Hobby Electronics Basics

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Parking Sensors

Hi, I'm looking at parking sensors and can't work out why there aren't lists of sites on Google telling you how to make...
4 comments posted 18yrs
posted by mQiQcQhQaQeQlQ
4 comments posted 18yrs posted by mQiQcQhQaQeQlQ

ESR homebrew revisit ? good design ?

Thanks to all for the ESR meter advice. I had settled on building this *free* ESR meter schemat ... http://www.qsl.net/...
18 comments posted 18yrs
posted by some
18 comments posted 18yrs posted by some

LTspice question

I was looking for some way to have a fuse in LTSpice but as of yet I can't find one. I did find a current controlled sw...
0 comments posted 18yrs
posted by 1qazse4
0 comments posted 18yrs posted by 1qazse4

Looking for photodiode BS100C

Hi, Does anyone know of a possible source for the (now discontinued) photodiode BS100C - made by Sharp. I need some vis...
2 comments posted 18yrs
posted by kasterborus
2 comments posted 18yrs posted by kasterborus

the Hula Hoop

I was at the gym the other day, there was a girl doing that shimmy thing, with a hula hoop. I haven't seen one of those...
8 comments posted 18yrs
posted by r_delaney2001
8 comments posted 18yrs posted by r_delaney2001

Power adaptor question

I have a device which uses 9V 500mA. I am wondering if I can use a regulated switchmode 9V 2A power adaptor without dama...
5 comments posted 18yrs
posted by sanufi
5 comments posted 18yrs posted by sanufi

FM Crystal Radio

I'm about to build an FM crystal radio, but the schematic calls for a 50 pF variable capacitor, would a 2 section 233/8...
23 comments posted 18yrs
posted by the1930s
23 comments posted 18yrs posted by the1930s

advise on ESR meter project ?

after diagnosing an old microcontroler board with lots of various old caps i thought maybe an ESR meter to be a good to...
24 comments posted 18yrs
posted by some
24 comments posted 18yrs posted by some

Hey Chris W KE5GIX

Did you see my post with the constant current circuit? I'm also a ham, call sign KF2HI I got my extra back when you had...
1 comments posted 18yrs
posted by nospam
1 comments posted 18yrs posted by nospam

Multi Battery Charger for Lead Acid

I have a 0 - 15V, 30 amp power supply that I want to use to charge several small SLA batteries at the same time. The pr...
2 comments posted 18yrs
posted by 1qazse4
2 comments posted 18yrs posted by 1qazse4

Substituting alkaline for ni-mh in Digital Camera

My camera normally takes a 6v .6ah ni-mh battery. I've been able to rig-up and power the camera from a 5v 1.5a wall war...
5 comments posted 18yrs
posted by twirling.head
5 comments posted 18yrs posted by twirling.head

24 Volt AC speed controller or dimmer switch

Hello I used to be able to purchase a 24 volt AC rotary speed controller for some small fan coils I supply. These fan c...
2 comments posted 18yrs
posted by chaters
2 comments posted 18yrs posted by chaters