Hobby Electronics Basics

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diode temperature model

in eq'ns (10.23), (10.24) and (10.27) in the "temperature model" section of http://qucs.sourceforge.net/tech/node68.html...
21 comments posted 17yrs
posted by nospam
21 comments posted 17yrs posted by nospam

Multiplication - Quotient Circuit On SPICE

Or maybe some log exponential circuits. It's hard to find anything in their liberry. Bret Cahill
1 comments posted 17yrs
posted by BretCahill
1 comments posted 17yrs posted by BretCahill

How to Unlock Apple iPhone

ziphone provides the latest software and tools for unlocking your iphone. Here you will get the software through which...
1 comments posted 17yrs
posted by braincool25
1 comments posted 17yrs posted by braincool25

i need an opamp suggestion

can anyone suggest an op-amp for me I need to amplify my guitar signal, which is in the milli-volt range and swings +/-...
7 comments posted 17yrs
posted by panfilero
7 comments posted 17yrs posted by panfilero

Low cost resistor and capacitor pack:

Low cost resistor and capacitor pack: Low cost genuine metal film 1/4W resistor kit, great for electronic fans: 1 ohm 7...
0 comments posted 17yrs
posted by engeecorp
0 comments posted 17yrs posted by engeecorp

Parallel resistors formula

The normal textbook formula for resistors in parallel is given as for two Rt =(R1*R2) / (R1+R2) or for more Rt = 1 / (1...
10 comments posted 17yrs
posted by charlie
10 comments posted 17yrs posted by charlie

How to convert Flash to AVCHD?

E.M. Magic Swf2Avi is the best SWF converter that can convert almost all kinds of SWF to video, audio and image in many...
0 comments posted 17yrs
posted by yummy881117
0 comments posted 17yrs posted by yummy881117

Second Time Derivative Of Current

Is there any name for this other than "Second Time Derivative Of Current?" Bret Cahill
13 comments posted 17yrs
posted by BretCahill
13 comments posted 17yrs posted by BretCahill

3 Phase Motor Voltages

I am trying to make heads or tale of the voltage information on this Bronzoni motor label: http://www.geocities.com/aaa...
2 comments posted 17yrs
posted by aaawelder
2 comments posted 17yrs posted by aaawelder

Minimum Market Price for A Prototype Circuit

The amplitudes of two ~ 1 volt, 1 Hz AC signals need to be divided. Any DC offset or low frequency noise can be subtrac...
2 comments posted 17yrs
posted by BretCahill
2 comments posted 17yrs posted by BretCahill

Interference

I recall reading that if an AM radio is tuned to frequency x plus or minus the heterodyne frequency a radio tuned to fr...
1 comments posted 17yrs
posted by dewhurst
1 comments posted 17yrs posted by dewhurst

Correlated Double Sampling

Hi, I'm looking for a circuit (schematic) with discrete components that allows me to do Correlated Double Sampling at l...
0 comments posted 17yrs
posted by bmw318
0 comments posted 17yrs posted by bmw318

Transformer power usage

I am curious. Does a transformer draw (considerable) power even with no load. I have a cheapo, unregulated 88W 120VAC t...
22 comments posted 17yrs
posted by sdswetmore
22 comments posted 17yrs posted by sdswetmore

Need some advice about a Led switch

I want to use a switch to step through a ten LED string one LED at a time. I also need to bypass a LED (take it out of...
3 comments posted 17yrs
posted by carlecarey
3 comments posted 17yrs posted by carlecarey