Light-Up Poker Chip

Exciting project by Alex Wulff on Hackster.io:

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Light-Up Poker Chip

This whole circuit is the same size as a regular poker chip, but with an added surprise: lights!

Spice up your poker games with these cool blinking chips. They can be programmed on the fly to have a certain number of the LEDs illuminated to indicate value, or you can have the lights blink in a cool pattern. They make great playing chips for championships or great prizes to hand out to the winners.

Video of the board in action:

AlexWulff has shared the board on OSH Park:

Light Up Poker Chip Rev. 1

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Order from OSH Park

Light-Up Poker Chip

Open Panzer Sound Card

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Open Panzer Sound Card

The Open Panzer Sound Card is a work in progress with the goal of bringing inexpensive, high quality, and open source sound functionality to RC models but especially to tanks using the Tank Control Board (TCB).

The board is actually made up of two components. First, an off-the-shelf PJRC Teensy 3.2 is used as the onboard processor. The Teensy is then plugged into a socket on our custom carrier board that adds a Micro SD card slot (max 32 GB), an additional 16 MB of flash memory, an LM48310 2.6 watt audio amplifier, and headers for external connections.

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Order from OSH Park

Resources

Open Panzer Sound Card

Wireless Terminal Over ESP8266

From debug messages to the fundamental ‘hello world’, serial communication does it all over three little wires. Now imagine being able to cut the cord to your next microcontroller project and use your phone as a VT100 terminal. This was the premise of [Ondřej Hruška]’s Wireless Terminal Project where he took an ESP8266 and added an in-browser terminal emulator which can be accessed…

via Wireless Terminal Over ESP8266 — Hackaday

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Wireless Terminal Over ESP8266

Hackaday Prize Entry: WiFi ePaper

[Frank Buss] designed an electronic version of a sticky note: a WiFi enabled, solar-powered ePaper, with magnets embedded in the casing. It’s based on the new ESP32, and the idea is that you can update it via your smart-phone or over the internet via a cloud app to show any message you want. Being an…

via Hackaday Prize Entry: WiFi ePaper — Hackaday

Hackaday Prize Entry: WiFi ePaper

Mesh networking for sensor grids

Mesh networking board by Daniel on Hackaday.io:

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Low-power mesh networking for small sensor grids

Tiny MQTT-interoperable broadcast mesh networking with simple radios

This project is a low-resource mesh networking stack and mote with battery-powered routers based on state synchronization. The target is for the stack to use less than 2kb SRAM. Nodes use low power listening and an adaptive gossip protocol to synchronize key/values pairs with each other without relying on explicit routing or per-node addressing.

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For example, a light might transmit (/lamp, {“state”:”on”}) to the mesh. Write (/lamp, {“state”:”off”}) to the mesh, and the lamp application will notice. The powerful but simple state synchronization primitive allows you to update the state of the mesh to update the world, and update the state of the world to express the same on the mesh. Trivially bridged to a private MQTT server and managed with off-the-shelf MQTT applications.

The design files and source code are available on Bitbucket:

dholth/mesh

Mesh networking for sensor grids