License

Public Domain

Tags
Recommend Projects

OBC-VW

9 months ago 213
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

See on Github

OBC_VW

Author: averaldofh

What's this?

It is just an atempt to get an on-board computer in an '69 VW Beetle.

What this thing do? (or should..)

It's going to simply show the speed, odometer, 2 parcial odometers, oil temperature, battery voltage and fuel level.

How it works?

Speed: There's a hall effect sensor attached to the wheel hub, as well as 4 magnets attached to the wheels. These will give us the RPM of the wheels, then we can get the speed of the car.

Odometer: With speed and time we can sum our mileage very easily and store in non-volatile memory.

Oil Temperature: Still figuring out how i will attach an NTC to monitor oil temperature. But the NTC uses a Steinhart-Hart equation.

Fuel level: Just as simple as a potentiometer and a buoy.

Battery Level: Simplest thing on the whole project.

this sketch for testing purposes, is runing ok on a ESP32 with built-in OLED screen. still under development.

SPLASH_SCREENMAIN_SCREENSTATS_SCREENSTATS_SCREENOILSTATS_SCREENBAT

Special Thanks

Thanks to youtube.com/user/interlinkknight for his awesome piece of code, regarding RPM counting.

Documents

Circuit

PCB_v1

cb2

final

final copy

PCB_2020-11-20_21-06-10

BOM

ID Name Designator Footprint Quantity
1 56k R1 R_AXIAL-0.4 1
2 10k R2,R7 R_AXIAL-0.4 2
3 100k R3 R_AXIAL-0.4 1
4 33k R4 R_AXIAL-0.4 1
5 22k R5 R_AXIAL-0.4 1
6 AMS1117-3.3 U2 SOT-223_L6.5-W3.5-P2.30-LS7.0-BR 1
7 10K R6 TRIM_POT_PTH 1
8 ESP32-WROOM-32U U1 WIFIM-SMD_ESP-WROOM-32 1
9 10k R8 R0805 1
10 1k R10 R0805 1
11 100uF C1 CAP-TH_BD6.3-P2.50-D1.0-FD 1
12 22 R9 R_AXIAL-0.4 1
13 PRG_EN J2 HDR-M-2.54_1X2 1
14 Fuel J8 HDR-M-2.54_1X2 1
15 Hall_con J7 HDR-M-2.54_1X3 1
16 HALL J9 HDR-M-2.54_1X3 1
17 Encoder J1 HDR-M-2.54_1X5 1
18 Bat/Ign/Thm J6 HDR-M-2.54_1X5 1
19 0.1u C2,C3 RAD-0.1 2
20 1N4728A ZD1,ZD2 DO-41_BD2.8-L4.2-P8.00-D0.7-FD 2
21 OLED J5 HDR-M-2.54_1X4 1
22 Programmer J3 HDR-M-2.54_1X4 1
23 LM393 U3 DIP8 1

Attachments

None

Members

Success
The owner does not allow comments in this project now

Comments (0)

goToTop
你现在访问的是EasyEDA海外版,使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程,下载后在https://lceda.cn/editor 打开保存即可。
有问题联系QQ 3001956291 不再提醒
svg-battery svg-battery-wifi svg-books svg-more svg-paste svg-pencil svg-plant svg-ruler svg-share svg-user svg-logo-cn svg-double-arrow
We use cookies to offer you a better experience. Detailed information on the use of cookies on this website is provided in our Privacy Policy. By using this site, you consent to the use of our cookies.