| Sound meter microphone |
Is there any particular reason why sound level meters have some sort of housing for the electret. Is it a cosmetic thing so that people will know where to point with the meter, or is ...
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| low pass splitter |
Hello. Can anybody tell me what a low pass splitter (german: Tiefenteiler) does? Thank you Sincerely Lore
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| Cad Design |
Hi Group anybody know of any good (Possibly Free) Electronics CAD, Design and/or simulation programs? Any Links? Anybody suggest any cheap retail version? Many Thanks <...
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| Newbie Learning PIC Programming |
Hey Group, Im looking at learning to Pic program. Ive seen this: http://uk.farnell.com/jsp/catalog/viewproductdetails.jsp;jsessionid=TWIO35CI1QVO3QFIAEXSFE4AVAAS4IV3?prodId=120030 ...
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| Inductor question |
Hi everyone. I have a question about inductors I hope someone can help me with. It is for a physics lab and I am not too familiar with them. I had imagined that they would have two leads lik...
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| Cyborg ISAAC manual. |
Looking for a Cyborg ISAAC manual. Can anyone help? Can anyone recommend any user groups to browse?
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| microcontroller for FFT |
I'm looking for a microcontroller that can sample audio and do a FFT for freq 400hz->4khz. I need the fund freq and the amplitude. What is a good processor to look at?
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| ba301 |
Does anyone know of any books which contains circuits which use the ba301 ?
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| Reversible Motor confusion |
I have just been given a very nice South Bend 9" metal lathe and have found that the motor is apparently not wired correctly. The motor is a GE model 5KC 43MG and is made reversible by a Cu...
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| LM311 queries.. |
hi, Cant experiment this out at present so am asking u ppl the following : If i leave one of the input pins OPEN and apply an input voltage to the other ... wht will b the ...
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| shielding for current stability? |
I am using AD592AN temp sensors. Connected via split up ribbon cable type wire , +12V on the high side, voltage divider on the low side> 120K/22.1K / AGND, resulting 2.something volt...
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| vu meter, is it linear ? |
Is the "needle device" (I think it is called a vu meter) of a sound level meter is it linear, if so, how do we get a non linear scale, namely -10 at extreme left, zero in the middle, an...
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| long term trickle charging NiCad batterys |
I have an application where I am using a two cell 2300 mAh NiCad battery as a backup power supply for a sensor. The system will be out in the field and running off AC power most of the time...
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| How to determine wire gauge. |
I salvage electrical wires from dishwashers, cars, and heaters. I keep only the ones that can power large motors, fans or anything that demand high current and power. The wires look and...
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| cheap card reader. |
I'm basically trying to make a CHEAP card reader. Basically I want a way to read ID off a card. Now I can use some meory chips and give a card an ID but then I'd have to provide it clock cyc...
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| Power supply 'return' confusion |
Hi, I've got a piece of equiptment lying around here which I need to bring alive. However, the naming on the power supply confuses me. It says : -48 volt <...
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| FS Ad - Electronic Components including TIL311 Hex Displays, LEDs & TTL Chips |
All prices are in US Funds. QTY. Part # Unit Price Description ---- --------- ---------- ----------- OPTO.: 94 TIL311 $7.00 ea. The TI TIL-311 is a Hexad...
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| Why Won't a Frozen Battery Start a Vehicle. |
A battery that is perfectly good why when it is -30C won't it start a vehicle. Please note we are referring to a perfectly good battery and a totally functioning car. What is happe...
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| converting square waves to sine waves? |
I have a home built square wave generator, and I would like to be able to build a circuit that will convert a square wave to a sine wave of approximately the same frequency. I have googled f...
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| Inverter transformer question |
I'm looking for a transformer (or some other passive device) that will step-up the 2 volt max. RMS speaker output from my PC to about 70-90 volts RMS. I want to simulate a telephone ringer v...
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| 2 stage amplifier |
Hi, In a two stage microwave amplifer, how so you design the interstage matching network. The first stage already works, and I need to increase the gain. I am not sure how do de...
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| New Design Help Forum |
I just wanted to mention that there is a new design forum at www.designnotes.com. You can post requests for design help and reply to intriguing design problems. Check it out!
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| New Design Help Forum |
I just wanted to mention that there is a new design forum at www.designnotes.com. You can post requests for design help and reply to intriguing design problems. Check it out!
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| Low voltage connector |
Greets to all, I need to pass 12V current from a chassis to a door. I would like the door to have a spring loaded contact that would complete the circuit when the door is closed b...
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| Quick Current Consumption Question |
Hello, I have 2 cameras that have 12v 1000ma "wall warts". I have a 12v 4a regulated power supply that I would like to use in it's place. I plan to add more cameras to it some d...
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| Components for Sale |
300 + items some in manufactureres packets some loose. All untested but have not been used. Includes Transistors chokes diodes zenners Ics The list is too long for here so email me for...
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| Mallory Recto Power supply |
I have a really old benchtop power supply, an Mallory model 12RS6D 6/12 volt power supply. When I dug it out of storage I noticed the cap to the fuse holder as well as the fuse was miss...
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| MAX232 testing |
I stuffed up while building a cable for my casio calculator. The circuit http://hw.cz/english/constrc/casio/casio_en.html uses a MAX232. The prob is I initially soldered up the...
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| parallel port wiring confusion |
Most of the pinouts for various cables I've come accross do not denote wether the connections are for the parallel port or the parallel port cable connector. Is the numbering scheme on ...
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| ba301 |
This is another question about the ba301 (calling Michael Terrel if available) Since the NTE 1135 is a replacement of the above I need if the pins are exactly the same, i.e. can I...
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