Hi I am currently trying to use the Pollulu Maestro Mini Servo controller to control 5x servos but I cant find the right power supply for the servos. I got a 6v dc wall adapter and a 5v dc wall adapter but both are too powerful I think. Could i us this?
https://www.robotshop.com/uk/6v-1600mah-rechargeable-nimh-battery.html?gclid=Cj0KCQiA3rKQBhCNARIsACUEW_bL8_MsDdTkFQNsVyUR5NnBu2gNdXATJ1g9pL7rickjoh7YABogQ08aAo2kEALw_wcB
Hello @serenseren and welcome to the RobotShop community,
May I ask why you think the wall adapters you have are too powerful?
The operating voltage for the mini maestro is 5-16V and regular hobby servos should work with 6V.
However, if you prefer using a battery (to make it portable for example) the one you linked should work as long as the discharge rate is enough for your servos, if you are not familiar with this concept check this tutorial:
It gets overheated. Would it be something to do with the mAh?
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The problem might be that your servos are drawing too much current. What servos do you have? Are they often stalled? Could you give the specs for the power supplies you have?
Thank you for your help Geraldine
This is the Servo: TowerPro Servo Motor - SG92R Micro– The Pi Hut
This is the power supply https://www.argos.co.uk/product/9829701?clickSR=slp:term:power%20dc:4:1048:2
Ok, as the servo listing doesn’t specify the current draw I’m going to use the specs from this listing
The servo runs on 5V nominal with a current draw about 10mA at idle and 100mA to 300mA when being commanded to move depending on how it is being operated. Current draw can get up to a maximum of 650mA under a stall condition.
You have 5 servos, so the current should be 500mA to 1500mA when being commanded to move, and 3250 if they all stall at the same time.
The power supply you have has these specs:
3V, 4.5V, 5V = 1200 mA (max load of device to be powered)
This means that when all servos sare commanded to move the power supply can’t provide enough current.
It would be best if you use a power source that can provide around 2A, or just to be safe 3.5A.
thank you so something like this : https://cpc.farnell.com/pro-elec/pell0024/5v-3a-uk-plug-2-1mm/dp/PW04599?mckv=sk7R6I7Gm_dc|pcrid|426684131180|kword||match||plid||slid||product|PW04599|pgrid|100371159518|ptaid|pla-875792617340|&CMP=KNC-GUK-CPC-SHOPPING&s_kwcid=AL!5616!3!426684131180!!!network}!875792617340!&gclid=Cj0KCQiApL2QBhC8ARIsAGMm-KEmD8vUCRfuXJxTksV3J9T7BfmOPAH6jBRb9WiLSmBX25rvDMPXaQcaAs62EALw_wcB
Hi, have you tried this 5V,2A DC adapter?