Hobby Electronics Basics

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water analogy- a simple calculator

Hello, I'm a designer, and I don't know much about electronics and water analogy... But I was wondering if a very basic...
170 comments posted 15yrs
posted by vaillyth
170 comments posted 15yrs posted by vaillyth

LT Spice help with nodes

Just learning LT-Spice. Drew simple diagram with ground, battery and a few resistors. Did the simulations and got volta...
4 comments posted 15yrs
posted by ivanvegvary
4 comments posted 15yrs posted by ivanvegvary

Point Contact Transistor Oscillator (2N110)?

I'm trying to make an oscillator circuit using an old 2N110 point contact transistor (PNP) from the 1950s. Found a few...
7 comments posted 15yrs
posted by bperryb
7 comments posted 15yrs posted by bperryb

Xmas tree incandesent's die as

Xmas tree incandesent's die as dead shorts. How da do dat? OK I'm feeling lazy and not searc... George H.
19 comments posted 15yrs
posted by ggherold
19 comments posted 15yrs posted by ggherold

Making cables

I want to make a connection between two project boxes. Forty pins will be involved, so I was thinking that a male IDE c...
13 comments posted 15yrs
posted by Searcher7
13 comments posted 15yrs posted by Searcher7

Specs for charging nicads

I have a Craftsman 14.4 V. rechargeable drill that uses NiCad batteries. It has no ready light, just a charging light....
11 comments posted 15yrs
posted by chocolatemint77581
11 comments posted 15yrs posted by chocolatemint77581

Batteries in the fridge

Anybody remember zinc-carbon cells? IIRC, it was recommended that spares of them be kept in the refrigerator, because t...
24 comments posted 15yrs
posted by richg
24 comments posted 15yrs posted by richg

Led light new

Since on the topic of Led light, I heve been trying to make a diy pocket torch, but the latest available (white) Led wi...
4 comments posted 15yrs
posted by kvsteve
4 comments posted 15yrs posted by kvsteve

convert pspice to xspice

I tried to simulate in Altium MCP6L01 op amp. I don't know how convert the pspice sub circuit to xpsice. Any suggestion...
0 comments posted 15yrs
posted by labirint10
0 comments posted 15yrs posted by labirint10

Step down transformer as a battery charger ?

I salvaged a 9.6 V NiCd battery. 800 mAh Could I use a 9.0 volt transformer to charge the battery? I have one that outpu...
5 comments posted 15yrs
posted by chocolatemint77581
5 comments posted 15yrs posted by chocolatemint77581

LT SPICE PowerPoint tutorial

The books that support this acclaimed tutorial are being revised and the link might soon become invalid. Please get it...
3 comments posted 15yrs
posted by charlesschuler
3 comments posted 15yrs posted by charlesschuler

power on this board?

http://img151.imageshack.us/img151/9116/pinideatahddconverterad.jpg that board has a 4 pin molex connector. those 4 pin...
8 comments posted 15yrs
posted by corneliusy
8 comments posted 15yrs posted by corneliusy

testing voltage on a molex connector

I have one of these connectors. http://upload.wikimedia.org/wikipedia/commons/thumb/3/31/Molex_female_connector.jpg/800...
2 comments posted 15yrs
posted by corneliusy
2 comments posted 15yrs posted by corneliusy

7805 OK to get hot (do I need a heatsink)

I am charging an iPod using a 7805 1amp regulator. With the iPod screen on and charging I am drawing .17 amps. The Vreg...
61 comments posted 15yrs
posted by N
61 comments posted 15yrs posted by N