Skip navigation
mfetting

MiniZed Midi Notes

Posted by mfetting Nov 4, 2019
MiniZed Midi Notes   Create a wind chime that transmits the XY position of its sail as a value to a receiving station.  The receiving station (MiniZed development board) converts the XY position to a midi value which in turn can be sent a raspberry pi which plays music and controls lights.   MIDI Note Number, Frequency Table (source) octave -5Octave Name MIDI Octave MIDI Note Number Note Name Frequency Hz Absolute Cents -- -5 0 C 8.1757989156 -6,900.0000 -- -5 1 C#/Db 8.661957 ...
My goal is to have a keyboard interface that would enable the use of a USB keyboard with a Kaypro computer.  The Interface will allow input from a USB Keyboard and communicate via TTL serial (transistor-transistor logic) through the J2 serial interface using the (rj9) connection on the back of the Kaypro (4 wire, 300 baud interface).   While 300 baud may seem somewhat slow, it is equivalent to 30 characters per second, which is faster than I can type.   I plan to use a Raspberry ...
  Kaypro 10  In June of 1983, Non-Linear Systems introduces the Kaypro 10, it shipped with one double-sided double-density (DSDD) floppy disk drive and a 10-MB internal hard drive. Currently, replacement parts for both the floppy and hard drive are limited to used items with increasing prices and questionable reliability.  Given the choice of maintaining the Kaypro 10 as rarely used museum pieces or continue its useful life as an example of what technology was like as computer be ...
My Rocketfish RF-WS02 Digital Wireless Speaker uses a proprietary 2.4GHz wireless communication system to transmit low-latency, high fidelity audio from an audio source to the speaker.  Which worked great at first, but has developed an annoying issue of dropping the 2.4GHz signal sporadically (recovers after a few seconds).  I could use a different Bluetooth speaker that would be smaller and likely cost less, but would miss the fun of extending the life of a useful product.   ...
Utilizing the SunFounder PN532 NFC RFID Module Kit to control physical access to a building. The Azure Sphere supports universal asynchronous receiver-transmitter (UART) for serial communication. The UART provides the ability to send and receive data over a serial port to a peripheral device. The SunFounder peripheral was selected to show utilization of low cost RFC/RFID sensor (less than $12.00 US).   The NFC tag is a passive data stores which can be read by the PN532 device.  The PN ...
Wheelchair Monitor   The number of Americans ages 65 and older is projected to reach 95 million by 2060*, bring the percentage of this age group in the total population to approximately 23%.  An increasing number of older adults wanting to live independently will require the means for medical professionals and family members to remotely monitor their situation without intruding on their privacy.   This project will monitor a wheelchair, utilizing sensors, tracking the status (P ...