Arduino Day 2021: Arduino Day Workshop and Drone Competition!

Drones do not need to fly.   Wheeled drones or droids work as well.

a WSPR transmitter:

Trying to go make a logic analyzer to enter in the Digital Logic p14

(using a corgi board, so CorgiLogic: the low cost corgi logic analyzer)

Then, I'll have another 2 weeks to try to make it better in time for Arduino Day.

In a recent project14 competition, I used the 28BYj-48 motors to drive my retrofit Mr. Machine (Mr. Machine gets an upgrade - Mostly working, but still needs a little some help. ).  I started with the ULN2003 drivers and then converted the motors over to bi-polar and used some H-bridge drivers () and then finally built my own H-bridge drivers using MTS2916A parts from Microchip.  In the end, I was really happy with the smoothness of these little stepper motors, but my alignment of the gears (my homemade ones and the existing Mr. Machine parts) were causing binding and not allowing Mr. Machine to move freely.  I am continuing to work on these parts and hope that I will soon have a better solution.

I still have a bunch of stepper motors and drivers that need a good project.  Maybe this can be my Ardunio Day 2021 project.

For Arduino Day I am making a binary clock. The idea of the time shown in binary code really appeals to me. The kids like it as well.

Dale W

Now $25 is not bad. I will have a look.

I'm using a 9g metal gear servo on my project, and no chattering.

I've gone as big as a LD-20MG servo for steering on a couple power wheels cars, I converted to RC,  these go for ~ $25.

Probably oversized a bit for small 40lb payload power wheels car, but is undersized for a 120lb payload 2 seater power wheels car. if its driven in grass. It gets by on the big power wheels car on a paved driveway.

I did research on RC vehicle servos. There appears to be some industry investment in those suckers. Some of them are over 100 bucks a pop! They were all metal construction, don't know if that make a difference and quiet, no chattering. The video was a torque test and speed. Pretty impressive. They were a little larger than the cheap plastic jobbies.

I'm trying to do the model railroad project on the cheap. Keeping to parts that are in my junk box makes that more of a reality. Now a free Arduino from this blog post would keep the cost done also:)

100% agree with your assessment of chattering servos.

I have a couple 28BYJ-48 motors with controllers thrown in a drawer and forget about them.

Thanks for the tip, I will have to remember to get them out on my next project.

Absolutely correct. I have a supply of 28BYJ-48 motors and ULN2003 controllers. Nice a quiet. I find servo's (cheap one) chatter to much.