When HN users recommended it
1 HN user recommended this in 2024, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2024, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
A robot arm is fun, I assembled a 6 DoF one with metal parts and hobby servos that cost around £70 if I recall correctly.
I find it kind of interesting how because hobby servos are used, which don't have encoders on, when you turn it on and set the servo positions it jerks into life.
The problem I find with mine, is that all servos are the same, I think ideally the bottom servo needs more power. I need to try slightly higher voltage though too - I think I can use up to ~6V.
I controlled mine with a Python + a PCA9685 I2C PWM driver module - https://www.amazon.co.uk/gp/product/B014KTSMLA/