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The most recent discussions

Bipolar Semiconductor and SMD Ident database update190807

August 7, 2019, 8:26 pm

The smd marking code data base is updated, to include two- terminal devices, power supervisory circuits, GaAs mmic devices, transient suppression devices. Many typos and redundancies are addressed... Read more »

do you have a dvd optical drive motor number: PPN13KA12C

July 15, 2019, 4:33 pm

Looking for a commonly used DVD / CD motor by Minibea part number: PPN13KA12C or PPN-13KA12C Read more »

Long shot: operating high power laser modules in vacuum

March 28, 2019, 11:06 pm

Dudes of all flavours; I have an itch: I wish to run a 10W laser module in a vacuum chamber (UHV: 10^-6mbar or so). Anyone got any direct experience of the 'fun' in keeping the diode cool? And any... Read more »

Dioed. Circuit board for a kerosene heater Is there a replacement for it?

February 19, 2019, 6:36 am

Wanting to know what this is. Wanting advice on if there?s an easy replacement. Read more »

Looking for 2mm pitch 2-row female connectors

February 12, 2019, 9:56 am

Hi folks, I've got an industrial PC module (MSI MS-96F6). I'm looking for matching connectors. 2.54mm molex is common, 2.0mm is not! https://app.box.com/s/rlves2mmv8byz8ptmsi4t5gmvwdpjxxk ht... Read more »

Bipolar Semiconductor and SMD Ident database update190131

January 31, 2019, 10:12 pm

The smd marking code data base is updated, to include two- terminal devices, power supervisory circuits, GaAs mmic devices, transient suppression devices. Many typos and redundancies are addressed... Read more »

Looking for links and order info for PARTS

  [ 2 ]
December 18, 2018, 11:20 pm

I recenty posted this to a newsgroup specific to tube gear, but got no responses. I am sure most of you on here are into modern solid state gear, but maybe some of you also work on the old stuff to... Read more »


November 30, 2018, 7:11 am

Got a sad email today: It is with sincere regret that we are announcing the final days for HSC in Silicon Valley. After 54 years we will be closing our doors for the final time on Saturday, January... Read more »

IC test clip with LEDs

October 17, 2018, 8:16 pm

I remember years ago seeing a clip that would fit over an IC and show the logic state of each pin on an LED (or an LED pair). Something like this https://uk.farnell.com/3m/923690-08/test-clip-dil-... Read more »

Power a test TTL circuit from USB?

October 16, 2018, 1:04 pm

Having not touched any of this kind of stuff for years I'm looking to power a small TTL test circuit which I intend to built on a breadboard. I wondered if I could run it off USB power. In other ... Read more »

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The best rated discussions


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 »


Timing relay providers

I seek a timing relay with some/all of the following: a) LV operation, 12-24VDC or AC b) Input triggers a one-shot output c) Intervals in hours, 1-14 or so. d) Reset that will terminate the one-s... Read more »


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 »


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 »


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 »


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 »


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 »