How to design a Data Logger Circuit?
A Data Logger Circuit is part of both Ground Low-Voltage Systems as well as High-Voltage Systems. Its purpose it to provide easy data logging and analysis of the car battery’s current and voltage parameters as well as vehicle dynamics.
Components used:
1. Resistors
2. Voltage Regulator
3. Headers
4. Optocoupler (PC817)
5. GPS Module
6. ESP-8266 Module
7. SD Card Module
8. Microcontroller board (Arduino Nano)
9. LED
10. Transistor (TIP122)
11. Supply Voltage: 12VDC
Circuit Working
It comprises of 1 opto-coupler that isolates the Low-Voltage Systems from the High-Voltage Systems. The optocoupler resides between two microcontroller boards namely Arduino Nanos with the gap of 17.5mm. The data from the High-Voltage Systems is received by the microcontroller on the High-Voltage side; this data is send to the microcontroller on the Low-Voltage end through isolation provided by the optocoupler. The microcontroller, in turn sends the data to the SD Card Module attached to the data logger circuit board. The data logger circuit board also contains ESP-8266 module and GPS module. The GPS module is to note the vehicle positioning and dynamics where as ESP-8266 is used to send the vehicle dynamic’s data to cloud server.
Ordering PCB
Now we have got the PCB design and it’s time to order the PCBs.
For that, you just have to go to JLCPCB.com, and click on the “QUOTE NOW” button.
JLCPCB has sponsored this project.
JLCPCB (Shenzhen JLC Electronics Co., Ltd.) is the largest PCB prototype enterprise in China and a high-tech manufacturer specializing in quick PCB prototype and small-batch PCB production. You can order a minimum of 5 PCBs for just $2.
1. To get the PCB manufactured, extract the Gerber file from the PCB design software.
2. Upload the Gerber files on the JLCPCB website.
3. After uploading the zip file, you’ll see a success message at the bottom if the file is successfully uploaded.
4. You can review the PCB in the Gerber viewer to make sure everything is good.
5. You can view both the top and bottom of the PCB.
6. After making sure our PCB looks good, we can now place the order at a reasonable price.
7. You can order 5 PCBs for just $2 but if it’s your 1st order then you can get 10 PCBs for $2.
8. To place the order, click on the “SAVE TO CART” button.
My PCBs took 2 days to get manufactured and arrived within a week using the DHL delivery option. PCBs were well packed, and the quality was really good.