Recent content by Paul Nicholson

The puzzle I have been trying to solve in this thread can be seen in what I have so far: I had already constructed that frame last week so I had a ceiling to work with. Then I bought that garage door opener because it was right in front of me and I was losing motivation. This has re-inspired...

You can't assume that I don't like building robots because the effort of it landed me in hospital. I'm grateful for your suggestions. You are right about everything you say, but I don't think you're aware of the waiting time for shipments from China. I'm saying that links and step by step...

I just had a great idea for a slip ring that's extremely cheap, you can find them in most homes, they can handle huge current and they also act as a one handed click-connector. By the way, this is the kind of lateral thinking I'm usually looking for: Edit: I looked into these. They only...

I need 50A because of the current used by all the servos in the robot. I was originally using these Power HD 1235MG servos for the shoulders: These 7.4V analog servos have a holding torque of 40 kg.cm, move at human speed and cost US$60 each. But they sound like a chainsaw, incompatible with...

They don't sound like they would meet my requirements of 50A minimum. Hobby servos that use Pulse Width Modulation generally come with three wires: Red, Black and White. For a start, I'm pretty sure that 100% of the power supply's voltage is always going into the motor via the red live cable...

Thank you, Mech_Engineer - great image. I know this is not an electronics forum category, but now that I know about these hollow motors, and I have never seen hollow servos, does anyone know how I could safely wire the guts of a 6v hobby servo into one of these things so I can control it with a...

I'm not sure if this forum is busy or not, so for my own records I'll post this note about what I discovered today: Ceiling fans with lights in the middle have achieved what I want already. After that I found this garage door opener, which does not have continuous rotation nor a potentiometer...

I found this closed thread and I'd like to continue it: https://www.physicsforums.com/threads/design-question-wiring-motors.459672/ I am building a rotating ceiling mount (or rotating a floor plate) and am trying to solve the problem of the continuous rotation servo motor getting in the way of...

Hi, My name is Paul. I'm from Sydney Australia. I'm building robots, and am interested in understanding and manipulating reality for both fun and to make the universe a better place.