Prop power consumption
T Chap
Posts: 4,223
Can someone help me sort this out:
Current Draw @ 3.3 vdc, 70 °F 500 μA per MIPS (MIPS = Freq in MHz / 4 * Number of Active Cogs)
7 cogs 80mhz
500 uA = .0005 A
80 000 000 / (2 * 7) = 5_714_285
5_714_285 * .0005 = 2857
What is this number 2857? Doesn't seem right that there is 2857 amps used on the Prop!
I put a meter on a project yesterday (AC hot in series). The project is a toroidal 120ac to 24ac, 5 volt switching reg IC @ 1.8amps rating, 15v regulator IC , 20 IC's total, 6 mosfets. I plugged in the leads to the 10amp input, and got .07 amps idle and .1 with motor running. I want to try to get an approximate amp number for the system on paper, since .07A seems low for all the parts that are running.
Current Draw @ 3.3 vdc, 70 °F 500 μA per MIPS (MIPS = Freq in MHz / 4 * Number of Active Cogs)
7 cogs 80mhz
500 uA = .0005 A
80 000 000 / (2 * 7) = 5_714_285
5_714_285 * .0005 = 2857
What is this number 2857? Doesn't seem right that there is 2857 amps used on the Prop!
I put a meter on a project yesterday (AC hot in series). The project is a toroidal 120ac to 24ac, 5 volt switching reg IC @ 1.8amps rating, 15v regulator IC , 20 IC's total, 6 mosfets. I plugged in the leads to the 10amp input, and got .07 amps idle and .1 with motor running. I want to try to get an approximate amp number for the system on paper, since .07A seems low for all the parts that are running.
Comments
(80/4)*7 not 80 000 000/(2*7)
which computes to 70mA what you got.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
24 bit LCD Breakout Board coming soon. $21.99 has backlight driver and touch sensitive decoder.