AEV 5 An Introduction to the AEV Motor

AEV 5 An Introduction to the AEV Motor Controller

AEV 5 • Design Goals - Results • Light Weight – 43. 5 grams w/ cables • Small Size – 1. 2 inches wide x 3. 7 inches long x 0. 625 inches high • Ability to supply 2+ amps per motor for two motors (third optional) • Parallel operation of the TB 6612 FNG motor driver • • • Easy to program • Use of the Arduino Nano w/ open source software • • • http: //arduino. cc/ http: //www. gravitech. us/arna 30 wiatp. html Extra memory to record voltage and current for a two minute run • Additional 32 k bytes of eeprom memory (24 LC 256, uses i 2 c bus) • Hall effect current sensor • 1/3 battery voltage resistor voltage divider (10 K, 10 K) allowing 11 volt cells to be read by 5 volt ADC • • • 2. 4 amps constant w/ 6. 4 amp peak (very limited) https: //www. sparkfun. com/products/9457 https: //www. sparkfun. com/products/525? http: //www. digikey. com/product-detail/en/ACS 715 LLCTR-20 A-T/620 -1230 -1 -ND/1824990 Low Cost - ~$80 (not including development cost)

AEV 5 Motor 2 controller Motor 1 controller Arduino Nano (see: http: //arduino. cc)

AEV 5 Battery connector (observe polarity, red+ !) Motor 2 cable (polarity can be changed) Wheel count sensor connection to digital pin 3, +, gnd. 180 sec. program delay override switch (gnd to pin 12)

AEV 5 • Motherboard Layout (Sensors/Memory) Voltage Divider For Battery Voltage Sense Current Sensor 32 K Byte eeprom

AEV 5 • Motherboard Layout (Pin Outs) Analog 7, +5, gnd (top pin to bottom pin in this picture) Analog 6, +5, gnd Digital 2, +5, gnd This is an available digital pin (also interrupt 0) that can be used for an additional digital sensor Digital 3, +5, gnd This is the connection header for the wheel count sensor (interrupt 1) Digital 4, +5, gnd Digital 9, +5, gnd D 4 & D 9 not available if using optional 3 rd motor

AEV 5 To 3 rd motor • Motherboard Layout (Pin Out Cont. ) Control signal breakout for optional 3 rd motor (gnd, +, D 4, D 15, D 9 – listed from bottom to top) D 14 and D 15 are analog pins A 0 and A 1 (the first six analog pins on the nano can be called as digital (14 -19)) Third motor battery power -, + Terminals 3 and 4 are only used to supply battery power to the optional third motor. These terminals are usually vacant (no cable).

AEV 5 • Motherboard Layout (Pin Out Cont. ) Terminals 7 & 8, Motor 1 (polarity not important) Terminals 5 & 6, Motor 2 (polarity not important) Terminal 2 to battery (negative, blk) Terminal 1 to battery (positive, red) Must Observe Polarity!

AEV 5 • Motherboard Layout (Pin Out Cont. ) Rx, Tx, Reset, +5 v, gnd This is for possible wireless use (access to Rx, Tx). It is also possible to put a cable w/ switch between the 3 rd pin (reset) and 5 th pin (gnd) to allow easier resets of the Arduino Nano. +5 v, blank, gnd, D 13, D 12, D 11, D 10 Allows access to the SPI comm bus (sck 13, miso 12, mosi 11, ss 10) which can be used for the addition of an SD card or any sensor requiring SPI. When not using such a device, pin 3 (gnd) and pin 5 (D 12) are connected to a switch used to override the 180 second program delay. Gnd, +5, SDA (A 4), SCL (A 5) I 2 C comm bus expansion. Allows for the use of an an i 2 c LCD/LED display or any sensor using i 2 c (eeprom uses address 80).

Check Out • Get checked out by Instructional Member BEFORE plugging in the battery!! • Blatant Disregard, Damaging, and Taking equipment will result in FULL PENALTY by: • The Ohio State University Jurisdiction Policy