MonkeyAltimeter by K.C. Budd

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The MonkeyAltimeter is a pressure sensor altimeter utilizing the Bosch BMP085 or BMP180 I2C pressure sensor, an LCD display, and a simple user interface. The pressure sensor provides altitude information at +/­ 3 feet from ­-2000 feet MSL to 30,080 MSL. MonkeyAltimeter provides the following functions by way of a simple interface: ● Sea­level pressure adjustment (Kollsman Window) ● Altitude reach notification ● Altitude deviation alert ● Vertical Speed Indicator ● Cabin Temperature Instructions Parts list: 3.3V / 8MHz Arduino Pro Mini BMP180 pressure sensor 16x2 (TWI 1602) LCD panel with I2C interface (lots on eBay!) 8mm red/amber/green LED (e.g. WP799SURKMGKW) Rotary Bourns Encoder switch (e.g. PEC11R-4215F-S0024) Slide switch (power) Optional: Integrated TP4056 USB lithium battery charger ~300mAh 1-cell (1S) lithium battery WARNING: Check charge output current on battery charger. Some are preset at 1A which can cause fires with smaller 1S batteries. The common one on eBay requires a SMD resistor to be replaced to dial back the current. (http://www.electrodragon.com/w/TP4056_Lithium_Battery_Charging_Board_1A) Optionally, this one from SparkFun is easily selectable (but doesn't readily fit the unit): https://www.sparkfun.com/products/12711?_ga=1.239961930.878323687.1435504106 Source code: (Requires Arduino IDE 1.6.5+) https://github.com/phreakmonkey/MonkeyAltimeter Notes: The SDA and SCL lines from the sensors go to pins A4 and A5, respectively. (Not labeled on schematic…