Description
Cistercian Display
I have always loved displays, I really like anything that emits light and that is controllable, that is why I have created this new display that consists of the representation of numbers “Cistercian”, this single digit is capable of representing a number from 0 to 9999.
The controller that I have decided to use is a simple serial to parallel converter from LUMISIL embedded in the same PCB routing fewer pins to the castellated holes and making it easier to use overall, and also has the possibility to set a custom constant current source for the LEDs.
This Display needs some 3D printing for it to look like 31 segments display, for that iI used White PLA as a diffuser and some other color for the display body. The assembly consists of 1 PCBA and 3 3D printed parts, the display front face body, the diffuser, and the LED spacer.
Code
Arduino test code
C/C++
#include <WiFi.h>
#include <time.h>
#define SK6812LED 18
#define SERIAL_PIN 35
#define CLOCK_PIN 36
#define LATCH_PIN 33
#define ENABLE_PIN 34
#define HRS_LED 11
#define MIN_LED 10
#define MONTH_LED 9
#define DAY_LED 8
#define YEAR_LED 7
#define CLOCKCYCLES 3
#define UPDATERATE 2000
unsigned long requestDueTime;
unsigned int displayData = 1;
unsigned int turnOnClock = 0;
unsigned int prevMinutes = 0;
bool updateData;
const char *ntpServer = "pool.ntp.org";
const long gmtOffset_sec = -3600 * 6;
const int daylightOffset_sec = 3600;
const char *ssid = "YourWifi";
const char *password = "YourPassword";
// 1 to 9 digit cistercian representation
// 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
bool numberUnits[10][32] = { { 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 0
{ 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 1
{ 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 2
{ 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 3
{ 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 4
{ 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 5
{ 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 6
{ 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 7
{ 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 8
{ 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }; // 9
// 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
bool numberTens[10][32] = { { 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 0
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 1
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 2
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 3
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 4
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 5
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 6
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 7
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 8
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }; // 9
// 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
bool numberHundreds[10][32] = { { 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 0
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 1
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 2
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 3
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0 }, // 4
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0 }, // 5
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 6
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 7
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 8
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }; // 9
// 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
bool numberThousands[10][32] = { { 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // 0
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0 }, // 1
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0 }, // 2
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0 }, // 3
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0 }, // 4
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0 }, // 5
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 }, // 6
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0 }, // 7
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0 }, // 8
{ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0 } }; // 9
void setDigit(int digit);
struct tm timeinfo;
void setup() {
Serial.begin(115200);
pinMode(ENABLE_PIN, OUTPUT);
pinMode(SERIAL_PIN, OUTPUT);
pinMode(CLOCK_PIN, OUTPUT);
pinMode(LATCH_PIN, OUTPUT);
pinMode(MONTH_LED, OUTPUT);
pinMode(DAY_LED, OUTPUT);
pinMode(YEAR_LED, OUTPUT);
pinMode(HRS_LED, OUTPUT);
pinMode(MIN_LED, OUTPUT);
digitalWrite(HRS_LED, LOW);
digitalWrite(MIN_LED, LOW);
digitalWrite(MONTH_LED, LOW);
digitalWrite(DAY_LED, LOW);
digitalWrite(YEAR_LED, LOW);
digitalWrite(ENABLE_PIN, HIGH);
uint8_t wifiConectionAttmps = 0;
WiFi.begin(ssid, password);
Serial.print("Connecting to ");
Serial.print(ssid);
while (WiFi.status() != WL_CONNECTED & wifiConectionAttmps < 20) {
delay(500);
Serial.print(".");
wifiConectionAttmps++;
}
configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
digitalWrite(HRS_LED, HIGH);
digitalWrite(MIN_LED, HIGH);
digitalWrite(MONTH_LED, HIGH);
digitalWrite(DAY_LED, HIGH);
digitalWrite(YEAR_LED, HIGH);
digitalWrite(ENABLE_PIN, LOW);
setDigit(1111);
delay(250);
setDigit(2222);
delay(250);
setDigit(3333);
delay(250);
setDigit(4444);
delay(250);
setDigit(5555);
delay(250);
setDigit(6666);
delay(250);
setDigit(7777);
delay(250);
setDigit(8888);
delay(250);
setDigit(9999);
delay(250);
setDigit(0000);
delay(250);
digitalWrite(HRS_LED, LOW);
digitalWrite(MIN_LED, LOW);
digitalWrite(MONTH_LED, LOW);
digitalWrite(DAY_LED, LOW);
digitalWrite(YEAR_LED, LOW);
}
void loop() {
getLocalTime(&timeinfo);
if (prevMinutes != timeinfo.tm_min) { // Display Clocl for a couple of cycles every minute
turnOnClock = 0;
prevMinutes = timeinfo.tm_min;
}
if (millis() > requestDueTime) { // Update clock data every 2 seconds
updateData = 1;
requestDueTime = millis() + UPDATERATE;
}
if (updateData == 1) {
switch (displayData++) {
case 1:
if (turnOnClock <= (CLOCKCYCLES)) {
turnOnClock++;
digitalWrite(ENABLE_PIN, LOW);
Serial.print("Clock cycle: ");
Serial.println(turnOnClock);
}
if (turnOnClock > (CLOCKCYCLES) ) {
digitalWrite(ENABLE_PIN, HIGH);
Serial.println("Display Power off!");
}
digitalWrite(YEAR_LED, LOW);
digitalWrite(HRS_LED, HIGH);
setDigit(timeinfo.tm_hour);
Serial.print(" Hour: ");
Serial.print(timeinfo.tm_hour);
break;
case 2:
digitalWrite(HRS_LED, LOW);
digitalWrite(MIN_LED, HIGH);
setDigit(timeinfo.tm_min);
Serial.print(" Minute: ");
Serial.print(timeinfo.tm_min);
break;
case 3:
digitalWrite(MIN_LED, LOW);
digitalWrite(MONTH_LED, HIGH);
setDigit(timeinfo.tm_mon + 1);
Serial.print(" Month: ");
Serial.print(timeinfo.tm_mon + 1);
break;
case 4:
digitalWrite(MONTH_LED, LOW);
digitalWrite(DAY_LED, HIGH);
setDigit(timeinfo.tm_mday);
Serial.print(" Day: ");
Serial.print(timeinfo.tm_mday);
break;
case 5:
digitalWrite(DAY_LED, LOW);
digitalWrite(YEAR_LED, HIGH);
setDigit(timeinfo.tm_year + 1900);
Serial.print(" Year: ");
Serial.println(timeinfo.tm_year + 1900);
break;
default:
setDigit(9999);
break;
}
updateData = 0;
if (displayData > 5)
displayData = 1;
}
}
void setDigit(int digit) {
if (digit > 9999) digit = 0;
int thousands = digit / 1000;
int hundreds = (digit - (thousands * 1000)) / 100;
int tens = (digit - (thousands * 1000) - (hundreds * 100)) / 10;
int units = digit - (thousands * 1000) - (hundreds * 100) - (tens * 10);
digitalWrite(LATCH_PIN, HIGH);
for (int i = 0; i < 32; i++) {
digitalWrite(CLOCK_PIN, LOW);
digitalWrite(SERIAL_PIN, numberThousands[thousands][i] | numberHundreds[hundreds][i] | numberTens[tens][i] | numberUnits[units][i]);
digitalWrite(CLOCK_PIN, HIGH);
}
digitalWrite(LATCH_PIN, LOW);
}
Schematic and Layout
Cistercian Display Sch
CistercianSch.png
CAD-Custom parts and enclosures
Cistercian Display Main case
CDisplay Body.stl
Cistercian Display Spacer
CDisplay Spacer.stl
Cistercian Display Difusser
Difusser.stl
Sep 22,2022
1,181 views
Cistercian Display
A Cistercian display is a single digit that is capable of representing a number from 0 to 9999 with constant current LEDs.
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Published: Sep 22,2022
Download Gerber file 1
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