This post will show how to use the ESP32-Cam module microSD media as non volatile storage for variables. Flash write cycles have a limitation which can limit the life of the module if overused. MicroSD media can be easily replaced as needed and offers a more suitable alternative when the module is repeatedly power cycled. The module will be used to capture images of the interior of a vehicle when in operation. Each time the vehicle is operated, a new…
This post will expand on the topic of data plotting which was discussed in this post, https://www.cloudacm.com/?p=4136. The concept is to give a quick at a glance view of information. Details can be lost in lengthy data sets formatted in tables or flat files, which are tedious to sift through. Data fatigue is problem for those not prepared to handle large amounts of information. The apathy it can foster can turn a resource into a liability. By using plots, it’s…
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…