Skip navigation
In the previous post (links at bottom), I had used my Xiao Expansion board to play Christmas music stored on the SD card using the SamdAudio player.   I don't have an SD card on my QT Py ornament, but I did add a 2MB GD25Q16 external SPI flash chip to the QT Py.  The music file that I'm using, "we-wish-you-a-merry-christmas.wav", is 1.39MB - so it should fit in the flash memory.   I've previously used the SPI flash chip as external file storage for CircuitPython, so the interfac ...
For the final element of my QT Py Christmas ornament, I'd like to add the ability to play some Christmas music.   The SAMD21 has a single DAC output that I'll use to generate tones, but I'll also need to add an audio amplifier to drive a speaker and figure out how to access the external flash memory that I added to store the music files.   In this blog I'm going to cover adding the audio amplifier and generating the tones using the DAC.  I'll hopefully be able to get the music p ...
Fred27

A Lego Christmas game

Posted by Fred27 Dec 23, 2020
Holiday Special 20 Enter Your Holiday Project for a chance to win a tool kit bundle, shopping cart, and gifts to give to other members! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   A project idea (and some dead ends) If there's one thing that my kids associate with Christmas, it's Lego! More so than turkey, mince pies or a tree - it's often all about Lego. They tend to get at least some Lego as a present and they're currently sti ...
I know what I was doing a few years ago (2014 I think) as I was reminded by Facebook. See below.     Here is Santa riding in on my mobile robot at the Raspberry Jam I organised, possibly Christmas 2014, distributing sweets to any passing youngsters and/or students. Sadly I never got to see Santa as whenever I was present he seemed to have left the room.   Can I count this as a contribution towards the Holiday Special 20? Perhaps I'll have to do something else as well. Pity I s ...
My File Is To Large ...
The SAMD21 processor that is used on the QT Py has a built in Peripheral Touch Controller (PTC) that can detect touch on external capacitive sensors.  The PTC has a mutual-capacitance mode to sense touch on an x-y matrix and a self-capacitance mode to detect touch on a single point (pin).   The QT Py is in the 32 pin package so there are 6 capacitive touch pins available in self-capacitance mode (A0-A3,A6,A7).   Here is the PTC Block Diagram from the SAMD21 spec Adafruit ...
Having an interest in music and liking synthesizer music I thought it would be fun to create an analog version.  My primary experience has been with digital designs and robotic controllers, but very little analog work. While there are many software solutions available, I wanted the satisfaction of turning knobs and building the synth from the ground up. So I created a series of PCBs that provide the basic components needed for music generation.  I have a sequencer board (working now an ...
I am an Electronics engineering student from India as my country is one of the largest agricultural country in the world so I want to make technology for farmers for advanced farming.       For this I used ESP8266 WiFi module, Soil moisture sensor, Water level sensor, Rain sensor, PIR sensor, IR sensor, Stepper motor and relay... These are my one of those components which will I use for development of IoT based Smart Farming System (Hydroponics)... I am just working o ...
fmilburn

The Christmas Forest

Posted by fmilburn Top Member Dec 7, 2020
Holiday Special 20 Enter Your Holiday Project for a chance to win a tool kit bundle, shopping cart, and gifts to give to other members! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   Once upon a time there was a girl who wanted a Christmas Tree for her doll house.  So she asked her grandfather if he would help.  They found stickers to use for decorations and tiny fairy lights to make it glow.   And the grandfat ...
Me,  I don't do the tree thing. I do Hanukkah we all have a blast and eat till we are stuffed. Then New Year In NYC my home town  I love to shop Sax 5th Ave,  Bloomingdales, maybe in Macy's? So here's a little of the holidays!       Matzo Brei In this Matzo Brei (rhymes with fry) recipe, the matzo sheets are browned in butter until crisp before being lightly scrambled with eggs. Add black pepper, plenty of salt, and capers for a savory version, or  It& ...
ngdeao

Mission Defender 2021

Posted by ngdeao Dec 7, 2020
I was donated some non-working main boards from the old William's game Defender.  Including several ROM sets.  The biggest issues is the connectors for the insertable Ram/Rom chips are old and will not maintain good contacts.  My project is to build an authentic Defender standup game, using old parts from various non-working Defender games.  I have main boards, rom boards, wiring harness, coin door, and a control panel from original Defender machines.  I will need to cut ...
ralphjy

A QT Py Christmas

Posted by ralphjy Top Member Dec 4, 2020
Holiday Special 20 Enter Your Holiday Project for a chance to win a tool kit bundle, shopping cart, and gifts to give to other members! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   I was not going to do a Holiday project but there hasn't been a lot of joy and there has been a lot of stress this year, so I thought that it would be good to do something simple and colorful to lift our spirits.   I recently got an Adafruit QT ...
Holiday Special 20 Enter Your Holiday Project for a chance to win a tool kit bundle, shopping cart, and gifts to give to other members! Submit an EntrySubmit an Entry  Back to homepage Project14 Home Monthly Themes Monthly Theme Poll   Greeting cards are a simple symbolic way to convey a world of feelings to someone you can't be with. They are even more important and powerful in the social distancing era. I figure it is worth putting a little extra effort into creating the ultimat ...