www.earthouses.co.uk/tag/lime-render/ www.greenspec.co.uk/building-design/woodfibre-retrofit/ www.grandishdesigns.co.uk/external-insulation/ www.maverickmansions.com/ www.mikewye.co.uk/gallery/insulating-render/ – Great Read, East Devon Firm www.lime-green.co.uk/products/lime-render/finish-WP www.littlegreene.com/paint/finish/limewash billus.co.uk/wp-content/uploads/2019/07/techpaper14-keeping-warm.pdf
Big power advantages exist for using the ULP ( Ultra Low Power ) processor for regular tasks like recording a state change from a GPIO or ADC input, storing the information within the RTC memory, then waking the main CPU up when the information needs to be transmitted via Lora. The programming of the ULP can now be done via a simple MicroPython wrapper: github.com/ThomasWaldmann/py-esp32-ulp/ github.com/micropython/micropython/pull/3578 ULP examples github.com/espressif/esp-iot-solution/tree/master/examples/ulp_examples LoBo MicroPython for ESP32github.com/loboris/MicroPython_ESP32_psRAM_LoBo/wiki/rtcgithub.com/loboris/MicroPython_ESP32_psRAM_LoBo/wiki adds RTC.read and RTC.write NB: Still looking…
Sheepstor to Red Lake loop
Using power resistors is not feasable, but AC halogen bulbs are easily sources up to 500W , so multiple bulbs can be used to vary the current 120 Vrms 500 bulb watts 28.8 bulb resistance 52 battery voltage 93.88889 watts 1.805556 amps So on a 52V battery pack a 500w halogen bulb would draw about 1.8Amps Voltage can be monitored with a simple voltage divider to lower the 52V to something suitable ( < 3v probably ) Current can be…
Heltec – LoRa Node 151< 2uA sleep heltec.org/project/lora-node-151/ docs.heltec.cn/download/LoRa_Node_151.pdf docs.heltec.cn/#/en/products/lora/lora_node/heltec_lora_node_list_eu Bugger the Node 151 is not ESP32 and so is using different code! grrrr below is a simple codebase for there heltec.org/project/wireless-stick-lite/ github.com/HelTecAutomation/ESP32_LoRaWAN LoRaWAN module in Cgithub.com/mcci-catena/arduino-lmic#supported-hardware www.dragino.com/products/lora.htmlwww.robotshop.com/en/dragino-technology.html www.thethingsnetwork.org/forum/t/which-module-has-the-lowest-sleep-current/15622 …… Murata’s CMWX1ZZABZ (STM32L082 and SX1276)github.com/kriswiner/CMWX1ZZABZ hackaday.io/project/35169-hackable-cmwx1zzabz-lora-devices wireless.murata.com/type-abz.html shop.sodaq.com/868-915-mhz-lora-lorawan-module.html Grasshopper LoRa/LoRaWAN Development Board www.tindie.com/products/tleracorp/grasshopper-loralorawan-development-board/ £32STM32L082 Development Board with SX1276 LoRa Radio programmable using Arduino IDE via USB Connector RAK811 868Mhz LoRa LoRaWAN Module www.rakwireless.com/en/module/lora/RAK811 downloads.rakwireless.com/en/LoRa/RAK811/Hardware_Specification/RAK811_LoRa_Module_Datasheet_V1.4.pdf www.tindie.com/products/kilobyte/rak811-868mhz-lora-lorawan-module/ £17Standard original RAK Wireless RAK811…
stumbled upon this list Sleeping in a house makes you feel claustrophobic because there isn’t a hatch overhead to look at the stars. You know smaller is actually sometimes better. You find yourself bleeding from random places at random times. You and your girlfriend define “taking a break” as moving about six feet apart and looking in opposite directions. You avoid telling people you live on a boat just so you don’t have to explain to them how you shower… again. You are…
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There are various situations where clients can overload a website server, but you don’t want to return a 4xx or 5xx simply because the system is getting bogged down, instead it would be better to have a mechanism which tries to take the pressure off the backend server to give all clients a fair chance. Thankfully HAProxy has a couple of ways that requests can be slowed down on their way to the backend, the cleanest mechanism is to use…
The Frsky Taranis is a very cool RC transmitter with some serious advanced functionality. Here are a couple of URLs covering how to configure the unit for Adrupilot mode switching and also how to simplify auto tuning
In the event that something goes horribly wrong while at high altitude it makes sense that things come back down under a bit of control! droneyard.com/2013/07/01/uav-parachute-recovery-system/ What i’m struggling to solve is how to design the deployment system so that it does not tangle around the props when the UAV is falling in a tumble. I’m currently imagining a tub with either spring loaded deployment mechanism or a ballistic launch system.