E-Kart Data Recorder

1 year ago 1405
  • Description
  • Documents
  • BOM
  • Attachments
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Description

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.

Documents

Schematic

Cart Schematic

PCB

BOM

ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted Digi-Key nameAlias Adafruit Sparkfun LCSC
1 LM2576HV-5 U1 TO-220 1 LM2576HVT-5.0/NOPB Texas Instruments Digi-Key Yes LM2576HVT-5.0/NOPB-ND
2 100uF C1 100UF 1 ESH107M063AH9AA KEMET Digi-Key Yes 399-15685-ND Value(F)
3 1000uF C2 1000UF 1 108CKE063M Illinois Capacitor Digi-Key Yes 1572-1055-ND Value(F)
4 100uH L1 INDUCTOR 1 SH50C-3.0-100 Amgis, LLC Digi-Key Yes TE2156-ND Value(H)
5 MBR0520LT1G D1 SOD-128 1 DB2460600L Panasonic Electronic Components Digi-Key DB2460600LCT-ND
6 20pF C3,C4 20PF CERAMIC CAPACITOR 2 S200K25SL0N63L6R Vishay BC Components Digi-Key Yes 1265PH-ND Value(F)
7 10k R1,R2,R4,R3 1/2W RESISTOR 4 CF12JT10K0 Stackpole Electronics Inc. Digi-Key Yes CF12JT10K0CT-ND Value(Ω)
8 16Mhz Crystal X1 16MHZ CRYSTAL 1 ATS16B CTS-Frequency Controls Digi-Key Yes CTX1085-ND
9 ARDUINO_R3_SHIELD J1 UNO_R3_SHIELD 1 1141 Digi-Key Yes 1528-1044-ND
10 HT16K33 Breakout U2,U3,U4 HT16K33 BREAKOUT BOARD 3 HT16K33 Adafruit 1427
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 7-Segment Display - 20mm (Red) Sparkfun 11405
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 7-Segment Display - 20mm (Yellow) Sparkfun 11406
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 7-Segment Display - 20mm (Green) Sparkfun 11407
14 Indicator Relay RELAY2 RELAY-HF_14 1 HF7520-012-HSTP HF LCSC C53788
15 220 - 560 ohm R5,R1 AXIAL-0.3 2 Value(Ω)
16 LED-5MM LED1 LED-3MM/2.54 1 204-10UYC/S530-A3 EVERLIGHT LCSC
17 1N4004 DIODE2,DIODE1 DO35-10 2
18 220k R6 AXIAL-0.3 1 Value(Ω)
19 20k R7 AXIAL-0.3 1 Value(Ω)
20 12V B1,B2,B3,B4 BATTERY-1 4 BS-2-1 Q&J LCSC C70376
21 Main Contactor RELAY1 RELAY-HF_14 1 HF7520-012-HSTP HF LCSC C53788
22 250A, 48V FUSE1 FUSE-6.10X2.70 1 0452003.MRL Littelfuse LCSC C99550
23 5A, 48V FUSE2 FUSE-6.10X2.70 1 0452003.MRL Littelfuse LCSC C99550
24 5K THROTTLE RES-ADJ_3386P 1 Value(Ω)
25 470 ohm 10W 48V PRE-CHARGE AXIAL-0.3 1 Value(Ω)
26 Key-Switch KSI SPST-2 1
27 Run-Switch E-STOP NONE 1
28 PEM Box U1 NONE 1 New SchematicLib
29 Series Motor M1 2PIN 1
30 SR-48300 U4 NONE 1 Alltrax
31 Data Recorder U2 NONE 1 Ccope19
32 1N4004 DIODE2 DO-41 1
33 Foot-Switch THROT NONE 1

Attachments

Filename Download
oshw_explained.PNG
Budget & BOM.PNG
PCB_front.PNG
PCB_back.PNG

Members

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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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