Splattering solder into eye?

Started by Peter Hucker in sci.electronics.basics1 month ago 55 replies

Has anyone ever actually been unlucky enough to get solder splattering into their eye? I've had it hit my leg, hand, and face, but never in my...

Has anyone ever actually been unlucky enough to get solder splattering into their eye? I've had it hit my leg, hand, and face, but never in my eye. How bad is it? -- http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com Confuscious say: "War doesn't determine who's right. War determines who's left."


Testing small Transformer questions

Started by StevWolf in sci.electronics.basics1 month ago 8 replies

I have a dead Ac/Dc adaptor. I'm busted it just to learns stuff. Im trying to learn how to test Transformers. This transformer says on it...

I have a dead Ac/Dc adaptor. I'm busted it just to learns stuff. Im trying to learn how to test Transformers. This transformer says on it AM= S10405 RG 1320F. I provide this to give all information, however Im not sur= e it matters much to my question. I have so far removed from what I can gather are the Primary wires from the= board. I assume they are because they are white and black and ...


Altering PCBs

Started by Bret Cahill in sci.electronics.basics1 month ago

No way to pull over a heavy commercial vehicle after knocking off its tail light even if you wanted to so even though it must represent a small...

No way to pull over a heavy commercial vehicle after knocking off its tail light even if you wanted to so even though it must represent a small fraction of unreported minor accidents, freeways are littered with perfectly functional tail lights. The question is, what is the easiest way to convert the 3s X 8p 12v wiring of the LEDs to 8s X 3p? And do I really need a resistor in each series? ...


Email configuration for security camera

Started by AK in sci.electronics.basics2 months ago 3 replies

I was not sure which group to post this too, so this is the closest I could find. I have a security camera sold by Harbor Freight. It is a...

I was not sure which group to post this too, so this is the closest I could find. I have a security camera sold by Harbor Freight. It is a Cobra CCTV. This is what I am trying to set up for sending me video of my camera/ https://imgur.com/a/P1R0E9P I am trying to get it set up so it will send video to my email address. I contacted Harbor Freight and there were of no help. Is t...


Capacitor rules

Started by Daniel in sci.electronics.basics3 months ago 5 replies

Hi folks I'm really new with electronics. Doing a massive project for a retro computer system and, as a prong of this project I'm attempting...

Hi folks I'm really new with electronics. Doing a massive project for a retro computer system and, as a prong of this project I'm attempting to locate a modern equivalent of the board components. Enter the tantalum capacitor. Having gone to digikey, mouser, and newark none of them seem to have the item I'm looking for in stock. What are the rules about alternate values? The tantalum cap I'm...


Detecting eavedropping devices in PC parts?

Started by Mr. Man-wai Chang in sci.electronics.basics3 months ago 3 replies

Is there an easy way to check wehther a certain PC component has eavedropping device ATTACHED? :)

Is there an easy way to check wehther a certain PC component has eavedropping device ATTACHED? :)


Phone no longer charges

Started by AK in sci.electronics.basics3 months ago 2 replies

I have a Samsung S5 cell phone. It just now stopped charging. ?? I have tried at least 3 different charging cables, and 3 different...

I have a Samsung S5 cell phone. It just now stopped charging. ?? I have tried at least 3 different charging cables, and 3 different chargers. I also removed the battery and did a factory reset. Anyone have any other ideas? Thanks.


Trying to understand math for Battery resistance ?

Started by StevWolf in sci.electronics.basics4 months ago 2 replies

I=E2=80=99m working though understanding this description in this book. see= attachment link below. I have tried this method for testing...

I=E2=80=99m working though understanding this description in this book. see= attachment link below. I have tried this method for testing household batteries. I know there are = other ways of testing batteries, but really I'm just trying to work my way = through this book as a personal exercise. Please refer to link below for the book example Im trying to follow. The ha= nd written notes are...


Ideas for a 12V brake light flasher circuit

Started by Joe in sci.electronics.basics5 months ago 4 replies

Hi, I'd like to try and build a brake light flasher circuit for a motorcycle (12V). Brake light should flash 3-5 times then remain on (solid...

Hi, I'd like to try and build a brake light flasher circuit for a motorcycle (12V). Brake light should flash 3-5 times then remain on (solid red). I'm new to electronics so not everything is clear to me. Is it possible to build such a circuit and remain in 12V "domain" or is it necessary to step down to 5V to power an IC (a counter with a clock, for example) ? I'd like to use a 12V LED bulb (e...


How to know when to change battery in multimeter

Started by AK in sci.electronics.basics6 months ago 2 replies

On my multimeter, the voltage readings get inaccurate over time due to battery discharge. My meters all use 9 volt batteries. How can I tell...

On my multimeter, the voltage readings get inaccurate over time due to battery discharge. My meters all use 9 volt batteries. How can I tell when to change out the batteries? Thanks.


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