GPS Clock

youmagine

Learn how to build a super accurate Arduino GPS clock with this basic description and sketch here: learn.adafruit.com/arduino-clock/software?view=all. I took it to the next level by adding a charger, Lipo battery, on/off switch, and a touch toggle switch. The display is bright enough to be visible through the printed enclosure, so get creative with different colors for the outer shell. Make sure to sand the contact areas on the inner part so that the shell slips smoothly over it. I printed this in PETG for dimensional accuracy, but PLA should work just fine too. The shell prints without support, so add a brim for better adhesion. Powering on and off is wired to GND and EN on the powerboost board. The toggle switch powers both the Metro mini and display together - simply powering on/off the display alone won't work, but they'll turn on immediately when powered together. GPS stays powered as long as the Power boost charger is on. I added a Lipo battery so you can take this GPS clock anywhere, even indoors where GPS signals might be weak. The display draws a fair amount of current, so the lipo lasts about 36 to 48 hours on a full charge. Luckily, I had an antenna cable lying around - but it turns out it's not necessary. Adafruit products used in this project include: Adafruit 0.56" 4-Digit 7-Segment Display w/I2C Adafruit Metro Mini 328 Adafruit Ultimate GPS Breakout PowerBoost 1000 Charger Standalone Toggle Capacitive Touch Sensor Breakout - AT42QT1012 Lithium Ion Cylindrical Battery - 3.7v 2200mAh 5.85x8mm Latching Type Miniature DPDT PushButton Switch - Flat Head