Hobby Electronics Basics

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mutual capacitance?

A network theorem states that every circuit has a dual; voltage sources become current sources, etc. But, what about mu...
113 comments posted 15yrs
posted by r_delaney2001
113 comments posted 15yrs posted by r_delaney2001

A New Twist in My GFI Story

I think this calls for the replacement of another GFCI (GFI). Same story above the "Voltage Drop Along a Long Cord". 14...
3 comments posted 15yrs
posted by wolftracks
3 comments posted 15yrs posted by wolftracks

Drive a 555 with an op amp

Hi every one I am a new bie. I am a bit rusty on my electronics as I trained 30 yrs ago. I am making a small project fo...
4 comments posted 15yrs
posted by tony.mansell
4 comments posted 15yrs posted by tony.mansell

USB: Mass Storage + RNDIS

Hi ! I implemented an RNDIS interface on my LPC1768, and it works, which is okey. On the host, users are just required...
1 comments posted 15yrs
posted by bertrand.roussel
1 comments posted 15yrs posted by bertrand.roussel

Induction Motor Switch-off Transients

I have been experiencing some problems with a power supply unit failing due to transformer faults. These 230V AC input...
3 comments posted 15yrs
posted by rowan
3 comments posted 15yrs posted by rowan

LabView

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I just got the LabView Student edition. I am wondering how difficult...
1 comments posted 15yrs
posted by karitlaine
1 comments posted 15yrs posted by karitlaine

Pulsing to circumvent noise?

Gentlemen: I have an application where I have a large number of lines that transmit square waves across about a six foo...
20 comments posted 15yrs
posted by eromlignod
20 comments posted 15yrs posted by eromlignod

Circuit question

I found a un-used 6.2V AC adaptor, and would like use it to power a USB hub. We all knew that USB takes 5V as input. I...
49 comments posted 15yrs
posted by toylet.toylet
49 comments posted 15yrs posted by toylet.toylet

Voltage drop on a long power cord

I have had a 100' 16 gauge power cord that I've used around our property for various simple needs. Recently, I bought a...
10 comments posted 15yrs
posted by wolftracks
10 comments posted 15yrs posted by wolftracks

Touch Lamp That Turns on Erratically

We have two touch lamps in the bedroom behind the head of the bed on a wall. Sometimes they just go on for no apparent...
3 comments posted 15yrs
posted by wolftracks
3 comments posted 15yrs posted by wolftracks

How to Recover Pictures from Formatted SD Card?

Have you ever encountered the following phenomena? 1. Connect your SD card reader to computer, the window pops up with...
0 comments posted 15yrs
posted by tenorsharedatarecovery
0 comments posted 15yrs posted by tenorsharedatarecovery

TCA0372 1A opamp stability probs?

Anyone used a TCA0372 1A output opamp? Seems prone to oscillate? Does it need some minimum gain to be stable? I'm runni...
11 comments posted 15yrs
posted by bobgardner
11 comments posted 15yrs posted by bobgardner

Mix anti-phase - load on amps

Quick question please. If I have two audio signals from two amps, one swinging entirely above DC and the other entirely...
3 comments posted 15yrs
posted by martinkane
3 comments posted 15yrs posted by martinkane

BJT Base emitter cutoff

How does one know the minimum current that can be used to program the base current for a bjt? Is it the base cutoff spe...
15 comments posted 15yrs
posted by archival998
15 comments posted 15yrs posted by archival998

Rewrite bios through port serial

Hi all It is possible to rewrite the chip bios , with Win XP, with Electronic card, attacched to serial port, or paralle...
22 comments posted 15yrs
posted by pahm
22 comments posted 15yrs posted by pahm