John Wiltrout's Blog - All Comments

RE: Reverse Engineering an Alarm Siren Module

kaan3553 — Sun, 25 May 2025 17:36:02 GMT

Merhaba arkadaşlar.. Başarılı çalışmanız için tebrikler.. Ben de bunu yapmak istiyorum ama d2 diyot elementinin değeri veya adı nedir? Şemalarda belirtilmemiş.. Bana yardımcı olabilirseniz çok mutlu olurum.. Teşekkür ederim.

RE: Vacuum Chamber for Pulling Wires through a Sheath

Alihaiderfarooq123 — Fri, 22 Dec 2023 21:04:52 GMT

Do you have any video for its working?

RE: Grafting 2 Damaged Circuit Boards

GuerraTron — Wed, 01 Nov 2023 23:48:56 GMT

Amazing, great work.
This is a work of electronic craftsmanship.
Few technicians entertain this type of reconstruction.
Congratulations. You're an artisan

RE: Vacuum Chamber for Pulling Wires through a Sheath

dougw — Wed, 07 Dec 2022 18:59:28 GMT

Do you need to seal the tube to the endcap to prevent air leaking in or is the flared tube acting like a ferrule?

RE: Vacuum Chamber for Pulling Wires through a Sheath

fmilburn — Tue, 06 Dec 2022 17:52:26 GMT

Very ingenious. I’m always impressed with the breadth of your skills and knowledge.

RE: Vacuum Chamber for Pulling Wires through a Sheath

dougw — Mon, 05 Dec 2022 18:53:05 GMT

It sounds like you could sell your apparatus as a product to repair shops around the country.

RE: Vacuum Chamber for Pulling Wires through a Sheath

genebren — Mon, 05 Dec 2022 18:10:31 GMT

Very cool process and very clever thinking!

RE: Vacuum Chamber for Pulling Wires through a Sheath

ralphjy — Mon, 05 Dec 2022 16:41:18 GMT

Very creative solution to the problem. I'm always impressed by the quality of your execution in repairing things.

Wish I could still do as well, but poor vision, arthritic hands, and mostly a lack of patience get in my way. I recently damaged some pads on a PCB because I got frustrated trying to remove a connector.

Well done!

Ralph

RE: Vacuum Chamber for Pulling Wires through a Sheath

Fred27 — Mon, 05 Dec 2022 12:32:56 GMT

It's great that you discovered a new technique. I was expecting to see that sealing against the vacuum was as problematic as sealing for inflation. I'm glad that wasn't the case.

Those cables really should be a cheap replacement item, but I'm guessing that your "hobby business" is based on the fact that they're sold at vastly inflated prices.

RE: Vacuum Chamber for Pulling Wires through a Sheath

Andrew J — Mon, 05 Dec 2022 10:16:19 GMT

Great thinking. Threading lots of wires through a sheath is the Devil’s own job and I’ve never had to do it when replacing just one or two!

RE: Vacuum Chamber for Pulling Wires through a Sheath

michaelkellett — Mon, 05 Dec 2022 10:04:33 GMT

Very neat. I wonder how they do it for new cables.

The only similar arrangement I'm familiar with uses 20mm flexible conduit and is less than half full, easy enough to thread but no use at all for a hand held workpiece.

I was once a spectator when some co-workers were trying to thread a set of 20m long 150A 3 phase cables into plastic tubes to makea neater arrangement for a test rig. it involved a lot of cable lubricant and a lot of sweat. I was very happy to be working on the low power end of the electronics.

RE: Vacuum Chamber for Pulling Wires through a Sheath

dougw — Mon, 05 Dec 2022 04:10:29 GMT

Very clever idea. Well done.

RE: Cheap Chinese Volt Amp Panel Meter won't zero

mrh586 — Fri, 14 Oct 2022 11:59:26 GMT

My voltmeter turns on but only shows zero
I reset but it didn't work

RE: Exploring a Voltage Controlled Pulse Width Modulator Chip ( LTC6992)

Piyushkamdi — Thu, 14 Jul 2022 07:02:07 GMT

Sir please mention the simple formula to calculate frequency in LTC6992

RE: Bench Testing the Recom R-78E5.0 Switching Converter against the LM7805

Shepa — Fri, 11 Feb 2022 08:36:32 GMT

Great analysis!
But, in the worst case, if R-78C burns out, what would be on the output? How many Volts? Zero or Vin???
Thank you!