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I decided to use Arduino to verify the heart rate and blood oxygen collection function of MAX30100. With STONE TFT LCD screen for monitoring blood pressure.Functional assignments

Before starting this project, I thought about some simple features:

•  Heart rate data and blood oxygen data were collected

•  Heart rate and blood oxygen data are displayed through an LCD screen


These are the only two features, but if we want to implement it, we need to do more thinking:

•  What master MCU is used?

•  What kind of LCD display?


As we mentioned earlier, we use Arduino for the MCU, but this is an LCD Arduino project, so we need to choose the appropriate LCD display module. I plan to use the LCD display screen with a serial port. I have a STONE STVI070WT-01 displayer here, but if Arduino needs to communicate with it, MAX3232 is needed to do the level conversion.

Then the basic electronic materials are determined as follows:

1. Arduino Mini Pro development board

2. MAX30100 heart rate and blood oxygen sensor module

3. STONE STVI070WT-01 LCD serial port display module

4. MAX3232 module

Article Source :

  about 6 days ago

Digambar Sharma


This project is made of Arduino NANO, MAX7219 IC, DS3231 RTC module, 74HC04 IC, 16x2 LCD i2C display, TSOP 2818 IR receiver, IR remote, buzzer, LDR, DHT11 temperature sensor, 60 3mm blue LEDs, 130 3mm RG LEDs, LM7805, 2x( 100uF and 0.1uF ).The main features of this project is to display and control the following stuffs --1. Date 2. Days of week3. Time4. Temperature5. Humidity6. Set alarm7. Intensity8. Colour9. Tick-Tick animation

  about 8 days ago

Noob 7300

Undefined Job

I recently bought STONE's new product and got familiar with it by making a fun and simple mini-game.

Materials required for the experiment

Arduino UNO

Stone STWI070WT-01 tft lcd display

The system principle

Specify the first tap on the screen must be O, the second tap on the screen is X, has been doing this cycle. Set 8 arrays to store the number of O and X in each row, column and diagonal of each grid, as long as there are three of the same mark is the victory, then there will be a flashing red box to prove the victory of the row, column or diagonal, and then tap reset to start the game again.

  about 26 days ago

Noob 7300

Undefined Job

Some time ago, I found a heart rate sensor module MAX30100. This module can collect the blood oxygen and heart rate data of users, which is also simple and convenient to use. According to the data, I found that there are libraries of MAX30100 in the Arduino library files. That is to say, if I use the communication between Arduino and MAX30100, I can directly call the Arduino library files without having to rewrite the driver files. This is a good thing, so I bought the module of MAX30100. I decided to use Arduino to verify the heart rate and blood oxygen collection function of MAX30100. With STONE TFT LCD screen for monitoring blood pressure.

  about 28 days ago

Muhammad Akoodi

Undefined Job

This project uses a potentiometer in a voltage divider setup to send an analog voltage to the arduino, which is mapped to a digital pwm value sent to the LED.

  about 2 months ago

John Bruh

CAD designer

Drawing bitmap images (.BMP format) on ST7735 TFT display is quite easy because they are uncompressed images unlike JPEG images (.JPG format). This post shows how to draw bitmap images on the ST7735 TFT using Arduino UNO board where the Arduino loads the BMP images from SD card and print them on the display. The ST7735 TFT is a color display that uses SPI protocol, it has a resolution of 128×160 pixel. This display works with 3.3V only.

  about 2 months ago


Electronic Engineer and YouTuber

I want to power on my microcontroller for a short time, do a process and then go back to sleep where it consumes 0 apms of current. I’ve done something like that with the ultra-low power mode a few months ago on a different project, but even so, in that mode I was still consuming around 90uA. So, if I were to use a battery, after a year or so, the battery would get empty. I want to completely power OFF the system after the process is done and power up again when a new input is detected, for example I detect that somebody opened the door with a vibration sensor. For that I will use a latch circuit and that’s what I want to show you today. A circuit that enables power with a push of a button, and then, could be turned off by the microcontroller itself. I will show you step by step how this circuit works and how to implement it, and of course, see the results in power consumption.

  about 2 months ago

Rick Sanchez

Electrical engineer

This is a simple latch circuit. Press the button once and it will turn on the output. Press the button again, and it will turn off the output. Instead of a push button, you can use a vibration sensor for example, and turn on your devices with the latch each time you sense a vibration. See below the schematic and values for the circuit.

  about 2 months ago


Electronic Engineer and YouTuber

This is my first version of a smart-glasses multimeter. Is not the most unique and best look design, but this is yet a first version. I’m pretty sure I will improve it in the future. Anyway, inside the 3D printed case, we have a custom-made PCB that I will show you later, a Bluetooth module, a small LiPo battery and a very small OLED display. The difficult part was to get the text from the OLED display to focus near the eye, and for that the solution was to place the screen at the far back of the case, then use a lens to make the text bigger and then project it towards the eye. So, I will show you the PCB that I’ve made, the problems I had, show you what components we need and how to solder each one and in which order, then we make some tests and show you some results. This project is made to work together with an old project of the Arduino multimeter. If you remember, that project had a Bluetooth output, so all I need to do is to send the Bluetooth data from that multimeter to my glasses and show the value on the tiny OLED screen. I’ve used a small MSOFET connected to the Bluetooth module, so we could turn the module on and off whenever we want.

  about 3 months ago

Nicholas Constnatinou

Robotics Teacher


I please want your help regarding a problem I’m encountering.

Description:I am working on a project to control my car from the phone. I wrote an android project for that to monitor every sensor I installed on the Arduino. I create the app on the Android Studio am using fragments to change between the app (Menu - Settings - Tools). Every time I switch between them the main menu stays on top of the others. I need your help.

I need someone who work with android studio

Additional information:The app is written in Java. i used the preset fragment layout that the studio gives and add mine in there.

Thank you so much in advance for your help!

  about 3 months ago

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