Adafruit_mfGFX custom font need help

Firmware Libraries
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@peekay123, is there any updated doc or example on how to config PWM duty cycle as you mention above? By controlling a transistor, I will be able only to turn on or off the LED. I am thinking to test out with a PWM duty cycle to see if I can control the voltage of an output pin that might do the trick.

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@sheng, controlling the on/off duty cycle of a LED through a transistor WILL control its brightness. LEDs are current devices and using PWM changes the average current to the LED, thus controlling its brightness. Driving the LEDs of the display canā€™t be done directly from a GPIO pin since it can only supply a max of 20ma. Using a transistor will allow for more current (50-100ma) to drive the backlight LEDs.

The mod you need to make for the space char width is the first entry of the descriptor table for that character (space).

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15 posts were split to a new topic: What display type to use (LCD, TFT, OLED, eInk, ā€¦)

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@peekay123 and @ScruffR, thank you for the information. @peekay123, sorry about going off the topic. If I have more question I will create a new topic. Thanks again.

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@peekay123, by any chance, do you have a seven segment font or instruction on how to generate it? I been looking at the dot factory but I was not able to find it there. I am trying to generate size for 18, 26, 72. I am trying to test out which font looks better on tft screen. Any advice will be grateful.

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@RWB may have something to contribute (?) The trick is to find a True Type font that you can convert.

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@peekay123, I was reading adafruit gfx font guild on adding new fonts. It suggest a tool call fontconvert on the Adding New Fonts section that could convert true type vector fonts to a .h font file that work with Adafruit_GFX. But I was thinking, what modification do I need to make it work on Adafruit_mfGFX?

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@sheng, Adafruitā€™s tool only runs on Linux, is poorly documented and is not compatible with mfGFX font data structures. If it worked on Windows, I would have ported the new GFX library a long time ago!

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I found all my fonts on these websites and used Dot Factory to convert to .H data files.

https://www.myfonts.com

http://www.dafont.com

You can try to download the Dot factory from this link http://www.eran.io/the-dot-factory-an-lcd-font-and-image-generator/

It downloaded and installed just fine for me.

If your using color TFT LCD Screens considering using the 4D systems displays because their PC programming software makes it a breeze to add custom fonts, images, and touch screen interfaces.

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@RWB, How did you import the fonts into Dot Factory? I am using Dot Factory v.0.1.4 but I donā€™t see an option to import new font. On the Input section, I only see Text and Image but the Text option does not allow me to pick the location of new font.

@peekay123, Thank you for the info, you save me from bang my head trying to figure the Adafruitā€™s tool and porting.

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@RWB, LOL I solve my question. I didnt know I can install ttf. After installing the new font, I can see it in Dot Factory. :slight_smile:

@peekay123 and @RWB Thanks for the help

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