the second coil of bahamut: Dabbling with Different Coils —

Quick bench test of several homemade coils on a pulse motor setup using 12 volts. One coil gave a violent magnetic jump but got scorching hot fast. Another with more turns stayed cooler and still produced strong response once positioned right. Papa Bale shares what he saw and what he'll change before adding reed switches.

Key takeaways

• One coil reacted violently to 12 volts on a ferrite magnet but heated up very quickly.
• A double coil with lots of turns stayed cooler once the loop issue was fixed.
• Proper floating position was needed for the magnet to jump cleanly.
• More turns can reduce heat while still giving usable magnetic pull.
• Reed switches and proper bearings are next for the full pulse motor.

Short and messy bench session testing whatever coils I had lying around. 12 volts straight to each one while sitting on a ferrite magnet. Some jumped like crazy, some got hot fast, and one needed a little coaxing. Nothing fancy, just real numbers from what I measured by hand.

Bench notes: First coil hit 12 volts and the magnet response was almost violent. Temperature climbed so fast I pulled the power. Second coil (double wound) ran cooler after I sorted the sticking loop. More turns seemed to help with heat while keeping the magnetic kick. Ready to wind a proper one now that I saw what works.

Support the channel if these pulse motor experiments help you. Every little bit lets me buy more wire and magnets.

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From the spoken experiment

The following notes stay close to what was said in the video about the second coil of bahamut:

> okay here we are into a short demonstration of that coil right there we're going to see how it reacts to having 12 volts and through it 12 volts of current resting on top of that ferrite for ferrite magnet but anyway let's throw the switch see what happens foreign look at that response it's like almost it's almost a violent response very volatile let's see oh it's hot it's really hot yeah okay we're gonna do the same demonstration foreign with this one little double right here and we'll see what happens it's going to be the same thing but we're going to see if it's as warm and there's this thing that I made and I don't think it's gonna work that's a lot of wire too we've got this little Loop that's sticking out I think that's what's doing it the current won't go through the whole thing and again it is a big spoon of wire so maybe we'll plug that into and we'll see what happens all right…

Builder checklist

• Confirm trigger/sensor timing before chasing higher voltage
• Watch heat on coils and transistors during longer runs
• Record voltage and behavior at each change (one variable at a time)

Related on this site

• Pulse motor resources & glossary
• Start here if you're new
• Back EMF guide
• How to build a pulse motor

Related on this site

• How to Wind Coils for a Pulse Motor (Step by Step) — Directly supports winding advice after seeing which coils performed best
• Best Wire Gauge for Pulse Motor Coils (AWG Guide) — Helps choose gauge after heat differences observed at 12 volts
• I Finally Got My Pulse Motor Running (Reed Switch) — Follow-up video the creator references at the end of this test
• DIY Low Cost Pulse Motor Build with 16AWG Coil — Similar low-cost coil approach shown in related video

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*Generated from video transcript (hash `069909958c5c…`).*