VFD for single phase induction motor?

Started by Anonymous in sci.electronics.basics1 month ago 2 replies

Is this possible? I have a customer, a glass artist, who uses several very nice but old glass grinding machines. There are only 4 speeds...

Is this possible? I have a customer, a glass artist, who uses several very nice but old glass grinding machines. There are only 4 speeds on these machines and he would really like more speeds. He has a newer machine with a VFD on it and asked me how he could get the same thing on his old machines. I told him he really needs to change motors to 3 phase. But he is loathe to do that. I can see w...


mechanics of materials james gere 5th edition

Started by Anonymous in sci.electronics.basics1 month ago

solutions.for.student@hotmail.com s o l u t i o n s . f o r . s t u d e n t @ h o t m a i l . c o m...

solutions.for.student@hotmail.com s o l u t i o n s . f o r . s t u d e n t @ h o t m a i l . c o m solutions(dot)for(dot)student(at)hotmail.com We're a team found for providing solution manuals to help students in their study. We sell the books in a soft copy, PDF format. We will do our best to find any book or solution manual for you. Before purchase, we


Mechanics of Fluids , By Victor Streeter , 9th ed

Started by Anonymous in sci.electronics.basics1 month ago

solutions book team s o l u t i o n s m a n u a l t e a m @ h o t m a i l . c o m solutionsmanualteam(at)hotmail(dot)com...

solutions book team s o l u t i o n s m a n u a l t e a m @ h o t m a i l . c o m solutionsmanualteam(at)hotmail(dot)com solutionsmanualteam@hotmail.com We're a team for providing solution manuals to help students in their study. We sell the books in a soft copy, PDF format. We will find any book or solution manual for you. Just email us: s o l u t i o n s


Transformerless Power Supply

Started by amdx in sci.electronics.basics2 months ago 10 replies

Is it reasonable/possible to build an 8 amp 20 V transformerless power supply from a 120Vac line. I calculate about 180uf plus or minus...

Is it reasonable/possible to build an 8 amp 20 V transformerless power supply from a 120Vac line. I calculate about 180uf plus or minus depending on other components. Maybe 9- 20uf caps in parallel? I'd like to build it into a leaf blower. All plastic, absolutely no metal exposed. I think I've answered my question, I have 12, X rated caps in my junk box, but they are only...


Simplest, cleanest, push button debouncer?

Started by Terry Pinnell in sci.electronics.basics2 months ago 19 replies

Is there any consensus on the neatest circuit to take a noisy push button signal and output a clean rectangular pulse? Searching through my...

Is there any consensus on the neatest circuit to take a noisy push button signal and output a clean rectangular pulse? Searching through my ancient (paper) files I found dozens, but my scribbled notes on many show that when tested I'd found lots failed, allowing some noise to reach the output. My starting assumption is a simple CR filter in front of a Schmitt. But before I head for the shed...


Are self-driving cars also a kind of robots?

Started by Mr. Man-wai Chang in sci.electronics.basics2 months ago 12 replies

Are self-driving cars also a kind of robots? -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity...

Are self-driving cars also a kind of robots? -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 ???! ???! ???! ???! ???! ???! ???! ???! ????? (CSSA): http://www.swd.gov.hk/tc/index/s


Ampacity of 18 gauge wire

Started by Andy in sci.electronics.basics2 months ago 13 replies

I looked at an ampacity table but it was confusing. Would a 4 ft. length of 18 AWG wire be ok for a 10 amp load.? (Circular saw) Thanks, ...

I looked at an ampacity table but it was confusing. Would a 4 ft. length of 18 AWG wire be ok for a 10 amp load.? (Circular saw) Thanks, Andy


Pulse from >3 pulses in 5s?

Started by Terry Pinnell in sci.electronics.basics2 months ago 3 replies

My (infra-red) Remote Control unit, made some 25 years ago, uses this 12 button remote to control a variety of stuff in and outside the...

My (infra-red) Remote Control unit, made some 25 years ago, uses this 12 button remote to control a variety of stuff in and outside the house. https://www.dropbox.com/s/0ixidgxjkr7nh1s/20180909-RC-Unit-1.jpg?raw=1 I want to add a new function: toggling a security light near my shed workshop. Although I have a couple of buttons still unused, I want to avoid the hassle of fresh wiring and hol...


Short +ve pulses, simplest solution?

Started by Terry Pinnell in sci.electronics.basics2 months ago 11 replies

The curtain controller I made about 12 years ago toggles the curtains to open or close on pressing a momentary push button. For holidays...

The curtain controller I made about 12 years ago toggles the curtains to open or close on pressing a momentary push button. For holidays I improvised a circuit based on an LDR inside one of those old mechanical mains-operated timers. The LDR is flush up against its neon light. That part of my circuit has recently stopped working and I've started work on it. But meanwhile I'd welcome suggestio...


How to tell speaker + from -?

Started by Anonymous in sci.electronics.basics2 months ago 7 replies

In my shop I have a a Pioneer SX-434 radio/amp for my listening pleasure. The speakers are mounted high up, screwed to the wall, and are not...

In my shop I have a a Pioneer SX-434 radio/amp for my listening pleasure. The speakers are mounted high up, screwed to the wall, and are not easy to get at. I had to disconnect the speaker wires temporarily from the stereo and stupidly didn't mark the wires for positive and negative. Is there a way to tell which wires are which that doesn't involve ladders and me unscrewing the speakers from...


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