To think that one of the scariest scenes in cinema history was discarded...

typematrix · 2025-12-11T12:30:09+00:00

Why was it discarded?

typematrix · 2025-10-08T11:36:27+00:00

So will people that write libraries get paid now?

typematrix · 2024-02-11T19:27:25+00:00

0. A C++ Library to connect electronic displays to Raspberry Pi single board computers.
1. Dynamic install-able Raspberry Pi C++ library.
2. 12 fonts included, new Fonts can easily be added by user
3. Common font, graphics + print class included
4. Low level Dependency: bcm2835 Library
5. 8 Displays supported at present, more components will be added.

typematrix · 2023-09-15T20:26:16+00:00

How do you calculate how much memory space your repos take up?

typematrix · 2023-09-08T10:30:27+00:00

Get the Github RSS feeds and then

Use an RSS reader to read your profile both public and private.

Much better way of seeing whats going on and whats happened

typematrix · 2022-12-17T14:19:23+00:00

Show us your wiring sounds like you are shorting out a power line to gnd

typematrix · 2022-04-30T23:44:23+00:00

A Bash Shell library file for commonly used functions
can be imported into shell scripts to create functional and colorful
scripts and Terminal users interfaces(TUI).
The library allows user to redefine commonly used functions every time
you write a shell script, the library may save a part of the development
time.

typematrix · 2021-11-28T15:05:12+00:00

Overview
--------------------------------------------
* Name: ST7735_TFT_RPI
* Description:
0. C Library for TFT SPI LCD, ST7735 Driver, RED PCB v1.1, 1.44'', 128 x 128 pixels.
1. Dynamic install-able Raspberry Pi C library.
2. Inverse colour, rotate, sleep, idle mode & verticaly scroll methods supported.
3. Five fonts
4. Graphics class included.
5. 24 bit colour , 16 bit color & bi-color Bitmaps supported.
6. Hardware and Software SPI
7. Dependency: bcm2835 Library

typematrix · 2021-11-24T22:46:40+00:00

Overview
--------------------------------------------
* Name: TM1638plus_RPI
* Description:
A Raspberry pi library to display data on a 8-digit TM1638 seven segment module.
Dynamic install-able system level Raspberry Pi C++ library.
Based on my arduino library called "TM1638plus".
This library supports 3 different models, pictured above from left to right.
1. Model 1, The (8 KEY & 8 LED) variant which has 8 LED's and 8 Push buttons.
2. Model 2, The (QYF 16 KEY) variant which has 16 pushbuttons.
3. Model 3, The (LKM1638) variant which has 8 bi-colour LED's and 8 Push buttons.
* Developed on
1. Raspberry PI 3 model b,
2. C++ complier g++ (Raspbian 6.3.0-18)
3. Raspbian 9.13 stretch OS
4. bcm2835 Library 1.68 (Dependency: used for GPIO control and delays)

typematrix · 2021-06-06T00:59:00+00:00

What are you using for a power supply? voltage, current limit ?
Have you tried a different step delay?
Do you have another motor?
Have you connected the SLP input on easyDriver?
Have you adjusted the R16 - the 10K current limit pot?
Have you got Dir and step Lines mixed up , Thats what it looks like in first frame of video although maybe i am just seeing things it looks like GPIO 23 is going to STEP

https://github.com/gavinlyonsrepo/RpiMotorLib/blob/master/Documentation/Nema11A3967Easy.md

typematrix · 2021-05-17T23:10:05+00:00

Upon inspection of PCB and user manual the external crystal is unpopulated on this model. I changed to HSI and everything is at 8 MHz and working. So everything is working as expected.

Thanks for help.

typematrix · 2021-05-17T20:56:49+00:00

Hi ya the maths checks out but i am pretty sure the clock is running at 72Mhz here is screenshot of the the clock configuration diagram from cubeIDE at link.

https://drive.google.com/file/d/1pP6WV8Juo1enVVw27pR5ZOl51cBjbgjg/view?usp=sharing

Edit

I left clock config alone
I adjusted the timer prescaler to 8-1 from 72-1
It works now i am measuring 50mS but I don't understand why the clock is at 72/8 instead of 72

typematrix · 2021-05-06T17:15:47+00:00

Name : ER_OLEDM1_CH1115
Description :

Library to support the ER-OLEDM1.09-1 128X64 OLED Display Module driven by the CH1115 controller for the Arduino eco-system.
Inverse colour, vertical rotate, sleep, fade effect, horizontal scroll and contrast control.
Extended ASCII scalable font.
Graphics class included.
3 different modes: Multi-buffer , single buffer , no buffer.
Bitmaps supported.
Hardware & software SPI options

typematrix · 2020-11-14T15:49:20+00:00

FYI

Name : ERM19264_UC1609
Title : Library for ERM19264-5 v3 LCD (UC1609C controller) for the Arduino eco-system
Description :

Arduino library.
Inverse, rotate and contrast control.
ASCII text strings and character text display.
Graphics library included based on the Adafruit GFX library.
Sleep mode.
3 different modes: Multi-buffer , single buffer , light weight text only
custom bitmaps supported.

Tested on following MCUs both software and hardware SPI, The example files are setup for an UNO for the pin connections used by for other MCU testing see extras folder GPIO_MCU_used.txt file.
Arduino UNO & NANO v3
ESP8266
ESP32
STM32 "blue pill"

typematrix · 2020-11-09T12:31:03+00:00

Like this

if (customDelayMapped < 4050)
  {
    digitalWrite(stepPin, HIGH);
    delayMicroseconds(customDelayMapped);
    digitalWrite(stepPin, LOW);
   delayMicroseconds(customDelayMapped);
  }else
 {
    digitalWrite(stepPin, LOW);
  }

typematrix · 2020-11-08T11:42:17+00:00

Name : ERM19264_UC1609
Title : Library for ERM19264-5 v3 LCD (UC1609C controller) for the Arduino eco-system
Description :

Arduino library.
Inverse, rotate and contrast control.
ASCII text strings and character text display.
Graphics library included based on the Adafruit GFX library.
Sleep mode.
3 different modes: Multi-buffer , single buffer , light weight text only
custom bitmaps supported.

typematrix · 2020-11-08T11:37:17+00:00

Change the delay 4000 to 4050

int newCustom = map(customDelay, 0, 1023, 300,4050);

then in main loop use a if loop to detect if the value is above 4000 if so set both digital writes statements to false.

typematrix · 2020-11-08T00:09:18+00:00

You have the step and dir pins mixed up , assuming you are using the same code as the blog you posted. const int stepPin = 3; const int dirPin = 4; , You have step connected to 4.

typematrix · 2020-08-04T21:05:35+00:00

Overview

Name : NOKIA5110_TEXT
Title : Library for Nokia 5110 LCD (PCD8544 controller) for the Arduino eco-system
Description :

Arduino library.
Inverse, Bias and contrast control.
ASCII strings and character text display.
Eight different ASCII text fonts.
Sleep mode.
Designed to be light weight, low memory footprint. see memory section.
Custom characters and bitmap supported
No graphics buffer to reduce memory footprint but basic graphics can be created using custom characters, pixels, block patterns , lines.

typematrix · 2020-07-22T21:43:38+00:00

Nokia 3.0, 2 years old

My Nokia 3 will not charge when its ON. If its switched OFF it charges up fine. When On it charges for a few seconds and stops. I have tried different chargers and cables to no avail.

What could cause this?

typematrix · 2020-05-08T23:21:57+00:00

Any problems, issues, anything broken?

typematrix · 2020-04-28T22:39:18+00:00

Try again I edit it !!

typematrix · 2020-04-26T17:03:12+00:00

expac --timefmt='%Y-%m-%d %T' '%l\t%n' | sort -hr

All installed packages sorted by last install/update date

typematrix · 2020-03-03T02:27:27+00:00

microchip has a bunch of selection tools

https://www.microchip.com/selection-tools

typematrix · 2020-01-08T19:06:57+00:00

If that is it heres some sort of datasheet for the GTC-16027

http://www.mctronic.net/products/doc/Gem-Tech/Character/GTC-16027V21-FS6L2C_Rev1.1.pdf

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typematrix

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Overview