lambdapriest
RCTalk Racer
It's probably not the best idea; but I can't stop thinking about it.
I want to build up a weapons-grade Mini-Z, running on a brushed motor, to run in the 2wd Mod class (against the lipo chassis cars).
Why?
Here are my constraints:
I'd like to run it on "2s" - i.e., four of these PN Extreme Power Li-Ion 3.7v AAA-sized batteries. I know I'd have to re-wire the battery holder to make it 2s2p - that's not a big deal. It'd be easier if I did a PN build out of it, but I'm sure I could get it to work on the MR03 chassis. That definitely takes "just use the MR03 board" out of the realm of possibility - I would definitely melt it.
Furitek makes a board called the Velos that supports the 5-wire servo and is a drop-in replacement for the MR03 board... but it's brushless. I'll probably go this route if I have to give up and run brushless, but I don't want to!
So what I need, I think, is:
EDIT:
HOLD UP, the game may be afoot:
https://www.rcgroups.com/forums/showpost.php?p=37009285&postcount=8
From reading this thread - it sounds like I can use the board from a 3-wire servo to control a 5-wire servo? Does that sound right?
I have a 1/10-scale AGFRC servo that I may be able to sacrifice; due to an unfortunate LocTite-related incident, the horn is permanently affixed to the splines.
I'm currently setting up my workshop in the garage; once I get that done, I might rip the thing open to see what I'm working with. Would be pretty simple (albeit time-consuming) to desolder the board, desolder the Mini-Z board, pin it all back together, and see what happens. Can anyone confirm - has anyone tried this before, running a 5-wire servo on a 3-wire receiver?
I want to build up a weapons-grade Mini-Z, running on a brushed motor, to run in the 2wd Mod class (against the lipo chassis cars).
Why?
- I think I could do it pretty cheap (famous last words, I know)
- It would be great fun to watch my little MR03-based car pull on the lipo boys down the back straight, even if I wasn't as fast on the rest of the track (when my club sets up for Mini-Z, we have a 30-plus-tile-long back straight and yes, it's incredible)
- I love the sound and feel of driving a brushed motor
Here are my constraints:
- I really don't want to build a chassis car; I already have an MR03, and I'd be open to converting it to a PN 2.5w, but I want to keep the "plastic chassis that's not a true pan car" thing going
- Which means that I need to run a servo controller that supports a 5-wire servo, so I can use the servo motor / gears / potentiometer that are already in the chassis
- I want to run a brushed motor
I'd like to run it on "2s" - i.e., four of these PN Extreme Power Li-Ion 3.7v AAA-sized batteries. I know I'd have to re-wire the battery holder to make it 2s2p - that's not a big deal. It'd be easier if I did a PN build out of it, but I'm sure I could get it to work on the MR03 chassis. That definitely takes "just use the MR03 board" out of the realm of possibility - I would definitely melt it.
Furitek makes a board called the Velos that supports the 5-wire servo and is a drop-in replacement for the MR03 board... but it's brushless. I'll probably go this route if I have to give up and run brushless, but I don't want to!
So what I need, I think, is:
- A brushed ESC (easy)
- A receiver (also easy, I already have a Flysky micro receiver sitting in a box in my office; I'll get around to installing it in the SCX24 eventually)
- A servo controller that supports a 5-wire servo (haven't found one yet), OR advice on how to mount up a normal 1/28 servo on an MR03
EDIT:
HOLD UP, the game may be afoot:
https://www.rcgroups.com/forums/showpost.php?p=37009285&postcount=8
From reading this thread - it sounds like I can use the board from a 3-wire servo to control a 5-wire servo? Does that sound right?
I have a 1/10-scale AGFRC servo that I may be able to sacrifice; due to an unfortunate LocTite-related incident, the horn is permanently affixed to the splines.
I'm currently setting up my workshop in the garage; once I get that done, I might rip the thing open to see what I'm working with. Would be pretty simple (albeit time-consuming) to desolder the board, desolder the Mini-Z board, pin it all back together, and see what happens. Can anyone confirm - has anyone tried this before, running a 5-wire servo on a 3-wire receiver?
Last edited: