Category Archives: embedded

Dear Atmel, Texas Instruments, Intel,…

… you all are big companies, you all say you support makers and hackers alike and you all are members of USB-IF. Maker community has a problem with USB-IF, which is probably best described in this blog post by Nick Johnson, so I thought, you, as members of this organisation and as supporters of maker community, could help convince USB-IF executives to be more open-minded and collaborative?

Thank you in advance,
Raivis Rengelis, one of makers

TCS34717 break-out or #SecretProject revealed [updated]

Jayson Tautic of TAUTIC ELECTRONICS LLC has teased his followers on twitter with some #SecretProject for a while and today was the big revelation – that is TSC34717 color/light sensor breakout.
Chip itself is a nice little gem by ams, first, it looks cool, second, it is capable of measuring R, G, B and overall luminosity with 16 bit precision each and has high dynamic range.
But there is a catch – it has weird power requirements, 3V supply and 1.8V I2C bus and it is very small. I made a decision to make the breakout 3.3V-5V compatible, so that it can be used with most popular development boards out there. Yes, I made that decision, because that was me who designed the breakout and pushed Jayson into producing and distributing it. Reason for not doing that myself is that I live in Latvia and small production runs of things like this is way more expensive than doing the same on the other side of Atlantic.
So there you are – 16bit color/light sensor with high dynamic range, compatible with 3.3V-5V hosts and communicating over I2C.
After getting first working prototypes done, joint decision was made to go on tindie with fundriser. That would let us find out if there is interest in this sensor and hopefully fund first production run. Meanwhile, I am working on Arduino library, so that break-out is usable from the day one with ever so popular prototyping platform.

The cool thing about this project is that I live in Latvia, Jayson lives in the USA and we have never met in person. Our only contacts are on internet, on twitter and tymkrs IRC.

[update]
the board is now on tindie – TSC34717 break-out fundraiser

AS3935 Franklin Lightning Sensor™ + Arduino

Just a short post.
1) AMS made a nice lightning sensor chip AS3935
2) Jayson Tautic from TAUTIC ELECTRONICS LLC made even nicer breakout board
3) I made Arduino library to make use of AS3935 easy on this ever so popular platform
4) and tested it on Arduino Mega 2560 and chipKIT MAX32

The code (hopefully) works with most of original boards and clones.

Here is the link again, just in case you missed it – https://github.com/raivisr/AS3935-Arduino-Library

propeller vs bluetooth hci

Just an update after long long silence. I am now trying to befriend Parallax Propeller with PAN1320 Bluetooth module.
Starting point http://svn.navi.cx/misc/trunk/propeller/usb-host/ (thanks Micah Elizabeth Scott) and Bluetooth specification.

One thing I do not understand about BT modules, why are all module manufacturers so secretive and require NDA to be signed to give you user manuals/datasheets? Really, wtf?