EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: cipicips on May 26, 2021, 08:42:57 pm
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Hello everyone,
i have came across three servo motors (HDKJ D3015) specifications about them are listed below, and that is all I can find about them.
My issue is powering them, all I have is 12V 5A power supply, what do you suggest I use to lower the voltage, linear regulator (LM7805, LM338, some DC-DC convereters.....)
Operating Voltage:4.8-7.2V
Dead zone set:4us
Operation Torque: (6V) 14Kg.cm
Operation Torque: (7.2V) 15Kg.cm
Operating Speed: (6V) 0.18sec/60°
Operating Speed: (7.2V) 0.16sec/60°
The rotation angle is 300 degrees
NO-Load CURRENT:<500MA
Regards
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You should have a few DC-DC buck modules in your parts kit for stuff like this.
Do you not have an adjustable power supply at all?
Can't seem to find what the max stall current of these is, but that would be good to know.
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Hello,
thank you for your reply. I have done some measurment using Laboratory power supply and waveform generator. Since it is digital type of servo I've used 200Hz PWM frequency. Voltage applied was 6V and 5V.
For my application there will be no load (it will only turn from one 0-300°) 5V will suit.
Current in stady state was 0.1A. I was driving servo back and forth from 0-300° and current was varying from 0.33A-0.8A.
Just to be sure i think it would be good to chose 1A per servo, in my case 5V 3A power supply.
Since I have Meanwell LRS-150-12 (12V 5A) powering the board , i would like to use DC-DC so I can get 5V and 3A.
Is it ok to power PIC microcontroler and servo from dc-dc buck converter ?
Also, is there any recomendation what 5V buck should I use, or just buy something like Pololu step down converter D36V28F5 and solder it on board ?
Regards
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Is it ok to power PIC microcontroler and servo from dc-dc buck converter ?
Yes that is ok, assuming PIC is 5V version.
Also, is there any recomendation what 5V buck should I use, or just buy something like Pololu step down converter D36V28F5 and solder it on board ?
That is what I would do. I use generic cheap converters:
https://www.aliexpress.com/item/1005001629723875.html (https://www.aliexpress.com/item/1005001629723875.html)
https://www.aliexpress.com/item/32934802533.html (https://www.aliexpress.com/item/32934802533.html)
But D36V28F5 looks good, and being polulu I'm sure it meets the spec.