http://stopstogo.com/dokuwiki/ 2026-04-04T16:19:38+00:00 http://stopstogo.com/dokuwiki/ http://stopstogo.com/dokuwiki/lib/tpl/dokuwiki/images/favicon.ico text/html 2020-02-22T16:59:40+00:00 Anonymous (anonymous@undisclosed.example.com) http://stopstogo.com/dokuwiki/doku.php?id=projects:a4sim:hardware:ht16k33ledmodule:arduinoadafruitexample&rev=1582390780&do=diff Arduino Adafruit Example, to HT16K33 LED /*************************************************** This is a library for our I2C LED Backpacks Designed specifically to work with the Adafruit LED Matrix backpacks ----> http://www.adafruit.com/products/872 ----> http://www.adafruit.com/products/871 ----> http://www.adafruit.com/products/870 These displays use I2C to communicate, 2 pins are required to interface. There are multiple selectable I2C addresses. For backpacks with 2 Ad… text/html 2020-02-22T16:59:40+00:00 Anonymous (anonymous@undisclosed.example.com) http://stopstogo.com/dokuwiki/doku.php?id=projects:a4sim:hardware:ht16k33ledmodule:lowdependencyexample&rev=1582390780&do=diff HT16K33 LED Module - Low Dependency Example This works from an Arduino, talking to the HT16K33. It needs to be moved to a Raspberry Pi, because it is hard to have two Masters. #include <Wire.h> const uint8_t addr = 0x70; // HT16K33 default address uint16_t displayBuffer[8]; void setup() { Wire.begin(); Wire.beginTransmission(addr); Wire.write(0x20 | 1); // turn on oscillator Wire.endTransmission(); setBrightness(15); blink(0); } void loop() { const int dTime = 50; … text/html 2020-02-22T17:07:18+00:00 Anonymous (anonymous@undisclosed.example.com) http://stopstogo.com/dokuwiki/doku.php?id=projects:a4sim:hardware:ht16k33ledmodule:start&rev=1582391238&do=diff HT16K33 LED Module Purchased 3-pack of LED modules, to see flight control position. Requires Adafruit driver, which includes I2C sending. Note: This has to be run from an Arduino. * Low Dependency Example * <https://www.partsnotincluded.com/electronics/controlling-led-matrix-with-the-ht16k33/> Adafruit_LEDBackpack docs [Holtek Datasheet for HT16K33] Example code * Adafruit Arduino Example