Difference between revisions of "User:Bertrik Sikken"

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  |Tagline=heb ik niet
 
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You can reach me at bertrik@sikken.nl or bertrik@gmail.com
  
 
Studied Electrical Engineering at Twente University.
 
Studied Electrical Engineering at Twente University.
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Main interests:
 
Main interests:
 
* reverse-engineering things (USB stuff, mp3 players), working on http://rockbox.org
 
* reverse-engineering things (USB stuff, mp3 players), working on http://rockbox.org
 
* studying bats and making electronics for recording/listening to bat sounds
 
* studying bats and making electronics for recording/listening to bat sounds
* software-defined radio
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* radio stuff, in particular software-defined radio
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Projects I work(ed) on ([https://revspace.nl/index.php?title=User:Bertrik_Sikken&action=purge refresh]):
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{{#ask:[[Category:Project]][[Project Contact::bertrik]]
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|?Project Status
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|order=ASC,ASC
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|sort=Project Status,Project Name
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Old project ideas:
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Project ideas for 2016:
* do cool stuff with NRF24L01+ modules, e.g. connect one to the SPI bus of a Raspberry Pi
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* Understand LoRa modulation a bit better, ultimate goal is to create an SDR algorithm to decode LoRa without the need for dedicated LoRa hardware. This could be useful when tracking HABs transmitting LoRa for example. See [[DecodingLora]]
* experiment with [http://mqtt.org MQTT], a light-weight publish/subscribe framework for telemetry data
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* play with the Cypress PSOC5 platform, which combines a ARM Cortex-m3 processor with configurable analog blocks. I'm thinking of combining it with a 24 GHz doppler radar sensor, to process the signal and present it as a USB audio device (stereo signal contains I and Q parts). See [[RadarOnAStick]].
* 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:
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Project ideas:
* Use two old satellite dishes to allow speech to be transferred over some distance
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* Create a 'HabAlert' android app, see [[HabAlertApp]]
** Figure out focal point
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* Experiment with an ESP8266 serial-wifi module, WiFiBat project plan:
** Create some kind of dish mount
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** attach an ESP8266 to a migrating bat/cat/hedge-hog/marten/etc and program it to record a list of wifi APs every day, so the location over time can be determined from the AP-list (use Mozilla geolocation service to convert from AP-list to location), main challenge: keep weight and power consumption low. See my [[EspWifiTracker]] project .
* 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
 
** Goal: get a notification on your smartphone when a highaltitude ballon (HAB) is coming into reception-range
 
** How:
 
*** use a dedicated machine to retrieve current HAB positions from spacenear.us or habhub.org
 
*** keep track of HabAlert subscriptions, check notification conditions and send out notifications
 
*** use (for example) [http://developer.android.com/google/gcm/index.html google cloud messaging] framework to send push notifications that are quick and low-power
 
*** android client application receives notification, shows current HABs in either list (sorted by 'visibility') or map
 

Revision as of 19:31, 13 April 2016

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
  • radio stuff, in particular software-defined radio


Projects I work(ed) on (refresh):

 Project Status
FrontDoorDisplayAbandoned
HabAlertAppAbandoned
ISSOAbandoned
IbmPosDisplayAbandoned
Pico TrackersAbandoned
RadarOnAStickAbandoned
WifiLampAbandoned
A4PaperDispenserCompleted
BuildStatusTrafficLightCompleted
CJMCU-811Completed
CO2MeterHackingCompleted
CrawlSpaceSensorCompleted
DecodingLoraCompleted
DustSensorCompleted
ElectronicLoadCompleted
EspNowSkipCompleted
IntakefancontrollerCompleted
LichtKrantCompleted
LoRaGatewayCompleted
LoraBatBoxCompleted
LoraWanNodeCompleted
MHZ19Completed
MainsFrequencyCompleted
MiniSTM32F103ZECompleted
PowerLightCompleted
RC522HackingCompleted
RevRadioCompleted
STM32Completed
Secure iButtonCompleted
SoilHumiditySensorCompleted
StofAnanasCompleted
StofradarCompleted
TTNHABBridgeCompleted
VINDRIKTNINGCompleted
ZigbeeCoordinatorCompleted
Sensor-data-bridgeCompleted
AntiLostIn progress
AudioMothIn progress
CubeCellIn progress
EspAudioSensorIn progress
Esp32camIn progress
FMCWRadarIn progress
LoRa-E5-miniIn progress
LoraWanDustSensorIn progress
MainsFrequency2.0In progress
Msi2500SDRIn progress
Sim7020In progress
StereoBatRecorderIn progress
UltrasonicPlayerIn progress
EspNowAudioInitializing
... further results


Project ideas for 2016:

  • Understand LoRa modulation a bit better, ultimate goal is to create an SDR algorithm to decode LoRa without the need for dedicated LoRa hardware. This could be useful when tracking HABs transmitting LoRa for example. See DecodingLora
  • play with the Cypress PSOC5 platform, which combines a ARM Cortex-m3 processor with configurable analog blocks. I'm thinking of combining it with a 24 GHz doppler radar sensor, to process the signal and present it as a USB audio device (stereo signal contains I and Q parts). See RadarOnAStick.

Project ideas:

  • Create a 'HabAlert' android app, see HabAlertApp
  • Experiment with an ESP8266 serial-wifi module, WiFiBat project plan:
    • attach an ESP8266 to a migrating bat/cat/hedge-hog/marten/etc and program it to record a list of wifi APs every day, so the location over time can be determined from the AP-list (use Mozilla geolocation service to convert from AP-list to location), main challenge: keep weight and power consumption low. See my EspWifiTracker project .