5 Pin Round Screw In Connector to USB

Started by Bret Cahill in sci.electronics.basics8 months ago 13 replies

The 5 pin end is male male. The externally threaded dia is 7 mm. The pins are radially symmetrical oriented with a couple of flat chord areas...

The 5 pin end is male male. The externally threaded dia is 7 mm. The pins are radially symmetrical oriented with a couple of flat chord areas above 2 adjacent pins. This probably isn't a aviation connector. What is the name of this connector? Bret Cahill


Fresnel lens?

Started by AK in sci.electronics.basics8 months ago 7 replies

I am trying to maximize the amount of light that a red laser produces when it hits a cadmium photo cell. I went from a photocell with a small...

I am trying to maximize the amount of light that a red laser produces when it hits a cadmium photo cell. I went from a photocell with a small area to one with about double the area. I salvaged this from a laser printer and was wondering if that clear thing is a fresnel lens? [IMG]http://i64.tinypic.com/29w0bwi.jpg[/IMG] Am also trying to figure what that clear led is.? There is a ...


Basic electronics

Started by Andy in sci.electronics.basics8 months ago 5 replies

I started reading Understanding Basic Electronics by Larry Wolfgang. He explains well and keeps it interesting. Good chapter on algebra to help...

I started reading Understanding Basic Electronics by Larry Wolfgang. He explains well and keeps it interesting. Good chapter on algebra to help with things like Ohms law. The American Radio Relay League looks profitable too. Andy


Dark powdery particles from soldering iron

Started by AK in sci.electronics.basics8 months ago 11 replies

When I changed my tip on my Chinese copy of a Hakko wannabe, I saw a small amount of black powdery residue that came out. I have used the...

When I changed my tip on my Chinese copy of a Hakko wannabe, I saw a small amount of black powdery residue that came out. I have used the soldering around 50 times. Is that part of a carbon rod? Thanks, Andy


[Movie] The Current War

Started by Mr. Man-wai Chang in sci.electronics.basics9 months ago

The Current War Trailer (2019) l In Cinemas 26th July 2019 Source:...

The Current War Trailer (2019) l In Cinemas 26th July 2019 Source: https://www.amccinemas.com.hk/en/movie/details/16/11507 Synopsis Starring Benedict Cumberbatch as Thomas Edison and Michael Shannon as George Westinghouse, THE CURRENT WAR is the epic story of the cutthroat competition between the greatest inventors of the industrial age


Speaker id needed

Started by AK in sci.electronics.basics9 months ago 15 replies

This is from a cordless phone. I think it is a speaker. Phone uses 2.4 volt battery. I was wondering if it would work in a 9 Vdc...

This is from a cordless phone. I think it is a speaker. Phone uses 2.4 volt battery. I was wondering if it would work in a 9 Vdc circuit? https://www.dropbox.com/s/yy6rwm0vib91010/PhoneSpeaker.jpg?dl=0


Pinging AK Andy

Started by default in sci.electronics.basics9 months ago 10 replies

https://www.allelectronics.com/item/osu-1130/through-beam-photo-electric-sensor-pair/1.html check it out $11.35 pair Product...

https://www.allelectronics.com/item/osu-1130/through-beam-photo-electric-sensor-pair/1.html check it out $11.35 pair Product Description SICK Optics WS15-D1130 / WE15-A1130. Photo-electric sender and receiver pair detects the presence of an object when the beam between the two is interrupted. Useful in automation, alarm systems and door annunciators. When the beam is broken, the rece...


From breadboard to soldering

Started by AK in sci.electronics.basics9 months ago 45 replies

I am ready to transfer my circuit from breadboard to PCB Prototype Circuit Solder BREADBOARD. Any advice appreciated. Is 22 gauge hookup...

I am ready to transfer my circuit from breadboard to PCB Prototype Circuit Solder BREADBOARD. Any advice appreciated. Is 22 gauge hookup wire what I need? I was going to order these. https://www.ebay.com/itm/2x-5-x-10-cm-DIY-PCB-Prototype-Circuit-Solder-BREADBOARD-Discrete-and-D IP/141677397222?hash=item20fca184e6:g:lUAAAOSwPcVVvnaf SPDT switches 4 conductor wire to run my photoce


Audio capacitor

Started by AK in sci.electronics.basics9 months ago 6 replies

I salvaged some boards from a Yamaho radio. HTR - 5460 260 watts One boards has some 63V 12,000 uF caps. No voltage shows on both AC and DC...

I salvaged some boards from a Yamaho radio. HTR - 5460 260 watts One boards has some 63V 12,000 uF caps. No voltage shows on both AC and DC scale. Is it safe to desolder? I also got a whopper transformer that weighs 9 lbs.


Test hook clip

Started by AK in sci.electronics.basics9 months ago 5 replies

I would like to be able to test circuits in tight spaces and it looks like this addition would work. It's too bad they don't list the...

I would like to be able to test circuits in tight spaces and it looks like this addition would work. It's too bad they don't list the internal dimensions of the part which attaches to your meter leads. https://www.ebay.com/itm/10pcs-42mm-Long-Test-Hook-Clip-Solderable-for-Multimeters-PCB-Tester-Gr abber/233173487828?epid=26020204308&hash=item364a3910d4:g:5fkAAOSw5ydclZIc Andy


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