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Digital input to an IC - do I need a resistor?

Hi, I'm currently designing a device based around a PIC microcontroller. However, in getting to this point I have rathe...
6 comments posted 19yrs
posted by news
6 comments posted 19yrs posted by news

Audio to MP3...

For many years now my wife has recorded onto cassette tape, from her hifi unit using its programming facilities, the da...
6 comments posted 19yrs
posted by news
6 comments posted 19yrs posted by news

interfACING 8051 WITH adc

hi,i am working on a project where i have to interface a microcontroller with an adc & an rf transceiver the data input...
2 comments posted 19yrs
posted by gautham01986
2 comments posted 19yrs posted by gautham01986

Debouncing a thermostat switch...

I have a programmable thermostat with adjustment switches that apparently bounce quite a bit, causing lockup of the sys...
12 comments posted 19yrs
posted by db5151
12 comments posted 19yrs posted by db5151

debouncing a 4066 switch?

I'm using an analog 4066 switch in an application where the input is an audio signal being passed to a speaker, I'm goi...
8 comments posted 19yrs
posted by panfilero
8 comments posted 19yrs posted by panfilero

Electric door knob

Just want to know why some one has not invented an electric door knob?
15 comments posted 19yrs
posted by myspirit2000
15 comments posted 19yrs posted by myspirit2000

door knob

Is there any way you could hook you door knob to an electric current? And why havent they come out with something like t...
14 comments posted 19yrs
posted by myspirit2000
14 comments posted 19yrs posted by myspirit2000

Circuit simulation

I have to make a hardware ckt. for my project . But before making the hardware I want to test the ckt.that I have. Plea...
2 comments posted 19yrs
posted by gurpreet.singh
2 comments posted 19yrs posted by gurpreet.singh

electronic project

i am a third year student in the field of electronics and i am supposed to invent an innovative project to get my dimpl...
11 comments posted 19yrs
posted by mizzi27
11 comments posted 19yrs posted by mizzi27

any clues on this one ?

Hi all, I am hoping someone here may be able to help me with solving an intermittent fault with our family TV....... PL...
1 comments posted 19yrs
posted by t.k.j
1 comments posted 19yrs posted by t.k.j

90 deg audio-range phase shift network

I had this link, but forget to bookmark. Was a site that compared analogue technique, including component values and re...
2 comments posted 19yrs
posted by newsrudy
2 comments posted 19yrs posted by newsrudy

How can I silence a Samsonite travel alarm clock?

How can I silence a Samsonite travel alarm clock? My wife has a travel alarm clock bearing the Samsonite name. Sorry, b...
5 comments posted 19yrs
posted by cawatk
5 comments posted 19yrs posted by cawatk