Hobby Electronics Basics

  1. Home
  2. Hobby Electronics Basics
9387 Threads Posts
to

Worth reading in Hobby Electronics Basics

Crazy candle project

Well , I'll put this crazy problem forward and see what comes back. The project is to have a candle (modified or 'gimmi...
12 comments posted 21yrs
posted by bolwarra5
12 comments posted 21yrs posted by bolwarra5

determine how long led will stay on w/ bettery

I would like to calculate how long an LED will stay lit given a specific power source. I need to know what the smallest...
12 comments posted 21yrs
posted by SteveKlett
12 comments posted 21yrs posted by SteveKlett

Why can't we use non-electrolytic capacitor ?

We knew that all the Aluminium Electrolytic capacitor having shelf life of 5 year according to the mfe standard.( Due t...
9 comments posted 21yrs
posted by mowhoong
9 comments posted 21yrs posted by mowhoong

Coil Winding Trouble

We have an exhibit at our local science museum that is a 3-4' 1" diameter tube with about 150' of wire wrapped around 8...
8 comments posted 21yrs
posted by wolf_tracks
8 comments posted 21yrs posted by wolf_tracks

Noise problem I think

I have 4 of these 16 bit serial LED drivers hooked together on solderless proto boards. http://www.allegromicro.com/dat...
2 comments posted 21yrs
posted by 1qazse4
2 comments posted 21yrs posted by 1qazse4

Wall-Warts Power Usage and Power Supplies

The main point of my question is to get a general idea on what kind of power usage AC power adapters consume when plugg...
3 comments posted 21yrs
posted by wanton
3 comments posted 21yrs posted by wanton

charging batteries

Can I use my dc power supply to charge rechargable batteries? Not AA's but something like a motorcycle battery. Thanks,...
1 comments posted 21yrs
posted by raul
1 comments posted 21yrs posted by raul

Data/Address line Matching

Hi, I am going to design a DSP system which needs to interface with SDRAM. The system clock is running at 200MHz. I hav...
4 comments posted 21yrs
posted by eehobbyist
4 comments posted 21yrs posted by eehobbyist

Why the neutral in USA wiring?

I was showing a guy how to wire a lamp and explained how only one wire was switched, and that wire was the hot. The neu...
21 comments posted 21yrs
posted by etpm
21 comments posted 21yrs posted by etpm

are potentiometers very heat sensitive?

It seems like I keep damaging the pots when I'm rewiring them in my electric guitars or my amps. I'm assuming the heat...
5 comments posted 21yrs
posted by clintonb
5 comments posted 21yrs posted by clintonb

Pull up resistor

Will someone tell me if I am doing this right? I am using the calculations on this page http://www.interfacebus.com/IC_...
7 comments posted 21yrs
posted by 1qazse4
7 comments posted 21yrs posted by 1qazse4

Question About IC Chips

Should the used pins be left unconnected or should they be taken to ground?
44 comments posted 21yrs
posted by <elehman1
44 comments posted 21yrs posted by <elehman1

single supply opamp

I am simulating a single supply opamp in an inverting opamp configuration with gain set to 1. I/P is an ac sine 200mVpp...
1 comments posted 21yrs
posted by mister.steve.smith
1 comments posted 21yrs posted by mister.steve.smith

Testing batteries

Hi, Can I test AAA, AA, C, etc. batteries to see if they're good, like car batteries. Check the voltage and get for ins...
4 comments posted 21yrs
posted by js5895
4 comments posted 21yrs posted by js5895