Smartibot

[Gopi Palaniappan]

I am so amazed by this bot. Its tiny single board bot that supports 4 channel bridge for dc motor control and 10 channel servo control at the same time.. I mean that is so amazing for a tiny package. It cost $50.. I wish it was cheaper..

Ref:

https://www.cambridge-dt.com/ai-robot-smartibot-kit/

https://www.kickstarter.com/projects/rossatkin/smartipresence-cardboard-telepresence-robot

Has anyone come across any controller that does this? Its packed with a lot of things in a tiny form factor.. I feel the pricing is not bad, considering there is nothing like this in the market.. what do you think?

too bad its not selling in US yet.. 

[Gopi Palaniappan]

In case you are interested to get one, you could use my referral link: http://craftyrobot.refr.cc/gopipalaniappan

[Chris Albertson]

Of course, for $50 you could buy a few breakout boards and get the same functionality for about the same price or maybe less but you'd have to do the work and this little board is all one board with no need to wire together i2c based driver boards to a uP board.

What surprises me is that there are not hundreds of open-source designs for things like this.   PCBs can now be made for less than $1 and components assembled for perhaps another $2.    Why is there not a website like Thingiverse with hundreds or even thousands of PCB design files that can be built to order then shipped for only the cost of building them?

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Chris Albertson
Redondo Beach, California

[Gmail]

Sounds like an opportunity. 

Thomas

-

Want to learn more about ROBOTS?

https://www.youtube.com/user/thomasfromriverside

On Jan 1, 2021, at 12:18 PM, Chris Albertson <alberts...@gmail.com> wrote:



Of course, for $50 you could buy a few breakout boards and get the same functionality for about the same price or maybe less but you'd have to do the work and this little board is all one board with no need to wire together i2c based driver boards to a uP board.

What surprises me is that there are not hundreds of open-source designs for things like this.   PCBs can now be made for less than $1 and components assembled for perhaps another $2.    Why is there not a website like Thingiverse with hundreds or even thousands of PCB design files that can be built to order then shipped for only the cost of building them?

On Fri, Jan 1, 2021 at 11:53 AM Gopi Palaniappan <gop...@gmail.com> wrote:

I am so amazed by this bot. Its tiny single board bot that supports 4 channel bridge for dc motor control and 10 channel servo control at the same time.. I mean that is so amazing for a tiny package. It cost $50.. I wish it was cheaper..

<2018-06-robot-animated.gif>

Ref:

https://www.cambridge-dt.com/ai-robot-smartibot-kit/

https://www.kickstarter.com/projects/rossatkin/smartipresence-cardboard-telepresence-robot

Has anyone come across any controller that does this? Its packed with a lot of things in a tiny form factor.. I feel the pricing is not bad, considering there is nothing like this in the market.. what do you think?

too bad its not selling in US yet.. 

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Chris Albertson
Redondo Beach, California

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[Pedro Tiago Pereira]

Happy New Year !

I agree with Chris there tons of similar designs/ideas. 

If you are looking for "combo" controllers or kits: check adafruit, pololu, sparkfun, seeedstudio, dfrobot.

   

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[Chris Albertson]

On Fri, Jan 1, 2021 at 3:08 PM Gmail <thomas...@gmail.com> wrote:

Sounds like an opportunity. 

It seems like a good opportunity for some robot club

What if tested and known-to-work design files were on a web site.  You drag them to the JLCPCB website and click "buy", they are made in about 24 hours then DHL delivers five of them.  PCBs would cost the end-user about $1 plus BOM cost plus shipping. 

[Gopi Palaniappan]

That would be awesome for prototyping and trying out new designs.

Btw, I haven't come across a 4 channel hbridge + servos + arduino anywhere... NodeMCU/ESP32 motor controller mostly have two channels. Please share a link if there is anything costing less than $20

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[Wayne C. Gramlich]

On 1/1/21 6:40 PM, Chris Albertson wrote:

> On Fri, Jan 1, 2021 at 3:08 PM Gmail <thomas...@gmail.com <mailto:thomas...@gmail.com>> wrote:
>
> Sounds like an opportunity.
>
>
> It seems like a good opportunity for some robot club

All:

The HR2 is basically a club robot I've been working on for a year:

https://github.com/hbrobotics/hbrc_ros_robot_platform

The PCB's were sent to JLCPCB earlier in the week. It lives on a Pololu Romi base and
uses an STM Nucleo-144 (the F767-ZI) board.

Regards,

-Wayne

>
> What if tested and known-to-work design files were on a web site.  You drag them to the JLCPCB website and click "buy", they are made in about 24 hours then DHL delivers five of them.  PCBs would cost the end-user about $1 plus BOM cost plus shipping.
>

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[Chris Albertson]

This one looks good for $6.

The description is sparse but it does say "4 bi-directional DC motors and it appears to have two L293D chips.

https://www.amazon.com/HiLetgo-Driver-Shield-

It was suggested as a board to power this little robot chassis

https://www.amazon.com/SZDoit-Chassis-Robotic-Platform-Encoding

I like the above chassis because it is (1) the optical encoder wheels, (2) convex profile plastic wheels, the concave type are "junk" and (3) a metal chassis.

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[Sergei Grichine]

A problem with the "combo" board is reliability and replaceability of its components. If you burn a servo or motor driver, if you are not happy with IMU performance, if you need to drive more powerful motor - or your code just refuses to work with one of the components  - you are up for a costly and unpleasant journey. So, I'd always choose a "my lego" freedom over "somebody's ideal combo".

Once you standardize on I2C connectors (see Pixhawk) and dont mind soldering everything - combining from best available components seems much more attractive than messing with combos. Just IMHO.

Best Regards, 
-- Sergei Grichine 

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