Re: [DorkbotPDX blabber] Digest for dorkbotpdx-blabber@googlegroups.com - 1 update in 1 topic

[Gunter Hausfrau]

Whoop! It never occurred to me to look at hobo fright (I actually do by quite a bit from them, there is a time and a place). I'll go and gather there. I really appreciate the help.

off topic. I had a friend pass away and I mostly cleaned out his shop. He was into electronics and did some hobby robotics a good bit ago. Do you think a place like ctrl-H would want random gears, motors, various bits and bobs? I'd rather it go someplace that it would be useful and appreciated than either stored in my shop until it is the grandkids problem or off to the dump.

 

On Fri, Nov 21, 2025 at 12:11 AM <dorkbotpd...@googlegroups.com> wrote:

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• DIAC question - 1 Update

DIAC question

Jerry Biehler <jerry....@gmail.com>: Nov 20 09:29AM -0800 The vacuum cleaner motor is a universal wound motor and can be controlled using a router speed controller from   Harbor freight.   The other one can be controller through a bathroom fan speed controller or something like that.   Different motors will need different speed control solutions.   -Jerry   On Nov 19, 2025, at 4:07 PM, gunterh...@gmail.com wrote:   I have a couple of blowers that I want to control. The simplest way that they are often controlled is by a blast gate, which often works well for this application. I'd like to try the variable speed route (for reasons). One of my portable forges is built from scrap, random parts, car wheel, old pipe fittings, etc . The blower is from an old vacuum cleaner. It was originally controlled by a ceiling fan speed controller but that seems to be less "controller" than it once was. I didn't build this, a friend did and I inherited it when he passed. There are commercial versions of speed controllers that I could get for not too much, likely less that it would cost me to build, but buying things is for suckers. The other not-so-portable forge has a small squirrel cage blower. Looking at similar online they spec at 1/70 HP, so not much.   I'd like to say that I'm better with DC low voltage/digital stuff, but I do have more experience failing with those than I do with AC mains.   Thanks.   On Thursday, November 6, 2025 at 4:41:57 PM UTC-8 Jerry Biehler wrote:   Just looked at the circuit. That's… something. What kind of blower do you have?   -Jerry   On Nov 6, 2025, at 4:38 PM, Jerry Biehler <jerry....@gmail.com> wrote:   Ahh. DIACs. First ran into a schematic that needed one in the 80s when I was kid. Very uncommon even back then.   I'd personally look at a single phase output VFD. They make them for fractional HP single phase motors.   DigiKey or mouser is where I order from. About the same service between them.   -Jerry   On Nov 6, 2025, at 12:19 PM, gunterh...@gmail.com wrote:   It has been a few minutes since I was "active" (like ~8152380 minutes, but who's counting)   I am working on putting together a simple AC motor speed controller for a blower on a coal forge (blacksmithing). I've found a few circuits that may work.   A couple of questions. DIACs. I'm not familiar with them. The circuits that I've found just say "DB3 DIAC" is there more to spec out?   I'm looking at something like this   https://drive.google.com/file/d/1Q6AmzJralQQyKOZZ-AdcMVTbjqM0PKkL/view   The other question is who do you get parts from now a days? I've ordered from mouser in the past, but much prefer if I can get local. Surplus Gizmos doesn't have everything that I "need" so am thinking I need to order, but unsure who from anymore.   Thanks.   Dan.   --   You received this message because you are subscribed to the Google Groups "dorkbotpdx-blabber" group.   To unsubscribe from this group and stop receiving emails from it, send an email to dorkbotpdx-blab...@googlegroups.com.   To view this discussion visit https://groups.google.com/d/msgid/dorkbotpdx-blabber/0d5a071c-b96c-4140-a457-2b24ce6a98f4n%40googlegroups.com.   --   You received this message because you are subscribed to the Google Groups "dorkbotpdx-blabber" group.   To unsubscribe from this group and stop receiving emails from it, send an email to dorkbotpdx-blab...@googlegroups.com.   To view this discussion visit https://groups.google.com/d/msgid/dorkbotpdx-blabber/ebb0669a-b071-4cb0-ad06-c4b683e90e08n%40googlegroups.com.

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