my recent reads..

LEAP#365 Driving a Nokia 5110 LCD with the Adafruit library

I’ve been having SPI conflicts with other libraries I’ve used for controlling the Nokia 5110 LCD, so time to pull out the big guns - the wonderful Adafruit library set which includes a PCD8544 module.

I started with a few tests of the hardware and software SPI modes.

As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image


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LEAP#364 Classic Nokia Ringtone

For obscure reasons, I wanted a version of the classic Nokia ringtone on an Arduino. So… I transcribed the score in Guitar Pro and tested it in a little sketch.

As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image

Here’s a quick demo:


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LEAP#363 BINCO fidget counter

The BINCO a binary counter that can be configured to count up or down. It uses Snaptron domes as buttons (on, slow/fast a,d rest). The heart of the counter is a 555 timer driving a 74HC4020D 14-bit Binary Counter from which 11 taps drive some nice reverse-mount LEDs.

As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image


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LEAP#362 H-83A 12 song music chip

The H-83A is yet another music chip, this time programmed with 12 tunes. I haven’t figured out all the songs, but they sound like classic Chinese folk tunes.

This chip requires very minimal external components (resistor, switch and power), but volume is decent in all it’s 8-bit wonder!

As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image


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