525 Results for "raspberry pi"

It's a tablet! (Rev2 PCB testing)
Log from Put a Raspberry Pi CM4 into an original iPad
It works! I ordered the second revision of my PCB a few months back, and have been slowly working my way through testing and debugging the functionality. So far, the PCB hasn't required any modifications -- all the issues I've encountered have been soldering...

Attempting to tune the touchscreen controller
Log from [HDP 2022] Put an RPi CM4 into an original iPad
For reasons documented in a previous log entry, I am using the GT9110 touchscreen controller from Goodix. (Essentially, this is the only suitable touchscreen controller I could find in a footprint that I could actually use without spending hundreds...

BPI-PicoW-S3 Getting Started, Code CircuitPython with Mu Editor
Log from The BPI-PicoW-S3, A New Player in Town
BPI-Pico-S3 has the same dimension as the Raspberry Pi Pico board, equipped with an ESP32S3 chip, an 8MB flash, 4-layer PCB, electroplated half-hole process, ceramic antenna, supports 2.4 GHz Wi-Fi and Bluetooth® LE dual-mode wireless communication,...

Ordering Process
Log from SGVHAK Rover 2.0
Starting out: The first thing we did was file for 15% discount for goBILDA. Next we made a shopping list with check boxes based on the Parts List. What I wished I did next was reference the Errata Tracker to see which parts were incorrect....

Initial Design Thoughts
Log from AR Workbench
I started wondering how much this was going to cost me, and decided to try to build it with what I already have - at least for a first prototype. If funding should somehow magically appear, I can consider the ideal components. Admittedly,...

No Pain, Just Memory Gain:Using the Pro Mini XL with The Things Network
Log from Searching for a better Pro Mini
TL;DR I got the Pro Mini XL working with the Arduino-LMIC library. It’s performing OTAA to The Things Network over LoRaWAN. And it’s reporting temperature and humidity measurements from an SI7021 sensor - with 80% program memory to spare! (Note: There’s...

Introduction (why do we care?)
Log from FlexSEA: Wearable robotics toolkit
Note: this is copied from my thesis, please refer to the full document for references and additional graphics."Reinventing the wheel" is an idiom often associated with engineering and design. While innovators use the expression to describe a ground breaking...

New Year Reflections
Log from Tote
Year's SummaryThis is one of my oldest projects, and definitely one that I have put the most total work into so far. With the year's end, I decided to reflect a bit about the progress made so far and the way forward.There wasn't a lot of activity, but...

Hardware: making the phone accessible and using Chinese breakouts
Log from ZeroPhone - a Raspberry Pi smartphone
The phone has to be accessible, and by that I mean that the components should be easily sourceable. What are the criteria for this?Less obscure components. If there's somebody not able to get the DC-DC chip or specific inductor I'm using (say, shipping...

Dice Assembly
Log from Pixels
I put together a short video of how I assemble a die, for anyone who's interested! Here are the steps shown in the video, and some notes to go along: ---------- more ---------- 1. Receive boards (and components) from PCB factory Soldering components...

Interim battery replacement succeeded, but it still won't boot…
Log from Radical Tablet Repairs
For a few months now (i.e., before the battery got really bad), I've been thinking that I would like to take the innards of one of my USB batteries (i.e., four 18650s connected in parallel, plus a circuit that controls charging and discharging and converts...

The Instant Camera and How It Came To Be
Log from Inverse Thermal Camera
In November 2011, I bought 5 thermal printer modules from a surplus store because they were 1 € each and what could be more interesting than having a small printer to stick to a project? When they arrived at my doorstep, they immediately went...

Designing an Even Smaller Balance-Bot
Log from Mini Self-Balancing Robot - RasPi + Arduino
After reflecting on the first version of our mini self-balancing robot, I was wondering how I could improve the design and perhaps make it even smaller… We’re going to do an exercise in system design - which I love almost as much as creating robots...

The driver board
Log from Inkycal - Your own E-Paper Dashboard
E-Papers are little odd. The bi-stable nature, which basically means these displays only needs power to change the content of the display, but no power is needed to retain it. Therefore, you can display an image, remove the power plug or battery,...

Putting Ideas Into Practice
Log from Multislope ADC
The multislope ADC's potential 6.5 digit resolution means there are some finer details to the actual implementation. The first thing is the reference voltage. The go-to choice for high-accuracy bench DMMs is the LTZ1000. Given its price, availability...

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