Hobby Electronics Basics

  1. Home
  2. Hobby Electronics Basics
9387 Threads Posts
to

Worth reading in Hobby Electronics Basics

how to flip a relay by digital signal

Hi, What would be an easy way to turn on a relay by a digital signal. The relay would be hooked to a 220 V AC device.
2 comments posted 18yrs
posted by saurabh9
2 comments posted 18yrs posted by saurabh9

mosfet audio quality

How does this IRF530-based circuit compare with, say, an LM3886? http://www.irf.com/technical-info/appnotes/an-948.pdf...
3 comments posted 18yrs
posted by mrdarrett
3 comments posted 18yrs posted by mrdarrett

Add a two way switch to this circuit

Hi, Please have a look at the circuit at: http://www.glacialwanderer.com/_blog/blog2008/04_April/hb_relay5.jpg. It is f...
8 comments posted 18yrs
posted by saurabh9
8 comments posted 18yrs posted by saurabh9

being shocked by Amp casing

hi all, perhaps slightly off-topic but you guys have been of great help to me in the past When I was installing a new h...
13 comments posted 18yrs
posted by robert.zeilinga
13 comments posted 18yrs posted by robert.zeilinga

Question: capacitors as special use batteries?

I recall from my hobbyist days that high-voltage capacitors can keep a charge for a significant amount of time, especia...
14 comments posted 18yrs
posted by msadkins04
14 comments posted 18yrs posted by msadkins04

Help needed designing square wave osc (555)

Hi, I've been trying to calculate "standard" values that would make me a 555 R1/R2/C1 square wave oscillator with a 50%...
14 comments posted 18yrs
posted by kasterborus
14 comments posted 18yrs posted by kasterborus

Help needed finding oscillator values

I would like to build 2 square wave oscillators from a 555 timer using the classic R1/R2/C1 configuration. I would like...
1 comments posted 18yrs
posted by kasterborus
1 comments posted 18yrs posted by kasterborus

Transistor Current Question

Hello I was hoping someone could explain how to do this calculation for me. I've got 3 transistors and 5 RGB LEDs, and...
5 comments posted 18yrs
posted by Elscimar
5 comments posted 18yrs posted by Elscimar

1N2071 diode speed

I found four 1N2071 diodes in my junk pile. Apparently the 1N2071 is an obsolete diode - Mouser doesn't carry it anymor...
7 comments posted 18yrs
posted by mrdarrett
7 comments posted 18yrs posted by mrdarrett

Question about static electricity

I bought a USB drive, and it came in a small plastic shell package. Is it safe to assume that this plastic material is...
6 comments posted 18yrs
posted by void.no.spam.com
6 comments posted 18yrs posted by void.no.spam.com

basic application inquari

My application is a programmable board+ high noise sound sensor+ speaker. First i need to know how can i purches compati...
6 comments posted 18yrs
posted by alaam01
6 comments posted 18yrs posted by alaam01

Minimising current in unused op amp

Hi All, Having found dual op amp packages around a fifth the price of comparable single packages from online distributo...
5 comments posted 18yrs
posted by angus.oliver
5 comments posted 18yrs posted by angus.oliver

information about bridge rectifier

hi thanks for ur kind informaation which u have given,but i want to know a small detail about bridge rectifier. DOES TH...
4 comments posted 18yrs
posted by sg858585
4 comments posted 18yrs posted by sg858585

Archive Video Format standard

Preserving our visual History and Data needs a robust format that will be around for years into the future. After looki...
2 comments posted 18yrs
posted by 2359510
2 comments posted 18yrs posted by 2359510