Friday, February 23, 2024

How to Make a Battery Case for two 18650 Cells

 How I made a dual cell holder for 18650 cells to be used in the Zoomie.  Being that the Zoomie is an autonomous robot, it will need to carry around its power source, in our case it will be two18650 cells.  Integrating the cell holder into the design of the zoomie is critical so that it is compact and allows for easy access to the cells for charging.


Cheers!
Chris

Monday, February 12, 2024

Recap and Update of the ZoomTown Experiment and What Has Changed

 It is time to review what sensors: A3141, TCRT5000, GP2Y0E03, AS5600 and other devices: N20 gear motor, and TB6612FNG motor drive have made the cut for the Zoomie (Autonomous Robot).  This video defines the baseline for the Zoomie to be used in the ZoomTown Experiment.

Cheers!

Chris

Friday, February 2, 2024

E015 Sensor Bracket Assembly For the Zoomie (Autonomous Robot)

With all the sensors selected for the Zoomie (Autonomous Robot) it is time to figure out how to mount them all to the chassis.  Keeping the size small, and mounting process simple is no trivial tasks.  Using Fusion 360 and the 3D printer made it possible.  These are the sensors to be mounted on one bracket: TCRT5000, A3141, AS5600, & GP2Y0E03.


Cheers!
Chris

Friday, January 26, 2024

How to use GP2Y0E03 Sensor for Object Detection

The GP2Y0E03 TOF sensor may be a good choice for our autonomous  robot's collision avoidance system.  It has a range that suits our needs good and it has two interfaces: i2c and analog output.  The Raspberry pi PICO has both interfaces making for an easy connection. 

The critical aspects for us are linear readings, relative accuracy, fast readings, and relatively consistent readings in various light conditions.  Let's see how well in performs in this practical test.



Cheers!

Chris

Saturday, January 20, 2024

E013 Can the TCRT5000 photo-reflective sensor Act as Proximity Sensor?

 For collision avoidance, the Zoomie needs a proximity sensor on the front to detect objects in the direction of travel.  A laser based TOF sensor failed to perform to our needs.  The TCRT5000 is investigated in this video as an alternative sensing device.


Cheers!

Chris

Friday, January 12, 2024

How the AS5600 Encoder Can Provide Odometry Information

The AS5600 digital potentiometer is a great device to help with Odometry in Autonomous robotic applications such as our Zoomie.  This device uses a small magnet that is affixed to the wheel or axel you are measuring the rotation of.  It is then read with an i2c interface that is very quick and efficient.



Cheers!
Chris

Friday, December 22, 2023

Can the VL53L0X TOF Sensor be used for Collision Avoidance System in the Zoomie?

The autonomous robotic car (Zoomie) will need to stop if something is in its path.  In this video, we scrutinize the VL53L0X Time of Flight sensor to see if it can meet the requirements of the ZoomTown Experiment.  Is it accurate enough? Can it be read quickly enough so that it doesn't bog down the performance of the PICO?  Let's find out...

Cheers!

Chris

How to Make a Battery Case for two 18650 Cells

 How I made a dual cell holder for 18650 cells to be used in the Zoomie.  Being that the Zoomie is an autonomous robot, it will need to carr...