Tagged Questions

0
votes
2answers
93 views

Should I use a parallel or serial connection?

I need to split one power cord from the wall socket to power three 20w lamps. Should I use a parallel, or a serial connection? Follow up question: In which ever case, where can I find some ...
1
vote
3answers
668 views

Using Parallel port to Power circuits

How to use PC parallel port as a power supply for any device (similar to charging Mobile Phones). Actually I have to powrer my circuit based on parallel port. Which pin of parallel port can supply at ...
4
votes
2answers
712 views

Parallel Port - Voltage / Current required for input pin

I am developing a program to send and receive sigal to my circuit and pc. Actually I have to count the pulses or (frequency of high pulse) generated from a 555 timer IC in my circuit. When I connect a ...
2
votes
4answers
2k views

Your thoughts on connecting multiple leds in parallel and series

I would like to connect 32 3W LEDs together. All the LEDs are the same. Each LED (32 of them): 750mA 2.2V 3W Power Source: Constant Current 3A 100W I thought ...
1
vote
2answers
1k views

how to connect relay and physical switch to control light

I am new in this kind of stuff so please excuse me for my lack of knowledge :) I have successfully connected blackwidow(wifi + arduino) with relay to control a 220V light bulb. Now i want to embed ...