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Search: Posts Made By: redwire
Forum: Troubleshooting & Designing Networks Today, 01:08 PM
Replies: 15
Views: 301
Posted By redwire
Re: Netgear = By far the most horrible support ever!

Totally makes sense now: https://dilbert.com/strip/2022-08-08
Forum: General Electronics Technical Discussion Yesterday, 06:20 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

Those water tanks at 1,000L/275gal are large weight up to 1,060kg/2,332lbs.
But they have a small 6" fill cap lid which makes putting sensor and fill pipe inside a hassle.
.. uh make sure the stand...
Forum: General Electronics Technical Discussion 08-06-2022, 12:43 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

With a plastic tank, capacitive liquid level sensors that mount outside on the tank are popular.
XKC-Y26 (https://www.aliexpress.com/item/32797722906.html)/WS-03 can mount on a plastic pipe (with...
Forum: General Electronics Technical Discussion 08-05-2022, 10:48 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

I looked at the logic for the pump and fill valves and it's a bit weird.
It's like each tank has an empty/fill cycle, once empty the pump runs until it fills up.
But if you're filling one tank, and...
Forum: Troubleshooting & Designing Networks 08-05-2022, 02:32 PM
Replies: 15
Views: 301
Posted By redwire
Re: Netgear = By far the most horrible support ever!

It's a magic packet so changing the firmware I think would leave that door there. Doesn't matter really, others looking at my traffic I have nothing to worry about, it's pretty boring. huawei might...
Forum: General Electronics Technical Discussion 08-05-2022, 02:28 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

About what size are the tanks? As I mentioned, as long as the incoming water cannot pour down and hit the float sensors, or if there is not a lot of swirl and turbulence, they can work.
They are...
Forum: General Capacitor Questions & Issues 08-05-2022, 11:54 AM
Replies: 26
Views: 670
Posted By redwire
Re: Blown cap on old dwell gauge - kal equip 2851

The old burnt resistor was GREY-RED for the first two stripes, so it's 82 something something, either 8.2Ω or 82Ω yet you measure 5.0Ω on the burnt part. Hmmm.

I would put in 82Ω and see how it...
Forum: Troubleshooting & Designing Networks 08-05-2022, 10:16 AM
Replies: 15
Views: 301
Posted By redwire
Re: Netgear = By far the most horrible support ever!

What's worse - chinese backdoor in the product, junky capacitors, orphaned firmware, or no warranty?

Netgear does not have a clear list of approved retailers or authorized resellers. They want you...
Forum: General Electronics Technical Discussion 08-05-2022, 09:49 AM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

From OP's pic, it's a submersible pump in the well, with solenoids to divert flow to either of the two tanks. Usually there is a backflow valve to prevent siphoning/water running back down into the...
Forum: Troubleshooting & Designing Networks 08-04-2022, 01:36 PM
Replies: 15
Views: 301
Posted By redwire
Re: Netgear = By far the most horrible support ever!

That authorized NETGEAR reseller (https://www.netgear.com/business/where-to-buy/) list is bullshit, dozens of other vendors sell Netgear like Newegg, Dell, Source etc. and who knows who the...
Forum: Troubleshooting Power Supplies and Power Supply Design 08-03-2022, 06:25 PM
Replies: 35
Views: 7,999
Posted By redwire
Re: Corsair CX400W 5vsb goes into safety loop

It looks like a MLCC terminal thermal crack but it includes the electrodes as well. Seems to be from a bad soldering process?
Gideon MLCC Failure Analysis...
Forum: General Electronics Technical Discussion 08-03-2022, 12:41 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

There's no money with water, it comes out of the well for free. If this was diesel, gasoline, food being pumped you could spend more than $10 on Aliexpress...
Forum: General Capacitor Questions & Issues 08-02-2022, 11:30 PM
Replies: 3
Views: 102
Posted By redwire
Re: this look defective to you?

SamXon? :spank: It does look a little prego but some circuits won't provide enough power for a bad cap to really gas up and go really plump. I'd test it and outright replace that lousy brand anyhow.
Forum: General Electronics Technical Discussion 08-02-2022, 11:26 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

Contactors commonly have a mains-voltage AC coil. This is because they need a lot of power to pull in hard and fast, there is high inrush current until the armature pulls in and the magnetic circuit...
Forum: General Electronics Technical Discussion 07-29-2022, 03:56 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

You can also split the project in two. First get a PLC and panel/HMI built, then later add the webserver/gateway - as long as the PLC is capable of external comms.
I looked at PLC Internet Gateway...
Forum: General Electronics Technical Discussion 07-28-2022, 04:54 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

This is a fire pump panel I've always found interesting. Uses WEG CLIC-02 PLC and a custom back board with a familiar MCU ;)
Forum: General Electronics Technical Discussion 07-28-2022, 04:36 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

I could see the control logic needs some thought, customer going from manual control to automatic.
Typical pump control panel has START/STOP, HAND/OFF/AUTO (and likely needs LOCAL/REMOTE) as well as...
Forum: General Capacitor Questions & Issues 07-27-2022, 10:35 PM
Replies: 11
Views: 361
Posted By redwire
Unhappy Nichicon - discontinuing many electrolytic capacitor series

2022-05 Nichicon is end-of-life mass terminating many really great electrolytic capacitor series: https://www.tti.com/content/dam/ttiinc/products/PCN/Nichicon/NIC-OBSL-PTN-195.pdf
Some seem to be...
Forum: General Electronics Technical Discussion 07-27-2022, 03:56 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

We would start with a site visit- collect drawings, wiring diagrams etc all existing documentation for the site. Take a lot of pictures, to get wiring, part numbers etc of the existing equipment.
...
Forum: General Electronics Technical Discussion 07-26-2022, 11:12 PM
Replies: 9
Views: 178
Posted By redwire
Re: JCD 8898 zener diode ratings

It's a strange soldering station - super cheap at ~$30 and the SMPS power supply looks so small.
MELF diode D5 looks like part of a capacitive dropper arrangement for the top MCU board power. It's...
Forum: General Electronics Technical Discussion 07-26-2022, 07:48 PM
Replies: 63
Views: 1,175
Posted By redwire
Re: Another water pump automation project (suggestions ?)

For these projects, you start with a list of the I/O required, and the voltages/currents for the I/O. This is the "point list" or "tag list" as it can be called, put into an Excel spreadsheet.
This...
Forum: Troubleshooting Audio Equipment 07-25-2022, 11:26 AM
Replies: 8
Views: 243
Posted By redwire
Re: Marshall guitar amp schematic /advice please

Oh, those are for the reverb circuit. I don't see a potentiometer for dry/wet so it's always a fixed amount of reverb.
Forum: General Capacitor Questions & Issues 07-24-2022, 04:45 PM
Replies: 13
Views: 242
Posted By redwire
Re: Any good references for variable capacitor design?

Old crystal sets are always tuning using the (slide) inductor. I've never seen a homemade variable capacitor. They are treated as a component you buy.
The common value of 365pF is a lot of...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-24-2022, 02:31 PM
Replies: 4
Views: 193
Posted By redwire
Re: Uni-t UTP3315TFL-II stuck at 40V laboratory power supply

A stuck relay is not the problem, that does not cause the output voltage to get stuck high.
I see many bad solder joints on the larger through-hole parts. Spend some time and resolder all of them....
Forum: General Electronics Technical Discussion 07-23-2022, 02:45 PM
Replies: 26
Views: 533
Posted By redwire
Re: PWM LED Driver DIY - looking for comments and criticism

I have no troubles with Arduino Uno ADC, getting 10 bits resolution out of them. But some Arduino boards have no VREF filter or it's run with noisy power or missing 0.1uF input cap, switching the mux...
Showing results 1 to 25 of 500

 
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