Hi everyone! First of all i hope i posted in the correct section and second i need some tips on a project at school. So i make a mobile robot who follow a black line and use a robotic arm with 3 servos to pick...uhh...something. Everything is good until now, but i have problems with powering the entire "thing". First of all i have two motors(6V:120mA each),three micros servos(sg90-5V),one sensor array QTR-8A for following the black line(5V),one IR module sensor(5V) and the arduino board.
The thing is i want to power the "thing" efficient and i don't know how,i used so many 9v baterries...I was thinking about using a lipo .
A 2 cel LiPo will provide 7.4V Nominal so should be enough. Or a 2 Cell LiFe which will provide 6.6V Nominal. The motors will run on the LiFe without any regulator. Use a voltage regulator to get the 5V for the servos and sensors
Both types of batteries will need a specialist charger so add that into your costings
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mark
You state the motors are only 120mA, which sounds like a no-load current. What is the stall current? That is what everything should be based upon.
The servos and uC require 5V, and the motors will be fine with 5V as well. What you need is to find the total current and find a regulator suited for that number.
How much play time are you looking for before the batteries are flat?
@tinman13kup This are the informations about the motors:
Model: HC02-48
Specifications: biaxial
Reduction ratio: 1:48
3V load (r / min): 125
3V 66mm wheel-load speed of installation (m / min): 26
5V load (r / min): 208
Speed: Very Fast
5V load install 66mm wheel speed (m / min): 44
Torque: 0.8KG.CM
Wheel diameter: 65MM * 27MM
Straight-axis motor slowdown
Model: 1B48-1416LSD6 (integrated) 1:48
Description: magnetic, with anti-jamming, high speed, high torque
DC: 3-6V
RPM: 3V:125rpm, 5V:200rpm, 6V:230rpm;
Current: 3V:60mA, 5V:100mA, 6V:120mA.
How much play time are you looking for before the batteries are flat?
Between 30 minutes and 1 hour.
@MarkDerbyshire I was thinking to use two lipo batteries. One is LiPo Turnigy 1000 mAh 3S 20C (11.1 V) with a 12V voltage regulator for motor shield with l293d driver. The second LiPo Zippy Compact 1000 mAh 2S 25C (7.4 V) with a 5V voltage regulator for arduino,servos,qtr 8a and ir sensor.
Or second tought to use for sensors,shield and servos LiPo Turnigy 1000 mAh 3S 20C (11.1 V) and for arduino uno board a 9V battery??!!
THANK YOU!
Why not go simple? use a cheap USB power-bank, i used one for a small RC car thing i built and it lasted around 30 min per charge.
swe-dude:
Why not go simple? use a cheap USB power-bank, i used one for a small RC car thing i built and it lasted around 30 min per charge.
I tought about that to, i need to buy only one 12v voltage regulator for the motor shield and with 5V i power the remaining components. What do you recommend?