Power Bank with 18650 Li-ion Battery

Power Bank with 18650 Li-ion Battery

Using micro controllers in the field requires battery power.  USB power banks are readily available, but these devices are not serviceable and cost substantially more than the components they are built from.  This post will cover battery power using a 18650 Li-ion cell.  It is based off of the work done here, https://circuitdigest.com/electronic-circuits/power-bank-circuit.  This diagram shows how these components are connected. The post referenced above had one flaw that should be avoided, the on/off switch was placed on the negative…

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Equirectangular Imaging – Capturing Cube Maps with ESP32 Cam Modules

Equirectangular Imaging – Capturing Cube Maps with ESP32 Cam Modules

The last post demonstrated how to stitch images captured with the ESP32 Cam module, https://www.cloudacm.com/?p=4624. This post will expand on that by using ESP32 Cam modules to capture cube maps. The following image is an example of the previous post stitching process, but it required some adjustments so that all source images were included, here is the command arguments used. py stitch.py –match_conf .25 –confidence_threshold .45 *.jpg Finding those argument values was time consuming with many trials and errors along…

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Python Generated Panoramic Images

Python Generated Panoramic Images

This post will demonstrate how to use OpenStitching, a python process for stitching images into a panoramic scene.  Details about OpenStitching can be found here, https://github.com/OpenStitching/stitching.  The manual process involved when using Hugin or Image Composite Editor are more time consuming.  The OpenStitching process can be automated to generate numerous panoramic images without the need to be in front of a computer. The OpenStitching example above was a series of images taken with the ESP32-Cam module on an earlier project. …

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