E-Kart Data Recorder

2 years ago 1968
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This is a small pcb that is designed to be used on an electric go-kart to display a stopwatch, motor RPMs, and cart speed as well as record this data on an SD card with a time stamp for analysis. The project is Arduino based and is ran off of 7-59 VDC or directly from a 5V source through any of the 5V or VIN pins on the data logger shield (this is not a protected input). It is designed to have wires soldered in the spots for the power input, the power switch, the start & stop buttons, and the hall effect sensor that goes to the axle. The device is calibrated through variables for wheel diameter and gear ratio from the motor to the axle. To upload the sketch use the ICSP (In Circuit Serial Programmer) headers found on the data logger shield.

Source Code: https://github.com/Ccope19/E-Kart-Data-Recorder

Will include a link to an instructable w/ assembly and code... this is a full project you can copy.



Cart Schematic



ID Name Designator Footprint Quantity
1 LM2576HV-5 U1 TO-220 1
2 100uF C1 100UF 1
3 1000uF C2 1000UF 1
4 100uH L1 INDUCTOR 1
5 MBR0520LT1G D1 SOD-128 1
7 10k R1,R2,R4,R3 1/2W RESISTOR 4
8 16Mhz Crystal X1 16MHZ CRYSTAL 1
10 HT16K33 Breakout U2,U3,U4 HT16K33 BREAKOUT BOARD 3
11 0.56 Inch 4 Digit Common Cathode 7 Segment Display (w/ decimal, w/o colon) DS1 20.4MM COMMON CATHODE 7-SEGMENT DISPLAY 1
12 0.56 Inch 4 Digit Common Cathode 7 Segment Display (w/ decimal, w/o colon) DS2 20.4MM COMMON CATHODE 7-SEGMENT DISPLAY 1
13 0.56 Inch 4 Digit Common Cathode 7 Segment Display (w/ decimal, w/o colon) DS3 20.4MM COMMON CATHODE 7-SEGMENT DISPLAY 1
14 Indicator Relay RELAY2 RELAY-HF_14 1
15 220 - 560 ohm R5,R1 AXIAL-0.3 2
16 LED-5MM LED1 LED-3MM/2.54 1
17 1N4004 DIODE2,DIODE1 DO35-10 2
18 220k R6 AXIAL-0.3 1
19 20k R7 AXIAL-0.3 1
20 12V B1,B2,B3,B4 BATTERY-1 4
21 Main Contactor RELAY1 RELAY-HF_14 1
22 250A, 48V FUSE1 FUSE-6.10X2.70 1
23 5A, 48V FUSE2 FUSE-6.10X2.70 1
25 470 ohm 10W 48V PRE-CHARGE AXIAL-0.3 1
26 Key-Switch KSI SPST-2 1
27 Run-Switch E-STOP NONE 1
28 PEM Box U1 NONE 1
29 Series Motor M1 2PIN 1
30 SR-48300 U4 NONE 1
31 Data Recorder U2 NONE 1
32 1N4004 DIODE2 DO-41 1
33 Foot-Switch THROT NONE 1


Filename Download
Budget & BOM.PNG


The owner does not allow comments in this project now

Comments (1)

Ccope19 Reply

A 28 position (2x14) DIP Socket was put in the ATMEGA328P spot so that it is removable.  A CR1220 battery is needed for the RTC module and two Neodymium Magnets (0.375" Dia x 0.063" H) were ordered to put on the axle for the Hall Effect Sensor to function.  One is possible but two allows for more accuracy and faster code.  All of these were ordered off of Digi-Key with the other products.  An SD card is also required but I used one that was laying around.  A new one is typically around $10 for a 4 GB to 8GB card.

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