Chess clock

thingiverse

###The chessboard --- The awesome wobbly chessboard and its belonging pieces are designed by [MikeyB](https://www.thingiverse.com/thing:53604) I did however alter the base of the pieces to be a bit more hollow, and I removed the last couple of layers. This way the pieces always stand upright and have a balanced pull-force as I installed magnets In the bases. I've included the new base file. ###The chess clock --- The watch contains the following electronic components: * 2 x [10kΩ potentiometer + cap](https://www.amazon.com/-/de/dp/B07QMR2L2B/ref=sr_1_11?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=2D3SVLVJPYKRW&dchild=1&keywords=potentiometer+10k&qid=1615996555&sprefix=potentiometer+10%2Caps%2C253&sr=8-11) * 2 x [TM1637 4 digit 7 segment display (with colon)](https://www.amazon.com/-/de/dp/B01DKISMXK/ref=sr_1_2?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=1C8TNEYDXWFAZ&dchild=1&keywords=tm1637&qid=1615996614&sprefix=tm1637%2Caps%2C239&sr=8-2) * 3 x [(6x6mm) tactile push button](https://www.amazon.com/-/de/dp/B0796QHL5Z/ref=sr_1_1?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=6x6x6+button&qid=1615996650&sr=8-1) * 1 x [Piezo buzzer](https://www.amazon.com/-/de/dp/B07NK8MGL9/ref=sr_1_4?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=piezo+buzzer&qid=1615996686&sr=8-4) * 1 x [on/off pressure switch](https://www.amazon.de/-/en/DECARETA-Toggle-Switch-Pressure-Rocker/dp/B07PVZ18ZP/ref=sr_1_11?dchild=1&keywords=on+off+schalter&qid=1615996784&sr=8-11) * 1 x 9-volt battery * 1 x Arduino Nano * 4 x m2 bolt (length between 1-2 cm) **Note** that the links are only meant to be a reference to the components I used (sizing and looks). These components can of course be bought a lot cheaper if one cares to look. In general, the design is quite size-flexible since it's just a housing, only really the button needs the mentioned dimension. Thankfully these components are all cheap and to me considered essentials when tinkering with microcontrollers. It makes for a great starter project. The buttons on the clock are made as bolts specifically to house 6x6mm standard push buttons. The bolt containing the button can be put through the case, and secured with the nut from the inside. The legs of the button poke through the bottom of the bolt so the legs can be soldered onto. A really low layer height like 0.12mm made the bolt and nut screw together much smoother. An extension is placed on top of the button so it can be pushed. This extension is secured to the button with a really really small dabble of locktite. If too much glue is applied the button will lock. I also found it hard to solder on the button legs without burning through the plastic. So instead of placing solder on the leg, I pre-placed solder on the wire which insured a much more brief operation. There are small ledges at the end of the clock to help secure an Arduino Nano. The displays are pressure-fitted using the frame. I did use some glue to avoid accidentally pushing the displays into the case when playing. My displays had angled connector pins which I replaced with straight ones in order to fit the displays in the housing. One of my displays stopped working after this so be a bit careful removing the pins. #####An electrical diagram can be found [here](https://imgur.com/a/2JLdeJ9) #####The code I used can be found [here](https://drive.google.com/drive/folders/1NTjQujdIAx52gEXAjSFONQUlNtMXdJ5P?usp=sharing) #####A demonstration of the watch can be found [here](https://www.youtube.com/watch?v=hXCdCEyiNIA) Keep in mind I'm, not an engineer so be kind to my code and wiring.