User:Bertrik Sikken
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| User info Bertrik Sikken | |
|---|---|
| Name | Bertrik Sikken |
| Nick | bertrik |
| Tagline | heb ik niet |
You can reach me at bertrik@sikken.nl or bertrik@gmail.com
Studied Electrical Engineering at Twente University.
Main interests:
- reverse-engineering things (USB stuff, mp3 players), working on http://rockbox.org
- studying bats and making electronics for recording/listening to bat sounds
- software-defined radio
Old project ideas:
- do cool stuff with NRF24L01+ modules, e.g. connect one to the SPI bus of a Raspberry Pi
- experiment with MQTT, a light-weight publish/subscribe framework for telemetry data
- put the things above together in some kind of home automation project
- build a colinear antenna out of RG-6 coaxial cable for the 70cm band (for receiving high-altitude balloons)
- more radio stuff with the ham-it-up
- implement dominoex/thor radio mode for a balloon payload, perhaps build a light-weight reusable library
- come up with an algorithm to determine position/direction of bats as they pass a set of ultrasonic microphones, see StereoBatRecorder
- I've tried direct correlation, works but sometimes gives errors on bat calls with little frequency sweep
- Planning to try correlation of only the amplitude data (derived with a Hilbert transform)
New project ideas:
- Use two old satellite dishes to allow speech to be transferred over some distance
- Figure out focal point
- Create some kind of dish mount
- Reverse engineer the digital oscilloscope at revspace
- Figure out screenshot image format
- Try to find if there are other commands than the "send screenshot" command
More LedBanner audio visualisations- Create a RFM69HW TNC, based on code by flok
- Remove 'flok' framing, make it comply with KISS protocol
- Use 'infinite' package length mode to send typical TCP/IP frames (1500 bytes)
- Create a 'HabAlert' android app, see HabAlertApp
- add opus audio codec support to squeezeboxserver and/or squeezelite
- an opus web radio stream already seems to be redirected to the client, but squeezelite crashes on it
- create code for remote control of my ZwaaiLicht
- implement wireless protocol for the NOMZ message ("\x4NOMZ") on address 0x66996699L (no ack)
- possibly implement a more capable protocol on a different pipe (with ack, learn about extra pipes on NRF24L01+)
- possibly split control of the light and the motor
- create a voordeur display
- clearly indicates the RevSpace door bell
- show short scrolling text messages, e.g. to food delivery people
- remote control over NRF24, e.g. enable/display the display of messages, set the text to be displayed