Hobby Electronics Basics

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transistors

hi.....can anyone define input and output impedence of a transistor?? and how do you find it out experimentally??
19 comments posted 19yrs
posted by strider014
19 comments posted 19yrs posted by strider014

Amperage not sensible

I have tried a few times over the years to understand amps, but beyond a superficial grasp, it eludes me. 1) In a river...
10 comments posted 19yrs
posted by sarah_sonderson
10 comments posted 19yrs posted by sarah_sonderson

That conductive stuff on circuit boards

I have a keyboard controller that I'm going to re-purpose (not a Mame controller). The membranes from the original keyb...
3 comments posted 19yrs
posted by die
3 comments posted 19yrs posted by die

Reducing PMDC motor noise ?

I have a CNC mill in the shop that radiates profusely in the AM band. The servo motors are brushed PMDC motors. I am wo...
8 comments posted 19yrs
posted by etpm
8 comments posted 19yrs posted by etpm

Work environment suitable for electronics work?

I am making the plunge and starting a business to design and manufacture electronic devices. I don't have a background...
15 comments posted 19yrs
posted by arhodes
15 comments posted 19yrs posted by arhodes

Filter Phase

Hello, I need to ask some basic questions which I am not able to find good answers for. When I look at filter programs...
3 comments posted 19yrs
posted by robd
3 comments posted 19yrs posted by robd

repair mobile phone

how can i repair my mobile phone selfly ?is there any help about that can you guide me regarding this
3 comments posted 19yrs
posted by kodi.sudar
3 comments posted 19yrs posted by kodi.sudar

How can I convert my old cell phone into this?

Basically, I want a device that will: 1- Wake me up in the morning, preferable 10 mins or so after sunrise (there are U...
2 comments posted 19yrs
posted by stacyr29
2 comments posted 19yrs posted by stacyr29

how to repair lifted trace pads ?

Is it necesary to repair lifted traces/pads ? its actually a pad at the end of a trace to mount a wire/pin connection t...
25 comments posted 19yrs
posted by some
25 comments posted 19yrs posted by some

Battery question

>Hi I have a battery that is 11.1 volt and the device I'm powering will >require 5v 2 amps. I'm going to use a regulato...
35 comments posted 19yrs
posted by louis.brinson
35 comments posted 19yrs posted by louis.brinson

How to test for Q of LC circuit unloaded

I have a ferrite rod antenna that measures a Q of around 200 unloaded using a Q meter. This was done by someone else an...
5 comments posted 19yrs
posted by wrongaddress
5 comments posted 19yrs posted by wrongaddress

screwdriver tester

when i stand on a wooden stool and touch a live wire i dont get a shock because circuit is not complete with ground as...
22 comments posted 19yrs
posted by pratikgetz
22 comments posted 19yrs posted by pratikgetz

canonical forms

Hi all, I was recently reading the book "Write Great code by ryndall Hyde" in this in chapter 8 the following are given...
4 comments posted 19yrs
posted by aarklon
4 comments posted 19yrs posted by aarklon