Hobby Electronics Basics

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landscape lighting

We got a 12V outdoor landscape light kit from Big Lots (was about $30). 20 lights, 4W ea bulb, 100W 12VAC switching pow...
30 comments posted 18yrs
posted by mrdarrett
30 comments posted 18yrs posted by mrdarrett

Question about this charge pump

I have some questions about this charge pump: http://img412.imageshack.us/img412/149/chargevn1.png This should give a g...
1 comments posted 18yrs
posted by silusilusilu
1 comments posted 18yrs posted by silusilusilu

power supply explanation

This news group business is a hard path to tread what with cranky australians and americans with money and magical Radi...
22 comments posted 18yrs
posted by haggisz
22 comments posted 18yrs posted by haggisz

full converter dc drive

What is the advantage, if any advantage in using a 4 SCR full converter instead of a 2 SCR,3 diode semi converter in a d...
2 comments posted 18yrs
posted by sandy261180
2 comments posted 18yrs posted by sandy261180

slo blo/time delay fuse

Is "slo-blo" the same as "time delay"
5 comments posted 18yrs
posted by AFLAM101
5 comments posted 18yrs posted by AFLAM101

LED SOUND PROJECT HELP

Hi, I'm working on a painting that I want to incorporate some electronics into. I want to have a button on the front of...
1 comments posted 18yrs
posted by marxmith
1 comments posted 18yrs posted by marxmith

Potentiometer question

How do you decide what pot to use from the eagle cadsoft library? I need to use a 2k board mount pot and would like to...
16 comments posted 18yrs
posted by billshat44
16 comments posted 18yrs posted by billshat44

long distance sensor around 20 feet help

Repost i know but i'm desperate I'm looking for a distance sensor sub $100 that will range out more than 20 feet. The s...
4 comments posted 18yrs
posted by rkremser
4 comments posted 18yrs posted by rkremser

power supply circuit

I would like to make an adjustable power supply using a transformer with a 24v 5a single wound secondary I would like t...
15 comments posted 18yrs
posted by haggisz
15 comments posted 18yrs posted by haggisz

Simulation of a nonlinear capacitor

Let's assume a nonlinear capacitor with c(v)=dq/dv. The q-v characteristic of the capacitor is given by the formula q=3...
31 comments posted 18yrs
posted by jerry
31 comments posted 18yrs posted by jerry

Alkaline Battery Capacity

Can't seem to locate any battery specs for Alkaline "D" cells. Tried the Duracell and Raovac sites, but couldn't find m...
13 comments posted 18yrs
posted by wrongaddress
13 comments posted 18yrs posted by wrongaddress

Simple Preamp Circuit Needed

I've been looking for a simple (preferably 1 or 2 transistors or IC based) preamp to go between the LM380 amp I mention...
6 comments posted 18yrs
posted by the1930s
6 comments posted 18yrs posted by the1930s

Calculating total resistance?

Hi, I am looking for an algorithm for calculating total resistance of a circuit. The circuit is repersneted using a grap...
2 comments posted 18yrs
posted by tomerdr
2 comments posted 18yrs posted by tomerdr