Hobby Electronics Basics

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LM555 as a Astable Multivibrator help!!

Hello The basic circuit I am using is at this link: http://i9.photobucket.com/albums/a60/phil54/lm555circuit.jpg The re...
4 comments posted 20yrs
posted by pranthony
4 comments posted 20yrs posted by pranthony

need DS1678 source

The Dallas/Maxim DS1678 event logger has appearently been discontinued. Can someone please suggest a source for a small...
3 comments posted 20yrs
posted by jbasi
3 comments posted 20yrs posted by jbasi

Multi Coloured LED 120v help

On many occations I have used the following circuit to tell me when I have left light swiches on. 120v AC----R100k---.-...
20 comments posted 20yrs
posted by stevesemple
20 comments posted 20yrs posted by stevesemple

Capacitor notation

I have two capacitors lying here, with the following inscriptions: http://www.hucker.plus.com/temp/caps.jpg One is blue...
10 comments posted 20yrs
posted by no
10 comments posted 20yrs posted by no

battery

I'm thinking of using this battery: http://www.radioshack.com/product/index.jsp?productId=2104684&cp=&origkw=9+volt&kw=...
2 comments posted 20yrs
posted by bob
2 comments posted 20yrs posted by bob

coil gauge

HI again, I read on the internet that depnding on the gaude size lets 18, it will take more amp to generate the same EM...
6 comments posted 20yrs
posted by lera
6 comments posted 20yrs posted by lera

square waveform (555)

Hello everyone, Just liek to know if it is a normal thing that at LOW frequencies ( 15-25 Hz) that the output of a 555...
6 comments posted 20yrs
posted by lera
6 comments posted 20yrs posted by lera

telephone

Can someone look at: http://electronics.howstuffworks.com/telephone5.htm Do you think this will really work? Any advice...
15 comments posted 20yrs
posted by bob
15 comments posted 20yrs posted by bob

How to hook up a 12vdc single coil latching relay

I ordered these single coil latching relays and didn't get a schematic with them and.... I'm lost as to how to hook them...
4 comments posted 20yrs
posted by cfpikelll
4 comments posted 20yrs posted by cfpikelll

delay

What is the cheapest way to add a 250 ms delay to an analog signal that goes up to 80 MHz?
6 comments posted 20yrs
posted by bob
6 comments posted 20yrs posted by bob

Configuration of TV setup

Have TV Video and DVD player. Video and DVD are modern with usual multitude of connections. The TV is older has one sca...
2 comments posted 20yrs
posted by sandon2
2 comments posted 20yrs posted by sandon2

speaker freq response

I purchased an in-dash stereo for my pick-up truck, and some cheap speakers. The stereo has bass and treble adjustment...
22 comments posted 20yrs
posted by david-del
22 comments posted 20yrs posted by david-del

dumb questions from an outsider

hi there i have a couple questions about kirkhoff's laws. first, i'm curious about whether they're actually used in pra...
15 comments posted 20yrs
posted by sean_mcilroy
15 comments posted 20yrs posted by sean_mcilroy

C3088 CMOS Imaging Sensor Questions

Hi all, I'm looking to purchase the C3088 CMOS imaging sensor. I plan to interface it with a PIC microcontroller in ord...
0 comments posted 20yrs
posted by weg22
0 comments posted 20yrs posted by weg22