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Just ordered a @PiSupply LoRa Gateway HAT for Raspberry Pi (RAK 2247 based). Planning on using it for a @thethingsntwrk gateway. #IoT

Wireless and battery powered bistable (latching) relay IoT node with practically unlimited standby listen time. Relay is rated 16A/230V. Controlled by ESP32+RFM69 gateway (WiFi, MQTT). What practical usecases for this can you think of?

Lowpower listening on 433Mhz while consuming 1.2uA. Range about 100m, reaction time about 800ms-1.5s. The node on the right sends data/awakes the node on the left upon button press, consumes 300nA in standby. Using RFM69 transceivers with Atmega328 and @LowPowerLab 's library More details under scope: the receiver wakes for ~250us every second, consuming 19mA…

Dug up an old prototype of a low cost monochrome 7 segment LCD display + DS18B20 temperature sensor + Atmega328 + RFM69 433Mhz transceiver project. 30uA sleep current. e-paper is still relatively more expensive alternative. #IoT

Just received my first handeld ham radio. The Baofeng UV-5R seems to be a popular model, feature packed, powerful (1/4/8W?? selectable) and dirt cheap. Switched TX power to 1W to avoid accidental transmission interference until I get proper ham radio license.

Do clean your PCBs after soldering the components. Before/after power consumption measurements, the soldering flux, dust create tiny, invisible pathways for current to leak.. #IoT

CuurentRanger firmware cusomizations and update completed

Now that I own a 'current ranger' device, I am measuring the power consumption of old projects of mine. Pictured below a Atmega328+RFM69 based smoke alarm detector, standby current is 6.5uA so practically no battery impact..

Kenwood breadmaker hub & drive coupling assembly replacement instructions literally say take apart the breadmaker to pieces in order to replace the broken drive. Estimated repair time: 1 hr 30 min. Me: drill the bottom out, swap the part and be done in less than 15 min The replacement instructions: https://www.espares.co.uk/advice/careandmaintenance/replacing-a-breadmaker-hub-and-drive-coupling-assembly-twist-and-lock

@LowPowerLab Current ranger just arrived, excited to test out

Testing a cheap PIR sensor, seems to be working fine down to 2.0V with no modifications (strange?). 25uA quiescent current at that voltage. Considering it for a battery powered PIR IoT node. Power consumption at 3.0V:

What is the proper shielding enclosure and measurement location (indoors/outdoors) for Geiger counter projects? Taking mine outside gives Chernobyl level readings , indoors is 0.15uSv/h (15-25 cpm) .. so obviously direct sunlight affects the GM tube heavily, and it must be shielded. Good information here: https://www.gqelectronicsllc.com/forum/topic.asp?TOPIC_ID=4540

Completed a connected environmental radioactivity monitor project. Pumps live data to the geiger counter world map http://gmcmap.com, records readings history for dashboard visualization and alerts me if abnormal values are detected. #IoT

Geiger counter kit just in, planning on recording readings over time and setting up a cloud based alarm. Aliexpress link: https://a.aliexpress.com/_BTKtci

My ZX80 disassembly notes on the back of my ZX Spectrum Basic programming book. Sent me back to 1988 for a moment..

Trained my D.O.G. (Digital arrOw Grabber) project's NNN (Natural Neural Network) to fetch back arrows through positive reinforcement #AI

33 FPS on simple brightness settings GUI on #esp32 + LVGL v7

HMI development on my laptop, then flashing onto #esp32 using #lvgl

Toying with LVGL v7 on my Mac in preparation for upgrading my embedded projects to that version. By the looks of it, it will take a few days of fiddling. Why do they make so many breaking changes? Had to go through the same hell when upgrading from v5 to v6; Deja Vu…

Added a power consumption to color indicator as a long distance visual reminder to reduce power usage. Quite effective by the way 🙂

Just received one of these optical fluid sensors after 2 months in transit.. No documentation at all, wondering what is the fourth wire for..

Drive your car by any of my home security cameras and they will log your license plate and timestamp. Not sure it is proper or even legal, but it took me 10 minutes to do it with Node-RED and openalpr #security #IoT #AI