Qball's Weblog

Low power with atmega328pb and NRF24L01+

Recently at work I had to do some experiments with the classic nrf24l01modules. These a...

September 17, 2023

Making the stupid dumb V2. UPPÅTVIND

About 1 1/2 year ago I made a blogpost about making the Förnuftig smart. Thisone is sti...

January 15, 2023

Getting NTFY.sh going

Doing a lot in home-automation one key part is notifications. In my opinionnotification...

January 09, 2023

Hitting a new low-power record with the esp32c3 - part 2

To get to the low power usage of the previous blog post there several steps Itook. The ...

December 13, 2022

Hitting a new low-power record with the esp32c3

When looking up some information I blogged about in the past, I realized Ihaven’t poste...

December 12, 2022

Parkside Performance Smart accu 20V - 8Ah - Small review

Since a few weeks lidl sells Parkside Smart Batteries.The batteries have an impressive ...

January 30, 2022

Bad power supply unit might kill your MCU, do not buy!

On my balcony I have a very small solar panel setup that I use to keep a small car batt...

October 04, 2021

Making the stupid dumb. Vindriktning and Förnuftig

A while back I saw rumors that IKEA was introducing air quality sensors andair-purifier...

July 22, 2021

ESP32-S2-Wroom - new lows in power saving.

Two weeks ago I was shopping on mouser to find some GPS modules (might blog about this ...

May 18, 2021

My solution for a cheap air purifier - part 4

I made a few small updates to the air purifier to finish it off.New lidTo reduce sound ...

May 02, 2021

My solution for a cheap air purifier - part 3

This part will describe the electronics for this 2nd air purifier.I had a nice 24V fan ...

May 02, 2021

My solution for a cheap air purifier - part 2

2nd part of air purifier. I just finished printing v2. The overall result is very nice,...

April 30, 2021

My solution for a cheap air purifier

Seeing some recent ‘fuzz’ about making your own air-purifier, for example on BigClive.c...

April 27, 2021

LiFePO4 and ESP-Now - Part 2

As a follow up on the previous blog post.LiFePO4As mentioned in the last blog post I ha...

April 04, 2021

LiFePO4 and ESP-Now

As a follow up on the 19+ Months battery lifetime, a few small updates:LiFePO4As mentio...

April 04, 2021