Hobby Electronics Basics

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Identifying Infared LEDs

I have a Infrared LED transmitter and receiver that is part of a redemption game and I need to get some new ones. The d...
7 comments posted 16yrs
posted by uriahsky
7 comments posted 16yrs posted by uriahsky

WTF happened to this ng?

I go on a 16-month hiatus from electronics. I come back and the Sound/ Spam ratio is unbearable. Damn, what a shame. I l...
18 comments posted 16yrs
posted by blahbleh666
18 comments posted 16yrs posted by blahbleh666

A question about coil winding

Preparing to wind a motor coil or more. Need some info to consider a shortcut. Putting aside the issue of current handl...
165 comments posted 16yrs
posted by baughfam
165 comments posted 16yrs posted by baughfam

SPDT debounce doesn't

+5v +-----------------------------+---- | ____|________ +--o_ | | -_ 11| 74hc595 | -o--+-------------[| | | |__________...
42 comments posted 16yrs
posted by jasen
42 comments posted 16yrs posted by jasen

Christmas tree light question

Yes, it's that time of the year when men swear at tree lights, just as I am doing now %&&*%*^$&^$%&^$%*&(^(*&%!!! We ha...
4 comments posted 16yrs
posted by me
4 comments posted 16yrs posted by me

LED direct replacement for flashlight bulbs?

Kinda outta date here. Most of our stuff is old, but it works; or if it doesn't we fix it asap. So is it possible now t...
10 comments posted 16yrs
posted by tsanford
10 comments posted 16yrs posted by tsanford

photons and reflection

According to the wave theory of light, angle of incidence equals angle of reflection. No problem, in theory or fact. Ho...
100 comments posted 16yrs
posted by r_delaney2001
100 comments posted 16yrs posted by r_delaney2001

anti spam technique?

If you click on several of those spam clothes ads, they all have a similar 'looknfeel' with a live help window floating...
7 comments posted 16yrs
posted by bobgardner
7 comments posted 16yrs posted by bobgardner

TV remote IR receiver module

Are TV IR remote control receiver modules frequency selective? I know that remote control systems use PWM and the pulse...
7 comments posted 16yrs
posted by pawihte
7 comments posted 16yrs posted by pawihte

Switching topologies for power electronics

What is the difference between a full or half bridge constructed out of MOSFETs, and one constructed out of IGBTs? What...
4 comments posted 16yrs
posted by skinnyluigi
4 comments posted 16yrs posted by skinnyluigi

Counter/ Timer Circuit

I=92m a baseball coach at a high school and when we use our pitching machine our players want to hit more balls than th...
5 comments posted 16yrs
posted by piscatory
5 comments posted 16yrs posted by piscatory

A mechanical volume control that actually works!

Like most everyone else, I have had many devices that included a mechanical rotary volume control. And as far as I can...
1 comments posted 16yrs
posted by jdoe
1 comments posted 16yrs posted by jdoe