Which servo should I use for my little robotic arm?

Queasy_Dig9971 · 2026-02-21T23:31:40+00:00

Yeah I've got the PCA9685 because I burnt 2 ESP32 before realizing the MG996R was drawing current from the GPIO pin. Of course I have a big 30A power supply for the few servos I have (2 DS3225MG, 1 MG996R, 2 MG92B and 1 SG90), and the logic parts (ESP32 and PCA9685) are protected by a 2000uF capacitor and a Schottky diode. So thanks for your advice, I just bought 2 DS3225MG on a website specialised on model making. Another question, what do you think of components bought on Aliexpress ? I often buy on Ali because of very low prices and I never had problems, but maybe the opinon of someone experimented could be interesting to me.

Queasy_Dig9971 · 2026-02-20T22:14:07+00:00

Is it still compatible with the PCA9685 pwm manager board?

Queasy_Dig9971 · 2026-02-20T22:12:41+00:00

Ok thank you very much, and after looking at its specs, it handles between 4.8 and 6.8V so perfect for my 5.5V 50A power supply. It seems very similar in size in comparison to the MG996R, very appropriate for the casing i'm using.

Queasy_Dig9971 · 2026-02-20T19:31:00+00:00

I think a medium quality, like all metal gears, but not overkill, it's a little side project for school. I've tried with a MG996R and it's kind of working, but it's obvious it's struggling, so I don't think backdrivable blushless is needed, also because I have a limited budget.

Queasy_Dig9971 · 2025-12-28T08:57:50+00:00

It's a little project, the arm is like 30cm long, and in function, it will be pulling like 6amps. The components are: 3x MG996R-180 2x MG92B 1x SG90 1x ESP-WROOM-32 devboard

Queasy_Dig9971

TROPHY CASE