Toying with some funky touch GUI icons
Toying with some funky touch GUI icons
FOTA update without external flash for Atmega32U4 + RFM69
FOTA for the ATmega32U4 + RFM69 without external flash – the dual-bank trick that Moteino solves with a flash chip, done without one.
Spectrum analysis with RFM12B
Poor man’s spectrum analysis with the RFM12B – scanning the 868MHz band to check how noisy my chosen channel really is.
Funky v3 with RFM69CW using LowPowerLab’s RF69 library
Running the Funky v3’s RFM69CW on LowPowerLab’s native RF69 library instead of Jeelib – what changes and what you gain.
Using DS18B20/DHT22 temperature sensor with internal pull-up resistors rather than external ones
Testing a 4-line OneWire library change that lets the DS18B20 run off internal pull-ups – no more pesky external 4.7K resistor on SMD boards.
Using RFM69CW instead of RFM12B
Swapping the RFM12B for the pin-compatible RFM69CW – +30% range and better sensitivity for roughly the same price.
Funky v3 and YAPM project files now on github
Funky v3 and YAPM Eagle design files are now on github – a tiny low power wireless Leonardo and a cheap power monitor, free to build.
My dog as smart wireless DVR sensor
My dog turns out to be an excellent motion sensor – correlating her barking on the DVR with alarm events, 25km from Sofia.
Keypad as USB keyboard
Turning a matrix keypad into a USB keyboard with the Funky v2 – convenient numeric entry for a few projects in the pipeline.
Hot water tank controller project – part 2
Hot water tank controller part 2: code finalized, a week of runtime, and a small HTML page driving it through an emoncms.org feed.
Smart IoT solar hot water tank controller
A smart IoT controller for my solar hot water tank – mode switching (manual/auto/anti-freeze) driven by an emonCMS feed.
Funky v3 PCB populated
Funky v3 PCBs populated and briefly tested – double-row headers soldered on the test unit, first impressions of the new board.
Funky v3
Funky v3: a major reshuffle of the v2 board routes 8 more pins (D9, D7, D12, D6, A3, A4, D0, D1) to pads in the same tiny form factor.
CR2032 battery discharge pattern
9 months and 10 days on one CR2032: the discharge pattern of a coin cell powering a Funky v1 + DS18B20 room temperature node.
Clapping to control RF power sockets
Clap-controlling RF power sockets with a Funky v2 and a cheap sound sensor breakout – silly, fun, and it works.
Door sensor
Toying with a cheap magnetic reed switch door sensor – wireless open/close events for doors and windows via a Funky.
Every μA counts
Every μA counts on battery powered wireless nodes – the hardware and software tricks I use to keep sleep current microscopic.
Non-contact AC detection
Non-contact AC detection with a 1M resistor and a wire antenna – testing insideGadgets’ trick and learning why it works.
Trying out bistable/latching relay
Trying out a Ciseco bistable/latching relay – a brief pulse to switch, zero holding current, pretty cool for battery projects.
Raw infrared <> serial
Raw infrared to serial and back – one interface for every IR protocol my air conditioners, TVs and media gear happen to speak.
Flood alarm
A wireless flood alarm after my father’s leaking pipe flooded his place for days and cost thousands of Euro – cheap insurance.
Funky v2 revision 2
Funky v2 revision 2 adds a reset button – no more unrecoverable boards when a sketch disables USB to save power.
Wireless body temperature monitor/logger
A wearable wireless body temperature monitor for sick kids – remote logging plus a bedside status display with an alarm.
OLED analog clock
Adding an analog clock face to my OLED status display, plus a bitmap thermometer tracking the solar water tank temperature.
Reducing RFM12B transmission power
Reducing RFM12B transmission power to stop overloading nearby receivers – better link quality and lower battery drain.
Temperature to color encoding for visual status display using RGB LED
Encoding temperature as RGB LED color – read the solar hot water status from across the room, no display needed.
Optimizing DS18B20 code for low power applications
Cutting the DS18B20’s 750ms conversion time by dropping resolution – optimizing the sensor code for low power battery nodes.
Miniature OLED status display with Funky v2
A miniature 128×64 serial OLED as a status display for the Funky v2 – bright pixels, near-180° viewing angle, 30x28mm PCB.
3D printed Stevenson screen
A 3D printed Stevenson screen for my Funky+DHT22 – proper airflow instead of a black box with a few drilled holes and 99.9% RH readings.
7 months of sending and still going
7 months on the same CR2032 and the Funky+DS18B20 room temperature node is still transmitting – live chart included.
Logging manualy entered values to emonCMS using keypad
Logging body weight to emonCMS with a keypad and a coin-cell Funky v2 – punch in the scale readout, get a weight history graph.
Funky v2 now poses as LilyPad Arduino USB
The Funky v2 now poses as a LilyPad Arduino USB – same VID/PID, so the stock Arduino IDE accepts it without modifications.