|Joined: ||Jan 27th, 2017|
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|Ok. 40AWG wire on a 25mm x 8mm bobbin will give you exactly 501 ohms with 5000 turns. I too was confused with the 5,000 ohm spec, since there was no way you could make that even with 43AWG wire in such a small bobbin.
The wire gauge of 12V automotive relays is approx 40AWG yep.
You might well get some results by simply wiring 2 relays together !
On the bottom of such relays, there are normally 2 pins on one end and 4 on the other. The 2 pins are the coil, the 4 are the contacts that open and close.
So the method would be to wire the 2 pins oppositely of each other.
The cases do come away quite readily, although normally in many pieces. It's a thin brittle plastic. Pliers can be used to crack the plastic (at the 4 pin contacts end) then the plastic will crack apart.