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Lockable Drawers for Rivians Oct 20 @ 9:44pm
I wanted to document the pin outs for the Rivian camp speaker/accessory drawer pinouts and function. My end goal is get some powered stuff in that space and open it up for third party designs.
Rivian Camp Speaker PCB
Oct 20 @ 7:05pm

Rivian Camp Speaker PCB
NVR Hacking
Dec 8, 2018 @ 8:36pm

Hacking the Reolink NVR
Hacking A Reolink NVR Dec 8, 2018 @ 7:38pm
So I recently saw a great Amazon deal, the Reolink NVR (RLN8-410) with 4 POE cameras was $320 so I grabbed that and 1 Amcrest 4K camera (IP8M-2493EW). I got it setup and immediately found two things, while it completely supports ONVIF (an open, XML-SOAP based protocol to communicate with security cams and NVRs), there is no web interface (they claim there is, but it's an browser addon that only works on Windows and Mac). They also have a desktop client, but surprise it too doesn't work on Linux.

I then tried getting my Amcrest camera working, and it oddly doesn't work, it sees it, and then says it's offline, and then finds it again when I hit scan, but with a different port (port 80) and refuses to connect, trying to delete it or scan again just crashes the UI. So obviously it's connecting and not working. All well.

All of this has made me determined to change the NVR software, get something open, that I can get to read my 4K camera, that will allow me to download history via Linux, and something with a functional web interface. This is going to be my story on hacking the RLN8-410
PAR Lighting Calculator Feb 14, 2016 @ 2:05am
Plants require light to function, but they are sensitive to light at different wavelengths than humans, and that makes calculating the lighting required for indoor plant growth difficult, especially when all the light bulbs out there are rated in lumens, a measure of how bright they appear to humans. So I made a calculator to determine the actual PAR rating of a light setup.
RaspSub Software Overview Mar 8, 2015 @ 12:10am
The submarine is composed of two different applications, the first is the controller software, it runs the hardware, provides drivers for all the custom hardware I developed, and will eventually allow the submarine to operate independently from it's remote.

The remote, shown below is written to use GTK+3, it provides all inputs to the submarine (such as the joystick), and lets you view all the run data, including saved runs.

Submarine Software
Mar 7, 2015 @ 7:58pm
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Submarine Software
Mar 7, 2015 @ 7:58pm

First revision of the remote control software
AVR Programming Jul 29, 2013 @ 10:41pm
To control the servos on the submarine I am using an AVR (ATtiny24a). Besides controlling the servos the AVR is also acting as a secondary thermometer, reading the the battery voltage, and interfacing with the pressure sensor. It then forwards all of this over SPI to the Raspberry Pi.
Electronics Build Up Jul 15, 2013 @ 9:11pm
Making an electronics package this complicated pretty much required that I have a proper PCB produced instead of trying to use a protoboard or something. Turns out getting a board made is not expensive, it was about $75 from ITEADstudio. Using the gEDA tools I could make all the schematics and then convert those schematics to the right formats needed for the prototype PCB.