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Search: Posts Made By: Mad_Professor
Forum: General Electronics Technical Discussion 05-13-2019, 04:19 PM
Replies: 6
Views: 599
Posted By Mad_Professor
Re: How to read znr or mov?

Sorry for the absence, got a lot going on with work.



Measures 11.35mm across, how were you able to extrapolate that from the values on the blown one?



It's possible, We got another...
Forum: General Electronics Technical Discussion 05-10-2019, 08:32 PM
Replies: 6
Views: 599
Posted By Mad_Professor
Re: How to read znr or mov?

Well ZD is zener on the board, ZNR1 is the MOV? I think, that's what is blown.
TR1 is the transistor d2139.

2000 sentra, all stock, no mods.

Long story short, he did errands all day, last...
Forum: General Electronics Technical Discussion 05-10-2019, 07:23 PM
Replies: 6
Views: 599
Posted By Mad_Professor
How to read znr or mov?

I got a nissan instrument cluster with obvious blown znr
I'm not familiar with them since I never replace them. This is a first for me.

How does one read details on the znr/mov for replacement?
Forum: General Computer & Tech Discussion 08-07-2018, 04:22 PM
Replies: 16
Views: 1,016
Posted By Mad_Professor
Re: Building a Router Server?

Link aggregation is not really all that great. Good for failover and load balancing but for bundled speed, it sucks, since you can't split packet streams because of how protocols are written, so...
Forum: Troubleshooting & Designing Networks 07-11-2018, 10:16 AM
Replies: 5
Views: 1,044
Posted By Mad_Professor
Re: Wiring CAT5e to a CAT6 patch panel.

What are you trying to to do?
It sounds like you want wire up rj11 (4p4c) from modem to connect multiple phones in different rooms from the wiring closet using cate 5e.

Frankly cat5e will work...
Forum: General Computer & Tech Discussion 11-01-2017, 03:04 AM
Replies: 3
Views: 860
Posted By Mad_Professor
Re: Raspberry Pi HDMI problems re. power supplies

Have you tried adding
hdmi_force_hotplug=1
or

hdmi_drive=2
to the config.txt?
Forum: General Capacitor Questions & Issues 10-08-2017, 03:19 PM
Replies: 4
Views: 875
Posted By Mad_Professor
Re: Can I use these? GC/RS for RLP

Thanks guys, I used the RS, I also ran into same thing with another PSU 2200uf 6.3 and after jazzie comment, I used a nichicon HE for that.
Forum: General Capacitor Questions & Issues 10-07-2017, 01:55 PM
Replies: 4
Views: 875
Posted By Mad_Professor
Can I use these? GC/RS for RLP

quick question
recapping dell psu, missed capacitor spec, it's 3300 6.3 OSI RLP, there seems to be a pi coil in the circuit I would assume it's for 3.3v rail

RLP
0.38 ohms @ kHz, ripple 1655
...
Forum: General Computer & Tech Discussion 06-23-2017, 05:02 AM
Replies: 27
Views: 2,890
Posted By Mad_Professor
Re: Firefox will not display ebay properly.

LMAO!
It's been doing this in linux as well. Ubuntu, arch, fedora and so on, same problem, all firefox.

Recently I've switched to chromium. I noticed firefox getting slower and slower for the...
Forum: General Electronics Technical Discussion 10-25-2016, 04:16 PM
Replies: 31
Views: 3,366
Posted By Mad_Professor
Re: New electric panel.

I've got the QO 12 circuit 6 slot panel for my shop, I had the same thought, it's definitely copper with tin finish.
Forum: General Capacitor Questions & Issues 10-23-2016, 07:29 PM
Replies: 8
Views: 2,097
Posted By Mad_Professor
Re: Drilling with a pin

Drilling? no. Using a pin to clear the holes yes, I usually do it when the solder can still be liquefy with the iron but can't be removed with copper braid or a bulb based vacuum de-soldering iron. ...
Forum: General Electronics Technical Discussion 09-19-2016, 07:01 PM
Replies: 8
Views: 2,052
Posted By Mad_Professor
Re: 94 accord ECU, battery light on

I had junkyard one in there and now a reman one from advance auto on second replacement. All three bit the dust less than an hour of operating. Second time I swapped the battery from my car into the...
Forum: General Electronics Technical Discussion 09-19-2016, 02:57 PM
Replies: 8
Views: 2,052
Posted By Mad_Professor
Re: 94 accord ECU, battery light on

Well new alternator in, after an hour or running idle, grayish smoke coming from alternator along with what smells like electronics burning, then the battery light came on.

I think the ECU fried...
Forum: General Electronics Technical Discussion 09-18-2016, 05:21 PM
Replies: 8
Views: 2,052
Posted By Mad_Professor
Re: 94 accord ECU, battery light on

End up being bad alternator, rip the one out of my car and tested in 94.

Can't buy decent shit these days.
Forum: General Electronics Technical Discussion 09-17-2016, 05:47 PM
Replies: 8
Views: 2,052
Posted By Mad_Professor
94 accord ECU, battery light on

I'm working on 94 accord, and about two days ago I was called and the person was complaining that the D4 light was flashing and transmission was having issues shifting, hard starting or not starting,...
Forum: General Computer & Tech Discussion 07-22-2016, 01:52 AM
Replies: 21
Views: 3,431
Posted By Mad_Professor
Re: Recommend good gaming vid card

Don't waste money on SLI or crossfire setup, I've done it, you have to wait for driver support, and hope that the games developed actually utilize SLI or crossfire, I only saw a marginal improvement,...
Forum: General Computer & Tech Discussion 07-21-2016, 11:02 AM
Replies: 21
Views: 3,431
Posted By Mad_Professor
Re: Recommend good gaming vid card

For 100-150 is not a lot to work with. You'll have to shop around for GTX 950 or R7 360 (or 370) You'll be able to get one on sale or with a rebate in your price range.

The card above is mid range...
Forum: General Electronics Technical Discussion 07-04-2016, 05:55 AM
Replies: 56
Views: 4,322
Posted By Mad_Professor
Re: Boost output voltage on a 7805 regulator

We didn't plan on using the existing wiring, we would just supply a new run.

As far as I can see everything is working without the ammeter.

No fireworks, awww you're no fun. What's 4th of july...
Forum: General Electronics Technical Discussion 07-03-2016, 05:51 PM
Replies: 56
Views: 4,322
Posted By Mad_Professor
Re: Boost output voltage on a 7805 regulator

So we took the wrap on the wiring harness off on the engine side of firewall, and found the welded splices and I think a diode of some sort. Not sure what it's for yet, but we hooked up the ammeter...
Forum: General Electronics Technical Discussion 07-01-2016, 03:16 AM
Replies: 56
Views: 4,322
Posted By Mad_Professor
Re: Boost output voltage on a 7805 regulator

Yes, the needle is not stuck and moves freely.

Here's a wiring diagram from cluster to engine harness

Circuit A1-20RD and B1-20BK are for the ammeter.
Forum: General Electronics Technical Discussion 06-30-2016, 03:17 PM
Replies: 56
Views: 4,322
Posted By Mad_Professor
Forum: General Electronics Technical Discussion 06-30-2016, 03:07 PM
Replies: 56
Views: 4,322
Posted By Mad_Professor
Re: Boost output voltage on a 7805 regulator

Well, hold on, those alligator jumpers are kind of known to have some resistance, let me take a second read.



It's basic, most people don't know what it's for anyways.

BRB
Forum: General Electronics Technical Discussion 06-30-2016, 02:52 PM
Replies: 56
Views: 4,322
Posted By Mad_Professor
Forum: General Electronics Technical Discussion 06-30-2016, 02:01 PM
Replies: 56
Views: 4,322
Posted By Mad_Professor
Re: Boost output voltage on a 7805 regulator

It's reading 0.0 ohms.
Shorted?
Forum: General Electronics Technical Discussion 06-29-2016, 02:39 AM
Replies: 56
Views: 4,322
Posted By Mad_Professor
Re: Boost output voltage on a 7805 regulator

Thanks for the heads up, but nothing happened. I have several fused inputs on my meter.

Anyways I'm not sure what's wrong, I've found the wiring diagram and I get 12v from one lead and 12v from...
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