I am glad to share the successful import of components for fifty PM2.5 sensor systems. For the low-cost sensor systems, most items are available in Addis Ababa – but for a much higher price due to import restrictions. Last month, fifty pieces of all components were ordered in The Netherlands, and I was able to bring all these items into Ethiopia. For total costs of 2500 euro, and additionally 90,000 ETB of import tax, we have enough materials to construct more than fifty new measurement instruments. Considering that all measurements up to now have been conducted with approximately twenty systems, this is a huge increase of the measurement capacity.
A list of all materials, with links to the sellers:
- 50 Arduino Mega 2560 microprocessor boards;
- 50 PCB prototyping boards;
- 50 microSD card SPI modules;
- 100 microSD 512MB cards;
- 56 SPS30 Sensirion sensors;
- 100 JST 1.5mm 5Pin female cables;
- 20 BME280 sensors;
- 70 Li-Ion 18650 battery shields;
- 10 battery shields for two 18650 batteries;
- 10 battery shields for four 18650 batteries;
- 50 Li-Ion 18650 batteries;
- 10 memory card readers;
- 30 1-meter microUSB cables;
- 20 2-meter microUSB cables;
- 50 USB adapters
- 50 DS3231 real-time clock modules;
- 50 USB A – USB B cables of 25 cm.