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Re: Transistor identification?

>>> I can say that the bandwidth requirement of the circuit is very small?DC-10 >> KHz?and low current. Don?t know abou...
0 comments posted 11yrs
posted by gfretwell
0 comments posted 11yrs posted by gfretwell

IDFT transform

If we have DFT coefficients, we can reconstruct the signal by using IDFT transform. Read more: http://www.cirvirlab.com...
0 comments posted 11yrs
posted by pchung705
0 comments posted 11yrs posted by pchung705

Parallel R-C circuit impedance

It is obvious that with signal frequency increase, impedance of parallel R-C circuit decreases, since impedance of the...
0 comments posted 11yrs
posted by pchung705
0 comments posted 11yrs posted by pchung705

Proxxon NG5E transformer

When I turn it on the Red light is on. Neither the saw or rotary attachment is working. I have turned it off for 30+ min...
0 comments posted 11yrs
posted by Darlene Tetarenko
0 comments posted 11yrs posted by Darlene Tetarenko

MOV Engineer position in Pittsburgh, PA area

Empyrean Services is seeking qualified candidates for 18 month MOV Engineer position at Westinghouse in Cranberry, PA (...
0 comments posted 11yrs
posted by blempyr
0 comments posted 11yrs posted by blempyr

Condenser fan motor substitute

I have a very old carrier condenser. I need a replacement fan motor. The current motor is a 5kcp39bg GE unit with the f...
1 comments posted 11yrs
posted by stryped1
1 comments posted 11yrs posted by stryped1

Automatic cutoff for cheap 12v battery charger

I've been given a 12v battery charger that doesn't have a cutoff on the boost mode, so there is a risk of boiling the b...
2 comments posted 11yrs
posted by AussieBarry
2 comments posted 11yrs posted by AussieBarry

Is USB polarity important?

USB uses differential signaling, D- and D+ signal lines. Since it?s differential, is absolute polarity important? If, f...
8 comments posted 11yrs
posted by not
8 comments posted 11yrs posted by not

Driving optocouplers

http://pdf.datasheetcatalog.com/datasheet/vishay/83725.pdf The output transistor of the 4N25 optocoupler is spec?d at m...
7 comments posted 11yrs
posted by not
7 comments posted 11yrs posted by not

Diode Usage In Small dc Motor: Why ?

Hi Folks, I'm not an EE, so would really appreciate someone educating me a bit on this. Trying to fix kids toy. Very si...
2 comments posted 11yrs
posted by rgsros
2 comments posted 11yrs posted by rgsros

Grounding at service entrance

Hello, all. As an EE what should be a simple electrical circuit/networks question has me puzzled as to the rationale, a...
18 comments posted 11yrs
posted by arl_123234
18 comments posted 11yrs posted by arl_123234

DIN rails and diodes

I am building an industrial sensor system for warehouse and need to isolate some inputs using blocking diodes (simple r...
6 comments posted 11yrs
posted by not
6 comments posted 11yrs posted by not

Moisture in Magnesium Oxide insulator

Hi All I work with electric heaters and have a problem with moisture getting into the element, causing the insulation r...
4 comments posted 11yrs
posted by tannersgreen
4 comments posted 11yrs posted by tannersgreen

Low voltage switch wiring question

Hi, cabinets. I have a toggle switch that I would like to install between the low voltage line and the lights. Should I...
5 comments posted 11yrs
posted by nospam
5 comments posted 11yrs posted by nospam