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Basic Electronics

These groups are the best place to ask your basic electronics beginner questions or help other people just starting out with electronics

Hobby Electronics Basics

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OT: Command prompt locks up machine running XP Pro SP2

by Bill Bowden
I can't get the command prompt to work on this XP Pro SP2 machine. It opens up and does the usual DOS commands CD DIR etc. but won't run Turbo Basic without locking up when I try to exit. Screen go... read more »

Electronic Components

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AT89S52-24PC.

by Ian Field
Liberated this part from a scrap Hitachi CD/radio, the S in the middle of the number had me not expecting it to be a flash programmable part - but the data sheet seems to suggest it is. Not only ... read more »

Electronics Down Under

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Gain switching, avoiding audible transients

by Bruce Varley
I need to switch the gain of an audio preamp using a reed relay, Kv = 3 (low), and 10 (high). It's important to avoid audible pops during the switching. The device involved is a lo-noise audio opa... read more »

Electronics Equipment

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WTB: AB-21/GR, AB-22, AB-23, and AB-24/GR Antenna Sections

by NE8S
Looking for anyone who may have some Military Surplus Antenna Sections or Elements for the Field Ground Plane Antenna Kit AT-292/PRC or the RC-292/MP-68. There are four different antenna section... read more »

General Electronics

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Current mirror

by Patrick Chung
Current mirror is inevitable part of input stage of operational amplifiers. Current mirror behaves almost as perfect current source in small current signals application and it has excellent character... read more »

Advanced Electronics

These forums contain more advanced topics which are most suitable for people with some experience in electronics. Start a dicussion here if your topic is not basic and does not fit into another, more specific category

Electronics Computer-Aided Design

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LTSPICE BF981

by Pratik Shirore
Hello Everyone I am doing research on FINFET and I am looking for library's in LTspice,Any library relented to any FINFET please help. Thanks In advance Pratik S read more »

Electronics Design

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LED Backlight driver output current / voltage

by bhav.jnk
Our LCD has 10 series white LEDs for backlight with total Vf of 15V and cur rent of 40ma. The backlight circuit is designed with SC4509. As per the dat asheet its recommended output voltage is 20V ... read more »

Electronics Repair

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Unusual RS232C connector on Tatung tablet, TWN-5213 CU.

by Peter Easthope
A photo of the unusual RS232C connector on Tatung tablet, TWN-5213 CU, is h ere. http://carnot.yi.org/TatungTWN5213RS232.png The smallest increment on the steel rule is 1 mm. The connector is ess... read more »

Field-Programmable Gate Arrays

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Low-end FPGA mezzanine standard

by Theo Markettos
Anyone know if there's a standard(ish) for simple mezzanine cards for FPGA boards? I know about things like FMC and HSMC which are very 'high end' - multi gigabit transceivers, expensive connector... read more »

Microcontrollers

These forums contain discussions about microcontrollers, their application and programming with topics ranging from LED blinking to embedded operating systems.

Embedded Programming

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Open source (pref) assymetric crypto C library for ARM Corte...

by mikedavies621
Hi, Question as title : I have an existing product that has an ARM Cortex M3 C PU and which I need to retrofit with assymetric crypto to send small amount s of encrypted data. The CPU I am lande... read more »

Embedded Linux

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Need JAVA Web Developer in Chicago IL

by Rohan Tekwissen
Hi, Hope you are doing great, Kindly go through the requirement and let me know if you have any consultant for that. Senior Java web developer Location: Chicago IL (Need locals) Duration: 6-12 M... read more »

Microcontroller Discussions

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Microchip Forums upgrade borked

by Ian Malcolm
Well its been about 24 hours now and the upgraded forum is still unusable http://www.microchip.com/forums/ Without a usable forum, Microchip are just another manufacturere with a crappy website .... read more »

Raspberry Pi Group

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is it possible to send 5v output from raspberry pi?

by Marcus Vinicius Brasizza
Hello, I'm new in this group and with raspberry pi as well. I got this new challange using my software connecting with another machine with the raspberry as a communication gateway. the machine wi... read more »

International Electronics (BETA)

We provide access to electronics newsgroups in languages other than English. Due to heavy use of technical and scientific terms, these discussions are relatively easy to translate to the language of your choice. Please only post using the particular language of the forum. Please note: support of groups in languages other than English is still in BETA. Some features, such as post and reply for example, are not currently working in the international forums

Electronics (German)

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RS232 / Digitale Eingänge für IPAD

by
einzuhauchen um dort softwaretechnisch diverse Signale anzuzeigen? Die Schnittstelle soll entweder diskrete Signal (0V/12V) einlesen entgegennehmen. Die Anbindung an den IPAD kann gegebenfalls auch... read more »

Electronics (Spanish)

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Reparando el monitor

by
El monitor de mi PC de sobremesa llevaba unas semanas haciendo el lo abres, se queda colgando de los cables... https://www.dropbox.com/s/3avg4432sn2vl9m/IMAG1931.jpg?dl=0 hasta ha ganado brillo! ... read more »

Electronics (Dutch)

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Koptelefoon draadloos en goed bereik en noise cancelling

by
Ik zoek een koptelefoon die: - noise cancelling heeft, en, - draadloos is, maar wel door muren gaat (volgens mij moet je dan geen bluetooth hebben maar radiofreq.(rf)) Ik kan deze op heel inter... read more »

Electronics (Polish)

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LPelektronik - lekki szok

by
tak goracym punkcie jak Tesco. zbankrutuje Tesco ;) http://www.lpelektronik.com/module/article/152 -- Piter read more »

Electronics (Swedish)

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En fundering över 'Donald Cook' och högteknologi

by
internationellt vatten i Svarta havet. Det har kommit uppgifter om att riskera livet. http://sdelanounas.ru/index.php?module=Blogs&action=View&id=48815 read more »

Electronics (Danish)

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Montering av SMD

by
ed montering av SMD, kan vi bruke lim, pasta av tin, harpiks, isopropanol +, +. HM + read more »

Microcontrollers (Russian)

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Rules

by
(fido7.)su.hardw.other http://crutch.fatal.ru/?s=ru_embedded read more »

Electronic Circuits (Russian)

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Олдовая схема

by
Hello *All* http://www.chipinfo.ru/literature/radio/199811/p46_47.html http://www.youtube.com/watch?v=hktt5nD0xI4 read more »

Electronics Hobby (Italian)

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amplificatore AUDIO Siemens

by
Un amico vorrebbe reperire il manuale d'uso ,o al limite di servizio,di questo amplificatore marcato Siemens http://it.tinypic.com/r/2ir4uqg/8 peraltro perfettamente funzionante,non l'ho mai sent... read more »