Hobby Electronics Basics

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battery capacity

Hi all, I am using lithium thionyl chloride batteries. I want to know how much of charge is left in it after some usage...
1 comments posted 15yrs
posted by wills.kingspanama
1 comments posted 15yrs posted by wills.kingspanama

USB device interfering AM radio

I just discovered this. And I also found that the AC to USB power adaptor does not have a metal ground pin. So would th...
10 comments posted 15yrs
posted by toylet.toylet
10 comments posted 15yrs posted by toylet.toylet

Computer Diagnostics

How useful (in your experience) is a PCI diagnostic card (post card)? I know the cheap PSU testers are a waste because I...
5 comments posted 15yrs
posted by pheeh.zero
5 comments posted 15yrs posted by pheeh.zero

PCBs stack Insulating

HI, I have 2 PCBs stacked with standoffs the one on the top is a SMPS, and the one on the botttom has some TH component...
10 comments posted 15yrs
posted by ee.jcesar
10 comments posted 15yrs posted by ee.jcesar

Hi capacity rechargeable AA Batteries?

I see numerous offers for rechargeable AA batteries on Ebay. I bought a set of 4 advertised at 2500 maH, but turned out...
21 comments posted 15yrs
posted by bperryb
21 comments posted 15yrs posted by bperryb

Powering an IR2155

Hello, I'm having a little trouble understanding how to power an International Rectifier IR2155 half-bridge self-oscill...
3 comments posted 15yrs
posted by peter.j.torelli
3 comments posted 15yrs posted by peter.j.torelli

How to supply a 40V LED driver from mains?

Hi all, I want to install some microcontroller based mood lighting using high- flux Cree LEDS. Most of the interesting...
13 comments posted 15yrs
posted by dwtowner
13 comments posted 15yrs posted by dwtowner

rc potentiometer

I have some hydraulic machinery controlled via a 5kohm pot, an amplifier, and solenoids etc. I'd like to control wirele...
4 comments posted 15yrs
posted by cormorant
4 comments posted 15yrs posted by cormorant

Extend length of DC motor wires?

An 18 V cordless drill motor. Can the wire be extended to about 3 feet from the battery to the controller and from the...
14 comments posted 15yrs
posted by jdoe
14 comments posted 15yrs posted by jdoe

Human body capacitance

I was playing around with a piece of wire stuck into my 'scope input. Looking at all the electrostatic interference aro...
13 comments posted 15yrs
posted by gherold
13 comments posted 15yrs posted by gherold

New Spice simulation community

Hi, we are creating a community of electronic design and simulation for users of different types of SPICE, PSpice, LTsp...
0 comments posted 15yrs
posted by studio21hundred
0 comments posted 15yrs posted by studio21hundred

Test coaxial cable

Is there a way to test an in place coaxial cable ? It provides cable service to 3 different points and some of the chann...
7 comments posted 15yrs
posted by chocolatemint77581
7 comments posted 15yrs posted by chocolatemint77581