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March 28, 2016
Some fun project ideas using the SparkFun 9DoF Razor IMU. We'll touch on how to send data over Bluetooth and how you might start to use the board to rig up your own VR headset.
Tutorial - MAX30105 Particle and Pulse Ox Sensor Hookup Guide
about 3 weeks ago
That library relies on the SPO2 algorithm that we use from Maxim. Unfortunately, we don't really know exactly how it works (beyond the sensor measures changes in light absorption due to oxygenated blood). In my experience, the SPO2 readings can be inconsistent, but the heart rate readings should be pretty accurate.
about 2 months ago
Unfortunately, I don't know. The SAMD21 is an Atmel chip, so you should be able to do your own development with Atmel Studio.
You are correct. According to the Eagle files, they are 50 mil pitch (.05"); I heard my coworker wrong.
Those pins are for SWD; they are 50 (not 15... see reply below) mil pitch. In production, we use an Atmel-ICE programmer. You can use any similar product as long as it is AVR/SAMD compatible. As with all programmers, you are flashing the microcontroller... so yes, the bootloader would get overwritten. However, the bootloader is available in the Firmware folder of the GitHub repository if you need.
News - Friday Product Post: Goin…
about 2 months ago
I have a request in for a description change to highlight that it is a 3.3V board and not a 5V board. Unfortunately, I didn't work on the board and I'm not familiar with the new bootloader, so I can't answer your other questions.
We do offer an RTC that we sell separately, that can be used with the Qwiic connector system that might be useful for you. Check it out here!
Ask and you shall receive... (well in this case at least,) we added the RGB LED to the features list. Thanks for the heads up on that!
about 2 months ago
I had a similar experience testing the BlackBoard on a Mac High Sierra with the older version 1.3 driver. However, the board only caused the Apple computer to reboot until the board is removed. I was able to reboot and update the drivers once the board was removed.
You can download the version 1.5 driver here. There are instructions for updating the drivers in the .zip folder. Otherwise, you can also follow the instructions from the RedBoard Qwiic Hookup Guide.
For the most up to date drivers, check the chip manufacturer's (WCH) website. Most of the pages are in Manderin, but if you use a Chrome browser, the Translate option that pops up works pretty well with translating the page into English.
Tutorial - How to Use Remote Desktop on the Raspberry Pi with VNC
about 9 months ago
Parsec is another good option; especially, for gaming or viewing videos [https://www.parsecgaming.com/]. It is primarily designed to connect to a gaming host computer though (it should work with most mid-level PCs). I tested it with my work computer and was even able to work on SolidWorks (there were some quirks rotating objects, but nothing too bad) and stream a video at the same time without any issues on a Pi 3. I tested Parsec with Fortnite and PUBG with a Pi 3B+, the setup works fine if you lower your graphics and there is a small lag from the server connection (3-5 ms with Ethernet); overall very playable (I averaged 30-45 fps).
The installation is extremely simple:
Tutorial - SparkFun Inventor's Kit Experiment Guide - v4.0
about a year ago
I recently had a customer contact us about the illumination profile of the RGB LED. These are the resistor values he recommended for an even illumination across the RGB colors.
“I used a Texas Instruments OPT3001 to accurately measure the output as would be perceived by the human eye and used this information to create more appropriate resistors values: red: Lux=61.26; actual resistor value = 217 Ohms; Nominal resistor value = 220 Ohms green: Lux=55.24; actual resistor value = 4640 Ohms; Nominal resistor value = 4700 Ohms blue: Lux=53.34; actual resistor value = 2273 Ohms; Nominal resistor value = 2200 Ohms.”
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