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Offline johnnyvd

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Gyro Turret lock function
« on: April 17, 2018, 05:03:51 PM »
I happened to come across this:


Ordered one from HobbyKing and it will probably work fine if you would use a servo for turret rotation.

But i was wondering if it would be possible to use the internal drive units on the TCB maybe general I/O in-out?
Seems the Gecko would be a good alternative, but as the TCB has the drives already integrated...
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Offline LukeZ

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Re: Gyro Turret lock function
« Reply #1 on: April 17, 2018, 06:04:28 PM »
The Geko is just a brushed speed controller, it's not clear he's even still selling it, but any brushed ESC (with forward and reverse) would work the same (this one from Banggood would be small and cheap). This would let you use your standard HengLong/Taigen turret drive instead of a servo.

The whole setup would be independent of the TCB. Just set your turret rotation to RC Output, attach the gyro unit to RC Output 3 on the TCB and then attach the output of the gyro to your ESC which then controls the turret motor. But yes, that does require you to buy an ESC.

There isn't really a good way to use the onboard drivers in this capacity. The way these inexpensive gyros work is by modifying a standard RC signal. Because the onboard ESCs are precisely that (onboard), there is no RC signal to tap into midway between the processor and the motor driver chips. Nor are we presently able to read a standard RC signal, which is what these gyros put out. Right now the I/O pins only read analog or digital inputs but not PWM.

Theoretically, it may be possible to program the I/O pins to read PWM (although I'm not sure off the top of my head if we have the processor resources to do this). If so, theoretically, it may be possible to send an RC signal out the TCB, into the gyro, then from the gyro back into the TCB through one of the I/O ports, then use that to control the onboard motor driver. This is all theoretical but I think I it is rather complicated and I am not likely to pursue it...
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Offline johnnyvd

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Re: Gyro Turret lock function
« Reply #2 on: April 24, 2018, 08:36:59 AM »
Okay, that's clear. It also just occured to me that the Geko is just an brushed ESC.. i have some stuff lying around and do some tests.
The whole question was to save on the servo connections...
* E-75 / E-100 PAK44 "monster" - in progress
* Sturmjagdtiger PAK44 - in progress
* pz.kpfw KV-2 754(r) - in progress
* T-34 88mm "Kurland Tiger" - in progress

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Offline Brian Tulk

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Re: Gyro Turret lock function
« Reply #3 on: January 09, 2019, 04:16:39 AM »
hello,johnnyvd and luke, brian from south oz here, did you fit the turret lock set up? i have got in the bits and would  like to give it a try, a wiring diagram would be a great help if you could post one, all is going very well with my tcb set up,very pleased, very reliable, cheers thanks in advance, regards brian