Space Invaders Clock

thingiverse

Inspired by GeckoDiode (Instructables) and smooth_jamie (Instructables), I took on the challenge of building my own version. The case design is entirely original, crafted to work seamlessly with a MAX7219 LED dot matrix module. The Arduino sketch builds upon smooth_jamie's original work, while I enhanced the RTC logic and corrected various issues with minutes and animations that weren't displaying correctly. Furthermore, the Alien Space Ship now completes the cast of characters. LED Matrix Editor is an excellent tool for creating and troubleshooting matrix displays. PARTS: Arduino Nano (Amazon) MAX7219 LED Matrix Display (Red and Green LEDs) (Amazon - Green) (Amazon - Red) DS1307 Tiny RTC Module * REQUIRES PCB MODIFICATION * (Amazon) CR2032 Lithium Battery 8 ohm speaker (Amazon) 1K ohm Resistor SPST Momentary Push Button (Amazon) SB400 Solderable PC BreadBoard (Amazon) Micro USB Interface Power Adapter Board 5V Breakout Module (Amazon) 5 VDC Source - I used a USB power supply for a cell phone #4-20 X 5/8" Plastic Screws, QTY 4 (Amazon) Arduino Sketch - Included in Thing Files SpaceInvadersClockRepRapTodd03152020.pdf Note: The Tiny RTC module requires R4, R5, R6, and D1 to be removed from the PCB. After removing the resistor, R6 needs a wire to complete the circuit. Now that the faulty recharging circuit is disabled, use a standard lithium 2032 battery to keep time when power is removed. Arduino libraries required: [MaxMatrix] (interfaces with the series of 8X8 LED displays) [JeeLabs RTClib] (Real Time Clock - DS1307 Tiny RTC Module) UPDATE: 03152020 - Fixed sketch to display midnight correctly. Updated line #1205 - case 12: case 24: to case 12: case 0:, now correctly evaluates time at midnight. Thing file updated with code fix. [1]: https://www.instructables.com/id/Space-Invaders-Desktop-Clock/ [2]: https://www.instructables.com/id/Space-Invaders-Clock-on-a-Budget/ [3]: https://xantorohara.github.io/led-matrix-editor/ [4]: https://www.amazon.com/dp/B0713XK923/ref=cm_sw_em_r_mt_dp_U_kRDpDbA0P0QSQ [5]: https://www.amazon.com/dp/B07FNHKD5W/ref=cm_sw_em_r_mt_dp_U_URDpDb9D12WSD [6]: https://www.amazon.com/dp/B01EJ1AFW8/ref=cm_sw_em_r_mt_dp_U_WSDpDbPNDEVHA [7]: https://www.amazon.com/dp/B079P7DWTB/ref=cm_sw_em_r_mt_dp_U_GUDpDbJ118R6C [8]: https://www.amazon.com/dp/B0177ABRQ6/ref=cm_sw_em_r_mt_dp_U_wVDpDb7DPBM2Z [9]: https://www.amazon.com/dp/B07QJ9JS4Y/ref=cm_sw_em_r_mt_dp_U_xWDpDb1F77EHA [10]: https://www.amazon.com/dp/B01MR9GF87/ref=cm_sw_em_r_mt_dp_U_.WDpDb4ARFFFZ [11]: https://www.amazon.com/dp/B07B5ZDLJY/ref=cm_sw_em_r_mt_dp_U_EMDpDbYQT9736 [12]: https://www.amazon.com/dp/B00GDYV7EA/ref=cm_sw_em_r_mt_dp_U_z-DpDbMJ7CF43 [13]: https://github.com/riyas-org/max7219 [14]: https://git.jeelabs.org/jcw/rtclib