Hi, I'm a total newb at electrical engineering stuff and could use some help understanding how to handle the current/voltage requirements for my (perhaps over-zealous) project.
I have an art project that will consist of the following, which i've done my best to assemble volts and currents for. It has been suggested to me that i'll need MOSFETs or a Darlington Pair to get the current i need. i have not addressed the PSU since i don't know what i'll need yet.
RGB LEDs:
3 channels (each with it's own color) of RGB LEDs, total of 11 lights x 20ma each = 220ma
3.2 volts per RGB LED
Regular LEDs:
7 red LEDs - a total of 16 x 20ma = 320ma
2v per LED
A controller (input) device – 5v – up to 500ma
Arduino – 7-12v up to 200 mA (but more like 50mA normally)
Arduino VoiceShield – 3v (Not sure of amps, but it's a shield for the above Arduino card) -
VoiceShield
Daughter Board for controlling LEDs (74HC595 -
Arduino - ShiftOut) = 5v Not sure of current.
Amp circuit – 6v -
Mini 2W amplifier circuit | www.circuitstoday.com (330-660 mA)
Sonar Distance Sensor – 5v from Arduino, not sure of current -
Arduino - Ping
I'm trying to figure out what my next step is in nailing down the power requirements and technology (MOSFETs/D.Pairs, etc?). If i'm omitting any important details, please let me know.