An interesting take on the geocaching hobby -- mining a bunch of meters and dials from various hardware to offer some tweak and float to the display of the data. via hackaday.
...The meter on the left shows the angle to the destination. The other shows how near you are (log-scale and the higher the "measurement", the closer you are). There's a beeper that beeps more frequent the closer you get. There's a rotary encoder with which you can select to show your current location in lattitude/longitude, set a new target. The black part on the rotary encoder comes from a strange metal device I bought in France by the way....
- The interval between beeps get smaller when you approach the destination.
- The adafruit recharger is really meant for solar panels but it works with regular power sources as well.
- The switch is for switching between GPS and regular serial communication so that I can easily switch between GPS source to the UART or flashing the Arduino.
- The big switch on the left is for on/off of the beeper and the one on the right for power.
- In the plastic wrapper is a power booster to increase of 3.7V to the required 5V. The battery is 6600mAh.On the print you PCB you see that I kind of overestimated the number of required GND and VCC pins.
- The meters are current meters and with the appropriate resistor you can set them with regular PWM. I read somewhere that you should add a capacitor to meters.
- You can also see that I'm a big fan of (Patex-) hot glue. The wooden board was designed with inkscape and cut with the lasercutter at RevSpace.
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