I don't know where to put the diodes. I've tried to set it up like this:
http://www.instructables.com/files/deriv/F9L/KDFG/GU7FXUMH/F9LKDFGGU7FXUMH.MEDIUM.jpg
which killed my transistor.
I tried putting the anode toward the collector and the cathode toward the voltage source, which seemed to immediately kill my transistor. I tried reversing it and the transistor survived, but the EMF still killed it (I think, it doesn't work anymore anyway). So far i've mostly only been messing with the Enable transistor. I don't bother enabling the Direction transistor since that just increases my chances of ruining something else.
So, can anyone point out exactly what I'm supposed to do to make this work? I'm running out of transistors and my relay isn't liking the amount of soldering and desoldering I'm applying to it. I feel like this should be obvious but I don't want to get too experimental at such high wattages.
http://www.instructables.com/id/Sup...ino-/?&sort=ACTIVE&limit=40&offset=40#DISCUSS
But used 24v motors, which means I need stronger parts. For the transistors I have NTD5867NL and for the relay I have 845HN-2C-S. Everything works, except the fact that the transistors don't have built-in diodes and therefore don't stop EMF from blowing up the transistors. So, I have the 80SQ045NG diodes.
The problem is, I don't know where to put the diodes. I've tried to set it up like this:
http://www.instructables.com/files/deriv/F9L/KDFG/GU7FXUMH/F9LKDFGGU7FXUMH.MEDIUM.jpg
which killed my transistor.
I tried putting the anode toward the collector and the cathode toward the voltage source, which seemed to immediately kill my transistor. I tried reversing it and the transistor survived, but the EMF still killed it (I think, it doesn't work anymore anyway). So far i've mostly only been messing with the Enable transistor. I don't bother enabling the Direction transistor since that just increases my chances of ruining something else.
So, can anyone point out exactly what I'm supposed to do to make this work? I'm running out of transistors and my relay isn't liking the amount of soldering and desoldering I'm applying to it. I feel like this should be obvious but I don't want to get too experimental at such high wattages.
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