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A project log for Choose your own adventure bot

Ultra low cost 3D printed Open Educational Resource Walking Robotic Platform

shanesnipeshane.snipe 11/06/2021 at 10:173 Comments

I received two big shipments for parts. 

First my parts I ordered from Ali Express arrived. This is first time i have gotten parts since the pandemic started and shipping started to suck. Took about a month which is about where it was pre-pandemic so that is awesome.  I got the following parts in:

Blue metal gearbox motors.  - I have been overpowering the 1:120 gearbox with the new 7-8V design.  I am hoping the 1:90 metal gearbox motors stand up better. 

Longer FFC's - I could not get anything longer than 8 inches on Amazon.  I got some 10 and 12 inch versions so I can go back and make the full sized version now.

Tablet speakers -  I got the speakers in the description with the adhesive front and back. I think this will easily double the sound. They are twice as big so that is logical right! Actually  I think it has more to with controlling the front and back cavities on the speakers and having a adhesive mount will make that easier. I am looking forward to experimenting with these.

The second shipment was new PCB's. Cya 1.0. The improvements are:

1) Added a switch between the BMS and the rest of the circuit. Now you can charge without the robot being on. Also the BMS can come up to voltage before it starts powering the regulators. When I did not do this, the regulator when to 1V instead the 7-8 expected with two batteries in series.  

2) Corrected polarity on the power jack.

3) New silk screen with the SCL and SDA positions corrected on the battery and the new version and logo.

Here's hoping that my power circuit is finally done and dusted.

I got twenty of them so if anyone is interested, leave a comment and we can connect so  I can send you one.

Blue motor

1:90 metal gearbox.

200, 250, and 300mm FFC’s.

Tablet speakers

New PCB with switch

Power jack and BMS work.

Regulator orientation

Getting ready to rumble.

Discussions

shane.snipe wrote 11/13/2021 at 10:41 point

Sorry wrong link. https://www.amazon.com/gp/product/B07T7NY1DJ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

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shane.snipe wrote 11/13/2021 at 10:40 point

Yes. Here is the Amazon link. https://cad.onshape.com/documents/090e28431662267442a38c78/w/26598236b7b4ff63fa80c892/e/09bc14a7b77b9a64207eafa1

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Doug Kimber wrote 11/06/2021 at 21:37 point

I really like the circuit board holders in the last photo - the one with the voltage regulators in the sockets. Are those magnetic on a magnetic baseboard?

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