does polarity matter on resistors or SMDs?
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Re: does polarity matter on SMDs or resistors?
resistors dont have polarity. ceramic capacitors dont have polarity -
Re: does polarity matter on SMDs or resistors?
"SMDs" means Surface Mount Devices. Resistors, single-winding inductors, ceramic caps and film caps have no polarity - through-hole or surface mount. Electrolytic caps, polymer caps, tantalum caps, diodes (all types), transistors, FETs and ICs have polarity - through-hole or surface mount.PeteS in CA
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
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Re: does polarity matter on SMDs or resistors?
SMDs WMDs its all so confusing
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Re: does polarity matter on SMDs or resistors?
I thought only crap-caps were WMDs (Weapons of Motherboard Destruction).PeteS in CA
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
****************************
To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
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Re: does polarity matter on SMDs or resistors?
thanks guys
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Re: does polarity matter on SMDs or resistors?
nope as above
the only reason you may want to put a resistor in in a particular direction is so you can read them all the same way, this really helps with colour coded non smd type ones
(like some 5 bands are hard enough to read when you got the right direction)
smd, smc are usually numerically coded but still a good idea to run them in the same direction so they read the same direction.
I like thatI thought only crap-caps were WMDs (Weapons of Motherboard Destruction).
You step into the Road, and if you don't keep your feet, there is no knowing where you may be swept off to." Bilbo Baggins ...Comment
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I want to buy one of those SMD component books so I don't have to spend as much time searching my scrap boards for what I need, specifically ceramic caps and resistors as they seem to be what I spend most of my time replacing. But the only ones I can find are no name brands. Does manufacturer matter as much for SMD parts as it does with electrolytics or is the generic stuff likely to be fine?
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Hey everyone,
I'm currently working on a mid-70s Sharp Electronic Digital Clock Radio, Model FY-70CH. I found the service manual online, printed it out, and have been studying it for a while. My main reasons for tackling this are: (1) I want to learn electronics and figured I'd start with something I had on hand, and (2) I want to fix its issues. Right now, the radio sounds awful, has about 5V DC at the speaker terminals, and the alarm time setting doesn't work. But I'm not asking how to fix these problems.
Instead, here's what's been bugging me so far:
The schematic... -
I think it would be dumb to toss a "modern" motherboard just because a resistor got scraped off, so here I am. I am hoping to find the right schematic so I can see if the motherboard can live without 1 of 3 60B SMDs in series likely scratched off by the backplate of a PCI-E card install or removal. It could be related to a functionality that is not needed or critical, or it could fry anything I plug into it and power on. If I could find a replacement, I could likely pop in on the board, but if I don't need to, then screw it, I don't mind leaving something dark that doesn't matter....07-06-2025, 02:00 PM -
Hi everyone, I recently acquired an HP EliteBook 840 G4 (6050A2854301-MB-A01) that I'm hoping to bring back to life. I'm fairly new to laptop repairs but eager to learn and willing to put in the effort to understand and fix this. Any advice or guidance would mean a lot!
What Happened
The issue started when the laptop was accidentally plugged in with reverse polarity. Before this incident, the laptop would show a power/charging light whenever it was plugged in. However, now it's completely unresponsive—no lights, no power, nothing. I've been doing some research and understand... -
Hi All - I'm in the midst or reprogramming the bios on my gen1 Surface Laptop Studio and I accidentally blew away 2 resistors nearby the bios. I don't have another board to measure values of the missing resistors and schematics aren't available, bbut the bios is a 6x5mm Winbond WSON8, W25R256JWPQ model. The traces are conductive to Pins 3 and 7 (IO2 & IO3 respectively) so I have reason to believe they are 10k pull up resistors since IO2&3 pins are used for Quad SPI instructions.
Does anyone with more knowledge, and experience than I, know if this is the case?
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