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The most recent discussions

Li-Polymer Batteries

  [ 2 ]
October 16, 2017, 2:16 pm

I'm looking at buying these batteries for a test project and they ask the buyer to choose between battery types 357090 & 357095. I can't find any references anywhere that describe what these mod... Read more »

Contactors/Relays

  [ 2 ]
October 14, 2017, 6:16 pm

I have futilely been seeking 100A 3ph NC/Form B relays/contactors. It seems they are all stashed in the unicorn eggs box, sigh. So a second design approach involves dual coil relays. The flavor I ... Read more »

recuperated transistors : igbt or mosfet ?


October 8, 2017, 2:31 pm

Hi, I recuperated a lot of semiconductors but I now face the identification of these item, principally mosfet and igbt. How can I identify the one from the other with e.g. a dmm ? Kind regards, ... Read more »

Pre-1979 Nat Semi 4-pin sensor


September 30, 2017, 1:04 am

I have a 4-pin sensor with a Natioinal Semiconductor logo and /831 on the body. The body has the loose appearance of an 8-pin IC that's been cut in half, through the package center line (leaving ... Read more »

Microdisplay Market: Key Trends, Demand, Growth, Size, Review, Share, Analy...


September 26, 2017, 11:21 am

Microdisplay market is expected to grow US$ 8942.3 million by 2025 from US$ 845.3 million in 2016. The sales of Microdisplays is largely influenced by numerous economic and non-economic factors. ... Read more »

IC header cables


September 22, 2017, 3:17 pm

I've seen what I need: a 16 pin DIP header that plugs into an ordinary IC socket, but one with a ribbon cable coming off it. But now that I need to buy one, I can't find the right terms to define ... Read more »

Needed: 100A contactors


September 14, 2017, 3:04 am

I'm seeking some 80-100A contactors. 3P, Form B (or C), 24VAC coils, DIN rail mounting. Any suggested PN's & sources? -- A host is a host from coast to coast.................wb8foz@nrk.com & n... Read more »

SMD ident, bipolar chars, package types etc


September 9, 2017, 11:50 pm

I notice that smd identification tools are disappearing from the web for one reason or another. are difficult At the same time, basic transistor functional types remain difficult to search or co... Read more »

SOT23-5 marked V5AE


September 9, 2017, 8:58 pm

SOT23-5 marked V5AE Any ideas? RL Read more »

How do they paint the stripes on resistors, bumble bee caps, etc?


September 9, 2017, 2:11 am

I've always wondered how they paint on the colored stripes. I put how do they paint the stripes on resistors on google, but all I got was links explaining how to READ color codes. Has anyone ever ... Read more »

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The best rated discussions

rating
5

resistor color code help


Howdy all I have a resistor on a front panel tv control that has a 5 band color code of brn-blu-red-gold-grn. This resistor is not burnt but measures 1.62K ohms. from the color code I would suspect... Read more »

rating
5

How solder to very fine enamelled woven wires in earphone lead?

  [ 2 3 ]

I have some Sony in-ear headphones. The lead to one earpiece has been cut through completely and I want to rejoin the two wires (which I will call 'conductors' to avoid confusion). The two 'conduc... Read more »

rating
5

capacitor ESL measurement


Hello, Is there anyone know how to measure the ESL of film capacitor? Will there be any reference standard? Thanks, GS Read more »

rating
5

Bell tone generator IC ?


Can any reader suggest a bell or chime tone generator IC that's presently available retail? In the past I've used parts like the SAB0600 - 8 pin DIP, hooks up directly to an 8 ohm loudspeaker, only r... Read more »

rating
5

9v battery terminal blanks?

  [ 2 3 ]

I want to keep some NiMH rechargeable 9v batteries in my tool bag (well, my meter bag, actually). I am currently running a double loop of electrical tape around the entire battery to insulate the... Read more »

rating
2.5

Stepper Motors and Hobby Motors


I have collected a huge amount of stepper motors and hobby motors from CD Roms, DVD players, toys, Audio equipment and just about any item that uses a motor. All motors are tested. If you are interes... Read more »