hello everybody, i am a student doing my btech in applied electronics.i want to improve my knowledge in circuits, do some projects too.can anybody help me with...
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tma42001@...
Sep 4, 2001 11:55 am
Hi, At the moment we are working on an electronic project for school. The only problem is that we are still having some difficulties. Can someone help us? How...
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Jamal Awwad
jamalawwad@...
Sep 4, 2001 3:22 pm
Hi, the reason that these transformers output more than stated voltage is .... : most of these cheap wall adaptors are NOT regulated, when they are not loaded ...
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Tobias_Keizer@...
Sep 5, 2001 11:25 pm
Hey all, Newbie looking for some help here... I've recently installed some lights and a sound system in a shower cabin and found myself reluctant to put a 110V...
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Tobias_Keizer@...
Sep 5, 2001 11:43 pm
Please see Image01.jpg file section......
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Jonathan Luthje
jluthje@...
Sep 6, 2001 4:50 am
I doubt whether it is just my email reader - but possibly you forgot to attach said file again? J0n ... From: <Tobias_Keizer@...> To:...
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Troy C
troy1@...
Sep 6, 2001 5:00 am
I think he means it's in the files section of the group. http://groups.yahoo.com/group/Electronics_101/files/...
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Jonathan Luthje
jluthje@...
Sep 6, 2001 5:08 am
In any case, I think your actual question actually relates to noise reduction in power supply circuits. I'm not exactly sure why you would use 555 timers as a...
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Jonathan Luthje
jluthje@...
Sep 6, 2001 6:47 am
After having looked at your circuit (sorry ppl'z ... didn't realize that the file was on the web page ... oops) You definately do not need a semiconductor to...
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mrostamy@...
Sep 6, 2001 9:35 am
Hi! Your post is very interesting. In order to do the transformation you require you need to decide some more characteristics of your sistem. How many colours...
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Tobias_Keizer@...
Sep 6, 2001 8:12 pm
Hey There, Thanks for your reply. One question though, what's an SPDT relay? The problem for me is that I live in Costa Rica where they don't sell anything...
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Tobias_Keizer@...
Sep 6, 2001 11:04 pm
Hey There, Sorry to butt in, but maybe it's at least a bit helpfull... I think the actual bitstream as you suggested would be more like: 8 * 240 * 180 * 5 =...
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Jonathan Luthje
jluthje@...
Sep 7, 2001 12:00 am
An SPDT relay is the term for "Single Pole, Double Throw" It means that you have 5 pins on the relay: Coil Power Coil Ground Contact Centre Normally Open...
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Tobias_Keizer@...
Sep 7, 2001 12:14 am
Hey, Err... Hmm... But would that work with push buttons? Remember I am using my super-startrek-like-push-button-panel... And I am ofcourse using a relay to...
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Jonathan Luthje
jluthje@...
Sep 7, 2001 4:00 am
Pushbuttons are all well and good, if you use the circuit previously attached, then yes the pushbuttons will work just great - you use one pushbutton to latch...
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Tobias_Keizer@...
Sep 7, 2001 4:30 am
Hey There, I'm not too bright, don't really get how that would work with the relay I think you're talking about. Remember these push buttons send a pulse, they...
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Jonathan Luthje
jluthje@...
Sep 7, 2001 4:46 am
If you have a look at the circuit, you will see what I am talking about. When you push the "on" button, the relay closes it's contacts, which connects the +5V...
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Tobias_Keizer@...
Sep 7, 2001 6:29 pm
Hmm... I think I actually got it! Thanks. Unfortunately I'd still have the problem that I can't make a normally closed pushbutton the way I made the normally...
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doogdoog@...
Sep 10, 2001 2:33 am
Aloha, is there a way to make a circuit that varies the output voltage like a variac? The input voltage will be 120v and I want the output to be from 0-120v...
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Jonathan Luthje
jluthje@...
Sep 10, 2001 3:02 am
What is the application you have in mind? It would be rather difficult to perform on AC power - but if you just need power control (as opposed to voltage...
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doogdoog@...
Sep 10, 2001 3:43 am
Aloha, I am planning to make a simple spot welder and I want to vary the input voltage so that the output can be varied to different metal thickness. I have...
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doogdoog@...
Sep 10, 2001 3:46 am
Aloha, I sent a reply a little while ago but looks like it didn't go. Well I am trying to make a spot welder using a 120v transformer by rewinding the...
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Jonathan Luthje
jluthje@...
Sep 10, 2001 4:41 am
Hmmm ... I would suggest that you actually need current control, rather than voltage control - which can be done with SCR's (Silicon Controlled Rectifiers) -...
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mrostamy@...
Sep 19, 2001 12:54 pm
Hi! Well I guess I messed up with the calculations! Sorry! I dont know what was on my mind......
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adityan007@...
Sep 24, 2001 1:27 pm
hi everybody i plan to make a digital clock.the display will be 7 segment LEDs. what I Cs can i use for accurate pulses which will drive the clock. anybody has...
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adityan007@...
Sep 24, 2001 1:32 pm
hi everybody i plan to make a digital clock.the display will be 7 segment LEDs. what I Cs can i use for accurate pulses which will drive the clock. anybody has...
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Bala shankaer
yennavalae@...
Sep 27, 2001 5:50 pm
hi adit why donn't u use a Micro chip IC for that? i had done it as a mini project use 14541 IC as a clock generator in astable mode. u can use PIC16F84 for ur...
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Tako Oda
toda@...
Sep 28, 2001 6:48 pm
Hi! I just joined today, and have a beginner question: I read that in a parallel circuit, voltage is the same across all parallel branches of the circuit......
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Larry Hendry
hendrysr@...
Sep 29, 2001 4:39 am
Tako, What you have read is true. What you have drawn below is not a parallel circuit. In a circuit of parallel resistors, both ends of each resistor would...
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mrostamy@...
Sep 29, 2001 4:44 pm
Hi! Tako placed a very basic question, and Larry very nicely put the answer...where do you get the art for designing circuits in TXT?? However I would suggest...
