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| Title | Author | Views/Replies | Posted at |
 Rf Shield ProductsFolks,What is the science behind those RF shielding sprays you can get these days. They contain some nickel flakes and are conductive. Supposedly sprayed inside the box to be shielded protect content ... |
398338 | 2/3 | 2008/9/3 22:44 |
| Transistor Equivalent I'm trying to build a treble and bass booster for an electric guitar, but the transistor that it needs, a Germanium 2SB175, is no longer available. Would anyone know what I can use in its place? Thank... |
fusarium | 2/3 | 2008/9/3 20:25 |
| Scope Calibration I need to get a tektronix scope calibrated for work. Should I send it in to Tektronix or try to find someone local to do it. |
ken7976 | 2/13 | 2008/9/3 21:44 |
| Looking for 12V stopwatch in the US Hello everyone. I'm looking for a source (not to build one btw) for a 12V DC digital stopwatch. It should read at least in .00sec, .000 would be a plus, and be able to be started and stopped by applyi... |
addxjyx | 4/4 | 2008/9/3 21:42 |
| Car light Hello guys!I am am gonna supe-up my little toy car ! Ok its the ones that you ride in. I wanna add head lights, break lights, fog-lights, turn signal and I wanna make it more powerful cuz its a bit s... |
hgping | 4/11 | 2008/9/3 21:01 |
| power supply Hi. Let me start by saying I am very electronicaly challanged so please reply in plain english please.I need to power 400 led's with the specs below on one power supply. Is it possible? I have a 10... |
nnxd | 18/29 | 2008/9/3 20:27 |
| step down regulator LM3524N output voltage drop why my step down switching regulator LM3524N ouput voltage seen drop after few second????? i set the Rref at 15kohms, therefore the output voltage should be 10v, but this value jus stand about 10secon... |
fujun2013 | 3/3 | 2008/9/3 20:35 |
| Help: What electronics can go overseas? Help! I'm moving from Canada to Holland and need to know what items can be converted to work overseas without a transformer. Does anyone know? For, example, can I convert my playstation to accept 22... |
mxg330 | 2/15 | 2008/9/3 20:46 |
| ESD test reference Hi, lately i need to run an ESD test, but i have no idea how to run it correctly and how to prepare the test report. Is there anybody can give a piece of advice or any related material, such as relate... |
nnxd | 4/1 | 2008/9/3 21:09 |
| Woot Hey guys and gal, I got a new project to have a crack at ... its a digital voltmeter.Specs3.5 digit resolution (7 seg display with decimal and sign)AC(true RMS)/DC VoltageAC(True RMS)/DC CurrentResist... |
rickli | 3/2 | 2008/9/3 20:37 |
| 14.8v Battery To Power A 12v Device? Hi everyone!As I'm very new here, I did post a quick introduction in the appropriate forum, and now I'm posting my question here. I'm building an audio system for my bicycle, using a 12v amplifier tha... |
dongyea | 3/5 | 2008/9/3 22:50 |
| Um232r (usb To Rs232) Send Works, But Not Reveice I got a um232r (the whole shebang, not just the chip but the actual usb port and all, in case you know which one I'm talking about).I have had a problem with receving data from the pc for a while now ... |
lassa | 3/8 | 2008/9/3 22:38 |
| Transformers, induction, flux and times... Ok what I have is a vanilla junk step up transformer with metal core 1:100. If I feed a frequency of 300Hz 0V to 5V @1ms square pulses through its primary, I need to calculate at what time (after the ... |
nnxd | 3/6 | 2008/9/3 21:57 |
| Resistor HiIve been wondering what the value of this resisitor is(), I took GCSE electronics but we only studied 4 band resistors and this is confusing me.Thanks.Dan |
ken7976 | 3/11 | 2008/9/3 20:19 |
| Sren System says he's 50!Happy birthday dude. |
btcdtc | 3/11 | 2008/9/3 22:38 |
| Cold Cathode DImming Hi, I have these 12v streetglow neon lights in my car under my dash. I think they are cold cathodes and are wired to a small inverter box. I know that you can turn these on and off rapidly because i h... |
booksir | 3/2 | 2008/9/3 21:03 |
| chip protection If I was wanting to use a ramp voltage as an input to a chip or micro-controller (using VHDL) to have the input voltage ramp from 0V to 5V(input high) and drop back to zero, would i need some sort of ... |
chdd | 3/2 | 2008/9/3 20:59 |
| Circuit to select between two power sources Dear all,I have a solar powered circuit with a dc regulated output and a rechargable battery, and want to be able to automatically select the best of those two upon voltage level conditions (i.e.alway... |
fujun2013 | 3/3 | 2008/9/3 20:43 |
| Momentary Contact Rely I am new here and have a basic electronics understaning (very basic). I have an electronic device that has seperate on/off switch and start/pause switch. I would like to activate it via a timer, but y... |
fusarium | 4/7 | 2008/9/3 22:23 |
| Digital Alarm Clock Project.... hiI have an project (DIGITAL CLOCK WITH ALARM)i made it on bread Board after i load source code in HEX format into microcontroller 8051 and start i have an blincking in some part of LCD i don't know h... |
fusarium | 2/10 | 2008/9/3 21:26 |
| Problem with basic stamp driving a pump I have a basic stamp 2 controlling power to a small 12dc water pump. The basic stamp outputs to a relay. When the Pump goes on it is supposed to stay on for ten minutes. Then it is suppsed to stay ... |
nnxd | 3/5 | 2008/9/3 21:14 |
| This will be easy for someone out there... I have a problem as follows:A friend of mine has a sounder wired up (i think it's called a piezo sounder, you know, like the brass disc with a white disc in the middle of it) to let him know when some... |
ybyygu | 12/12 | 2008/9/3 20:56 |
| very simple question Hi, can anyone explain the voltage on the first resister, i thought it would be a potential divider between R1 and ((R2xR3)/(R2 R3)) amking r1 1k and the other r2 equaling 500ohm, making r1 6v and and... |
nnxd | 3/6 | 2008/9/3 21:02 |
| Problem in Audio, detect AM Freq. elow all!i have a problem in a sound system in my schooll, evrytime we use skype chatt messenger or audio sounds and together with the sound system. there is a AM Frequency insert or a any sounds like... |
398338 | 2/3 | 2008/9/3 22:03 |
| Newbie Hello folks,new to the forum from Scotland and thought id introduce myself.Thought id join the site to try and get some pointers on my upcoming oral presentation on amplifier...for 10 minutes! Mission... |
ct731 | 3/6 | 2008/9/3 22:30 |
| gluing SMD components Hi guys.Is there any problem gluing SMD components with normal glue before soldering?Or I have to use some special glue? Cheers. |
netlgc | 5/11 | 2008/9/3 21:51 |
| Software Defined Radio (SDR) For the ones interested in a Software Defined Radio, check the link:http://www.elektor.com/magazines/2007/may/...dio.91527.lynkxThe article and the PCB draw is free for download.Cheers. |
pdang | 2/3 | 2008/9/3 22:00 |
| Mebbe In Florida, But... Man what a society of pussies we've become! There's a whopping maybe 2mm of wet snow on the road and the temperature is, oh - maybe -2 (31F) at worst. On the drive in all I've heard is winter storm wa... |
z315 | 3/9 | 2008/9/3 22:22 |
| Inductors when you have a coil that's wound really tightly so that all the turns touch each other, why doesn't the current flow through the edges of the wire and basically go straight from one end to the other ... |
hgping | 5/12 | 2008/9/3 20:27 |
| electronics buzzing sound hi i have a laptop, some external speakers and an external hard drive. when i connect both the laptop and the speakers there is a buzzing sound can you tell me why this is so? and how can i solve this... |
nnxd | 4/6 | 2008/9/3 21:40 |
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