Welcome to a new Voltlog, it’s product review time again, this time we’re taking a closer look at a 10 inch monitor with hdmi input. This is the box it comes in, the monitor has a resolution of 2560×1600, that’s about 2K resolution in the scheme of things, 300 pixels per inch density, 16:10 aspect ratio which I’m a fan of. My desktop monitor is also 16:10 and it works so much better for everyday activities but especially if you are doing any CAD design work. It’s an IPS panel so we should have good brightness, contrast and colors, it’s rated at 400 candela per sq meter. We also get built-in speakers and the HDMI supports video & audio so you should be able to get video and sound through the HDMI cable and that’s useful because we have built-in speakers on the monitor itself.
Tag: RaspberryPI
Voltlog #257 – ESP32 PIR Motion Sensor With Deep Sleep & MQTT (revB part2)
In this video I’m gonna show the second revision of my esp32, battery powered PIR motion sensor. This second revision contains some optimizations to improve deep sleep power consumption as well as to fix some of the errors I had the first revision of the pcb.
Voltlog #240 – ESP32 PIR Motion Sensor With Deep Sleep & MQTT
Welcome to a new Voltlog, in this video I’m gonna show you how I designed and built this board which functions as an esp32 based, battery powered PIR motion sensor. So I started by designing the circuit, I used some common building blocks, I added the ESP32 with it’s bypass caps, some test points and the programming circuit with auto-reset, I then added some connection points for the PIR sensor, an RGB LED because why not have a nice way to signal this is one of those very small digital RGB leds, it’s just 20x20mm, it’s connected to 3.3V even though it’s only rated for 5V so I’m hoping this is going to work even on 3.3, it’s also worth having a temperature/humidity sensor to also sense that in whichever room the node will be placed and finally the power supply circuit which is a simple low dropout regulator with an 18650 battery as the input.
I did not include a battery charger circuit on this module, because I wanted to keep things simple, I’ll have a battery socket so I can just remove the 18650 cell and charge it separately plus the whole circuit should run in sleep for extended periods of time giving me a long operating time so i wouldn’t have to charge the battery too often.
Once the schematic was finished I did the board layout in a hurry so it’s not exactly pretty or optimized
but I tried to move the esp32 antenna to the side, to place the PIR sensor in the top side as the module will probably sit vertically, I tried to place the temperature sensor in the bottom side to keep it away from any components that might get hot and also placed some isolation slots for the same reason.
You should check-out revB of this board, I made some improvements present in the video below.