Circuit Electronics » capacitor

Need help solving Electronic Engineering questions?

admin — Tue, 13 Jul 2010 05:04:46 +0000

Asuem no current flowed in the series RC cirvuitbeacause of an open circuit.How could you quickly determine if the resistor or the capacitor were open?

What electronic component is abbreviated "RA"?

admin — Tue, 15 Jun 2010 15:05:51 +0000

I saw a circuit board today with a component I haven’t seen before and can’t find online. It looks like a cross between an IC and a capacitor. It had 8 pins all in one line and there were black ones and red ones.

circuit board on an electronic gate opener. I have a resistor i think that has been burnt in two.?

admin — Sun, 18 Apr 2010 07:12:11 +0000

I think it is a resistor, but might be a capacitor or something else. It is beige in color with no color bands on it, i know usually a resistor has color bands on it. Also the resistor ones on the circuit board has color bands, and is called with the letter R in front of it, the one that I need to replace has a C in front of the circuit number. Can anyone tell me how to determine what to get on this? Its not long and skinny like most resistors, with color bands, its about 3/16" long and almost egg shaped. There is a 1.5 amp fuse on the board that blew, i could only find a 5 amp to replace. I know that is why it probably burnt in two, do have the correct fuse now. Thanks
On the burnt one, the best i can tell with a magnifing glass is it has this on it.
RSC 104
Some of the other ones that look the same has this on them as well, though hard to tell even with a mag glass.

electronic circuits please help?

admin — Thu, 18 Mar 2010 02:26:29 +0000

with the transistor, thermistor and capacitor, can you show me how to make a circuit which:
a) turn on an alarm when the temperature is reached to 40 *C
b) turn one alarm 9 seconds after the contact is activated.

Thanks

could you tell me the answers to these electronic questions?

admin — Sat, 07 Nov 2009 14:05:10 +0000

1) three types of inductors in electrical circuits?
2) TWO application of the capacitor in a simple transistor amplifier circuit?

Is clear flux solder ok to use to solder onto a lcd tv circuit board?

admin — Sat, 07 Nov 2009 06:14:21 +0000

I want to make sure that this 60/40 clear flux solder from radioshack (.063") won’t damage my tv. I need to replace a capacitor on my 37" lcd magnavox. Would rosin core be better?

Electronics question..?

admin — Sun, 11 Oct 2009 16:21:31 +0000

Ok so a friend and I are having a disagreement.. He says a "switcher" opens and closes circuits, while I think its a transistor.

heres a copy of the question. A(n)____, Which is contained on an integrated circuit, can act as an electronic switch that opens or closes the circuit for electrical charges..

Also might be a capacitor..

How much voltage is there in a Capacitor?

admin — Wed, 23 Sep 2009 21:20:50 +0000

Hi, i’m having a little trouble. A schematic diagram of a 3-band equalizer is on this link: http://freecircuitdiagram.com/2008/11/25/3-band-graphic-equalizer-circuit/

Here’s a story. I went to a local electronic shop to buy the parts needed for that 3-band equalizer. When I asked the vendor for the capacitors, he asked me, "how much is the voltage? what kind of capacitor do you need?" and i just said, "i don’t know". The supply needed is 12V DC and the values of the capacitors are:

0.1uF
47nF
4.7nF
0.47nF
22nF
1nF
33uF

I’m sorry but I’m such a noob at this, but I’d really really appreciate it if anyone can help or tell me if there’s some sort of formula for this.

Thank You very much

Electronic Element Starting with Q?

admin — Thu, 20 Aug 2009 08:02:31 +0000

What is the full name of an Element starting with Q?
On a circuit board there are labels. For example for resistors it is "R", for diode "D", for capacitor "C" what is "Q" for?

Troubleshooting a failed AC adapter?

admin — Thu, 30 Jul 2009 06:03:28 +0000

I am requesting support from someone who knows electronic power circuits. I have an AC adapter, input 120VAC, two outputs: 32VDC & 16VDC. I connect a voltmeter to either output and when I plug it in, output is instantly correct but then slowly reduces to zero asymptotically. It will not deliver any output again until is it unplugged and plugged it again. It then jumps to the correct output, then repeats the slow reduction to zero. I know enough to suspect that the slow fade-out is a DC capacitor discharging but beyond that I don’t know what components to check or how (other than one-way continuity of diodes, resistance of resistors, etc. I have completely eliminated the possibility that it’s a faulty connection or power cord.