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The most recent discussions

Re: OT. Antenna tester

December 11, 2019, 11:41 pm

@mid.individual.net: Pretty smart little presentation sheet. Cool job. Read more »

Jacobs ladder variable frequency and duty cycle effects

December 3, 2019, 8:46 pm

https://www.youtube.com/watch?v=Uh_Df8tsH4M Jacobs ladder and the effects of frequency and duty cycle. -- We all have dreams. Is yours worth pursuing? Read more »

Jacobs ladder in the dark

December 3, 2019, 8:46 pm

https://www.youtube.com/watch?v=Ll8guReWvFQ Jacobs ladder in the dark -- 'Such is life' - Ned Kelly's last words upon being hanged Read more »

High voltage demonstration

October 29, 2019, 6:09 am

This is a high voltage demonstration using an inexpensive car ignition coil being driven by a variable frequency, duty cycle and amplitude 555 based mosfet circuit. Circuit schematic: https://w... Read more »

(OT) AnonCoward - My home brew circuit; an adjustable coil driver

October 29, 2019, 4:36 am

Here's my video: https://youtu.be/KcWrrlTRFdM And this is the schematic to my circuit: https://www.imgpaste.net/image/r0yOs http://al.howardknight.net/?ID=157172565900 Now take a look at t... Read more »

Where do you source 35 Amp 220VAC circuit breakers that are NOT in typical ...

  [ 2 ]
October 27, 2019, 9:08 pm

Where do you source circuit breakers that are NOT in typical box stores? o Carling AA3-B0-24-635-5D1-C (do you have a decoder for that number?) PG&E has currently cut the power to us in California ... Read more »

Re: Left-wing socialism so good...PG&E Imposes New Power Shutoffs In Pa...

October 24, 2019, 4:32 am

On Thu, 24 Oct 2019 03:31:05 -0000 (UTC), Leroy N. Soetoro Sue the PoCo into bankruptcy and this is what you should expect. Read more »

1500 mile e-car for Austin in UK non-toxic fuel cell

October 20, 2019, 5:48 am

https://www.dailymail.co.uk/news/article-7592485/Father-eight-invents-electric-car-battery-drivers-1-500-miles-without-charging-it.html Sounds too good to be true, but maybe. Read more »

Homebrew high voltage coil driver circuit video

October 19, 2019, 8:07 am

https://youtu.be/KcWrrlTRFdM Just a little demonstration... -- Up until 1948 there was a gold medal for town planning in the Olympics. Read more »

Re: Left-wing socialism so good...PG&E slammed for cutting power to mil...

October 14, 2019, 3:36 am

On Mon, 14 Oct 2019 01:42:12 -0000 (UTC), Leroy N. Soetoro Only a Californian could sue the power company into bankruptcy and then ask why the lights are out. Read more »

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The best rated discussions

smps controller IC datasheet?

rating: 5

oem power supply, 31.5 vdc 1.5 A. I want to change the output to 24 v. There is one 8-pin IC, labeled: 230D1 PUICO I don't see a datasheet anywhere for this. Any ideas? Thanks, Dave Read more »

Wiring a contactor for Push Buttons.

rating: 5

I have a GE Contactor CR306Y1 with heaters that I am trying to wire for my motor starter. I understand how to energize the coil but can not find the other tap so I can integrate a start AND stop pus... Read more »

Strain Gauge Oscilloscope Help

rating: 5

I am using Vishay 120 ohm Strain Gauges, (specifically EA-06-062AP-120) to try and generalize certain readings taken from aircraft engines. We have set up a small device to vibrate to simulate an eng... Read more »

Lightning protection and residential landscape lighting

rating: 5

Hi, My house is on a hill which is rocky. After getting hit at least twice in the past two years by lightning, I installed a lighting protection system. On each occasion I was lucky in that the only ... Read more »

Excessive brush wear on DC motor.

rating: 5

Greetings! We have a field excitation DC motor on our SAMP machine. We are experiencing 1 brush on the DC motor to be wearing out a lot faster than the other 3. (My understanding is that the brush t... Read more »

Racking out of motor starter?? How?

rating: 5

I need to take the overcurrents off a motor starter in an MCC. The problem I have is that the motor starter is racked into a live 600 Volt bus. I want to know if I can rack out the motor starter with... Read more »


rating: 5

Hi: Has anyone heard about what ever became of ETCON's AFCI Tester (or more recently: ETCON AF120 ARC-FAULT TRIPPER AND RECEPTACLE TESTER)? Mike Holt's blog. As follows... Underwriters Laboratorie... Read more »

280V motor on 230V circuit

rating: 5
  [ 2 3 4 5 6 7 8 ]

I have a broken pool motor [magnetek y56y] which will cost a bundle to fix or repair. While doing a search on the web, I found the same model (really cheap) but wired for 280V, instead of the 230 V l... Read more »

Solutions to problems in Protective Relaying Principles and Applications by...

rating: 5

I own Protective Relaying Principles and Applications by J. Lewis Blackburn and was wondering if anyone out there had the solutions manual for the book. I am not a student looking to cheat in a clas... Read more »

3-phase corner-grounded delta questions

rating: 5

When wiring up electrical service configured as 3-phase corner-grounded delta, it would seem that the appropriate way to connect overcurrent protection would be to make the 2 ungrounded wired breakab... Read more »

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