dkennyken
United Kingdom
Asked
— Edited
Hi all, I'm new to this forum and new to building robots.
Got some inspiration from DJ Sures 1980's Omnibot build.
I've got myself a EZ-B v3 control board and an old omnibot but was wondering if there is a way to purchase the rest of the kit or at least the wifi camera for v3?
If not any advice on the best servos to use would be appreciated. I have been looking at AS-17 servos and HXT 900s.
Thanks for taking the time to read my post and hope to hear from anyone soon
Ken.
You are using a lot of the same stuff I threw in to Melvin... so from experience;
The TB6612FNG is fine to use however you need to use an external supply (i.e. don't take the Vm from the EZ-B take it from the battery) for the motors. I have also had some issues with Melvin spinning on powering up, I believe my V3 sets some pins high when initially powered up on occasion, I still need to check it properly though before I can say anything for sure. The TB6612FNG as wired like this works fine on the V3.
The MG-995s I found were browning out my EZ-B when the 2 in the pan/tilt of Melvin's head were being used. I found I needed to add in a regulator and provide them with power (Vcc & Ground) which didn't pass through the EZ-B. I have since made it a standard of mine to provide all servos Vcc and Ground from regulated supplies rather than from the EZ-B (basically only bringing the Signal from the EZ-B, the power comes from the battery via a regulator).
Good luck trying not to do too much at once. Melvin was supposed to be me testing the water... I fell in the deep end very quickly and have been juggling projects ever since.
Great, that wiring info for the motor controller is a life saver
so the servos should work fine straight from the 6v 4.5 amp battery with a regulator for each one? What do you think of the LM2596 regulator board? Will that do what I want?
Or am I best making my own regulator board rather than purchasing one already assembled?
If it's a 6v battery you wont need a regulator, just power the servos direct from the battery. The MG995s can take 6v without a problem (some reports say 7.4v but I'm not about to check it out just yet).
:) Once again thanks, it would have taken me forever to try and work out the wiring for the motor controller.
It's straight forward enough, there is another forum post about it which might show it a bit clearer. I have it sketched out myself somewhere from when I did Melvin's, if I can find it I'll scan it in as I made it very clear and easy to follow (I needed to, it was the first thing I wired to my EZ-B after 10-15 years without soldering or anything)
That would be brill
Here's my scribbles on the controller. Should be pretty self explanatory.
Run out of time tonight (it's now midnight so I need my bed!) but I also found my original sketch version of Melvin's schematic. I'll scan that in tomorrow and pop it up for you.