Hobby Electronics Basics

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Reflow soldering on a custom PCB

I recently had some through hole custom PCBs made by http://custompcb.com. Everything worked great. Now I am thinking t...
8 comments posted 21yrs
posted by 1qazse4
8 comments posted 21yrs posted by 1qazse4

fifo memory

I want to make some io interface which can read/write 64 bitpatterns from/to the LPT port. The FIFO must be synchronize...
1 comments posted 21yrs
posted by quadran
1 comments posted 21yrs posted by quadran

embedding ERICSSON T10s board

Hi, I want to use a ERICSSON T10s board (from disassambled phone with LCD) in one of my projects. How can I powering up...
1 comments posted 21yrs
posted by rbogubaev
1 comments posted 21yrs posted by rbogubaev

Beginner Questions

Hello. I'm getting back into electronics after a long abscense, and I need some help. Does anyone know where I might fi...
3 comments posted 21yrs
posted by julian814
3 comments posted 21yrs posted by julian814

Amplifier transistor matching?

I am trying to fix an old Marantz 2245 stereo. one of the amplifier blocks had severe distortion problems. On inspectio...
168 comments posted 21yrs
posted by cor
168 comments posted 21yrs posted by cor

iriver mp3 car charger problem

Hi there, I have an iriver mp3 player. Its a H100 series 15G player. I lost my mains charger and wanted to charge it. I...
3 comments posted 21yrs
posted by jezek2003
3 comments posted 21yrs posted by jezek2003

Solar powered LED project questions

Hi all I'm pretty "green" when it comes to electronics so i'll appologise in advance for my ignorance. =) I'm intereste...
1 comments posted 21yrs
posted by chrislev
1 comments posted 21yrs posted by chrislev

"Trip Wire"

I want to make a flood light on the side of my house come on when a circuit is broken. I want to attach a low voltage w...
17 comments posted 21yrs
posted by WilliamJHeffernan
17 comments posted 21yrs posted by WilliamJHeffernan

Looking for miniature pH sensor

Hello, I am looking for a miniature pH sensor (less than 1 cm^3). Does anyone know manufacturers of miniature pH sensors...
1 comments posted 21yrs
posted by sgn_removethisx
1 comments posted 21yrs posted by sgn_removethisx

New circuit design for home project

Hello group, Is there anybody here that could help with a design for a small circuit to control 3 relays ? I can provide...
6 comments posted 21yrs
posted by noreply
6 comments posted 21yrs posted by noreply

Couple of basic questions regarding power supplies

Hi - I'm going to be using a Bias Power BPS-200-2-14-50: http://web.archive.org/web/20050601113831/http://www.biaspower...
3 comments posted 21yrs
posted by mnoone.uiuc.edu
3 comments posted 21yrs posted by mnoone.uiuc.edu

PCB drilling question

In commercial CNC setups, is the drill motor powered during the entire drilling operation (except tool changes) or is it...
2 comments posted 21yrs
posted by oparr
2 comments posted 21yrs posted by oparr

Random ON/OFF Timer Circuit

Hello All I was wondering if anyone can help with or knows where I can find a random ON/OFF timer circuit that will swi...
11 comments posted 21yrs
posted by tmcmurtrie
11 comments posted 21yrs posted by tmcmurtrie