Search found 5 matches

by jackbbot51
Mon Dec 07, 2009 10:39 pm
Forum: General Discussion
Topic: remote control.............
Replies: 5
Views: 1480

remote control.............

hey everybody, does anybody know whether it is possible to sent a sequence of bits ........basically a code/digital signal/waveform with classic AM or FM transmitter........specifically there are lots of simple circuits on the web for like FM transmitters that run off a couple of transistors and a m...
by jackbbot51
Wed Sep 09, 2009 8:45 am
Forum: General Discussion
Topic: basic power supply
Replies: 3
Views: 939

basic power supply

I'll post the exact specs and numbers latter.........but just to start the topic in general......... I'm building an scrolling LED board that uses primitive 4017 counters some 555 timers that'll flash through the text [pattern of LEDs arranged to form the text) but obviously 2 options........ 1) run...
by jackbbot51
Wed Aug 12, 2009 6:43 pm
Forum: General Discussion
Topic: PCB - some reputable companies
Replies: 3
Views: 1467

PCB - some reputable companies

Hi I would really appreciate if some one could list a couple of companies that could produce PCB s for say personal projects. So what I would like is some reputable companies say like in the US and possibly out of the US say like china. And what would be the difference between in or outside the US? ...
by jackbbot51
Sat Jan 24, 2009 7:15 pm
Forum: General Discussion
Topic: max232 chip
Replies: 1
Views: 723

max232 chip

How does the MAX232 generate different voltages with only a single supply?
by jackbbot51
Sat Jan 24, 2009 7:10 pm
Forum: General Discussion
Topic: pcb ground plane && capacitors for chips
Replies: 5
Views: 1238

pcb ground plane && capacitors for chips

on a pcb with a crystal (used for some most likely for timer for the microcontroller) on it how come it could be surrounded by ground plane on the pcb board?? does anybody know?? what would be the purpose?? also the i.c. s have 0.1 uF capacitors very close to all of them.......?? is this for decoupl...