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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Thanks for info - reading material was helpful - I had to modify the wiring schematics to work at 110 VAC - component list given is for 220 VAC - component values have to be adjusted - I have a lot of 1. 5 mm enameled wire at my disposal - thermocouples are available in my parts bin - I am...
Understood completely,
Going to (at the least):
Increase length of wire to 540 m (6.1 ohms)
number of turns to 270
corresponding current draw of 16 amps (using 100 VDC from rectifier)- which is manageable on a low duty cycle with a timer circuit.
I think I have a better plan now for making my electromagnet - I will ditch the DC power supplies and go with 110 VAC rectified to 100 VDC.
I verified the length of my 1 kg of 1.5 mm diameter enameled copper wire - comes to around 60 m - in hindsight I should have made better calculations but...
Hi there,
Thanks for the advice.
Yes, 1.5 mm diameter enameled copper wire - quite thick stuff - from aliexpress.
I tried measuring the resistance of the wire with my multimeter but it was too low to be sure if it was reading properly.
Here's a thought:
What if I cut the 60 meter wire into...
Hi there,
I am building an electromagnet to work in my workshop to secure steel parts during fabrication.
I did some research on electromagnets and bought some supplies - I understand that current is more important to magnetizing ferromagnetic materials than voltage.
I have 60 meters of 1.5...
I've soldered together two identical circuits similar to the drawing attached.
**broken link removed**
I made a few modifications to the circuit to reset the 4017 counter and 555 counting on startup - these mods work fine.
I also have the output from the 4017 counter flipping a relay...
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