Hobby Electronics Basics

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Analog filter analysis

Hi all, I'm a newbie when it comes to filters. I've recived a schematic at work which has an LC Pi filter as part of a...
7 comments posted 20yrs
posted by ran.levi
7 comments posted 20yrs posted by ran.levi

Relay Alternative

Hi. I'm building an project to control house devices through PC using Interface Card from Vellman K8000 I will order SW...
3 comments posted 20yrs
posted by Dominator.Legend
3 comments posted 20yrs posted by Dominator.Legend

Turning Infrared into Radio Control?

Hi, I have a simple toy robot that is controlled by an infra red remote that I would like to transform into radio contr...
36 comments posted 20yrs
posted by nospam
36 comments posted 20yrs posted by nospam

Power supply

Hi all, I have been reading on power supply because my transformer died. I have been reading up on making my own power...
5 comments posted 20yrs
posted by lera
5 comments posted 20yrs posted by lera

Good Digital Multi-Meter in $50 Range

I just dropped my 20 year old Radio Shack digital multimeter and it stopped working. I use it probably once a month so...
33 comments posted 20yrs
posted by kenhall2REMOVE
33 comments posted 20yrs posted by kenhall2REMOVE

Light Activation

What device (component) would I need to use if I wanted say blue lights to come on when a 400 - 500 cycle tone was play...
5 comments posted 20yrs
posted by verizonplano
5 comments posted 20yrs posted by verizonplano

Controlling a motor in presence of phase shift

I am trying to control speed of a single phase fan motor using triac phase control, across a optoisolated boundary. The...
14 comments posted 20yrs
posted by no
14 comments posted 20yrs posted by no

Understanding circuits

Hi Everyone, I'm relatively new to studying electronics. I've purchased a few books (some college textbooks, a couple o...
7 comments posted 20yrs
posted by dratim
7 comments posted 20yrs posted by dratim

capacitors in series

HI, I have two capacitors in series. I want to put 35 volt acrosse ( cause I dont have 50v rated) so I want to use 25 v...
13 comments posted 20yrs
posted by lera
13 comments posted 20yrs posted by lera

lightning

When lightning strikes the ground, is the ground always more positive? Why doesn't lightning ever go upwards? Why is it...
3 comments posted 20yrs
posted by bob
3 comments posted 20yrs posted by bob

Reducing 12vdc to 6vdc on a I C board

I'm not the brightest bulb around when it comes to building electronic circuits... I have ordered a 4 station remote 12...
6 comments posted 20yrs
posted by cfpikelll
6 comments posted 20yrs posted by cfpikelll

battery charging

Hi again I feel like I am spamming this newsgroup. As for the gun, i'll wait a few days defore i do some more reading o...
14 comments posted 20yrs
posted by lera
14 comments posted 20yrs posted by lera

What stuff to buy from Jameco?

Hello! I'm putting together an order for Jameco, and I'd like some input on what ICs or other parts would be good to ju...
19 comments posted 20yrs
posted by blahbleh666
19 comments posted 20yrs posted by blahbleh666

coil discharge

Hi again, I am trying to discharge a 300v capacitor to a coil. I wanted to do the following: Capacitor | | | | | Coil |...
10 comments posted 20yrs
posted by lera
10 comments posted 20yrs posted by lera