back to archive
Blog Mohammed Ashad· Oct 17, 2022· 1 min read

How To Propose Your Crush Using an Oscilloscope

What if an oscilloscope could help you express your feelings? This fun electronics project demonstrates how to create heart shapes, messages, and creative waveforms on an oscilloscope screen, turning engineering skills into a unique and memorable way to propose to your crush.

How To Propose Your Crush Using an Oscilloscope
on this page7 sections

In this article, I help you propose your crush using an oscilloscope. I plan to show some messages on an Oscilloscope in the X-Y mode with the help of an ESP32 microcontroller board. Please ensure your crush likes your project skills, otherwise, this method may be a complete failure.

Components Required

  1. ESP32 microcontroller board
  2. An Oscilloscope (I am using Keysight’s EDUX1002A model DSO)

Circuit Diagram


Note: Connect both grounds of DSO channel1 and channel2 to ESP32’s any of the GND pin

Programme

arduino
#include <driver/dac.h>

/* START */
const int NUM_POINTS = 1702;
const unsigned long x_points[NUM_POINTS] = {15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,15,34,177,196,220,239,15,34,177,196,220,239,15,34,177,196,220,239,15,34,177,196,220,239,15,34,177,196,220,239,15,34,177,196,220,239,15,34,177,196,220,239,15,34,88,89,90,91,92,93,94,95,96,97,115,116,117,118,119,120,121,122,123,124,177,196,220,239,15,34,86,87,88,89,90,95,96,97,98,99,113,114,115,116,117,118,119,120,121,122,123,124,125,126,177,196,220,239,15,34,84,85,86,87,98,99,100,101,111,112,113,124,125,126,127,128,177,196,220,239,15,34,83,84,85,99,100,101,102,110,111,112,126,127,128,129,177,196,220,239,15,34,82,83,84,100,101,102,103,109,110,111,127,128,129,130,177,196,220,239,15,34,81,82,83,102,103,104,108,109,110,128,129,130,177,196,220,239,15,34,81,82,103,104,105,108,109,129,130,131,177,196,220,239,15,34,80,81,104,105,107,108,130,131,132,177,196,220,239,15,34,80,81,105,106,107,108,130,131,132,177,196,220,239,15,34,80,106,107,131,132,177,196,220,239,15,34,79,80,131,132,133,177,196,220,239,15,34,79,80,132,133,177,196,220,239,15,34,79,80,132,133,177,196,220,239,15,34,79,80,132,133,177,196,220,239,15,34,79,80,132,133,177,196,220,239,15,34,79,80,132,133,177,196,220,239,15,34,79,80,132,133,177,196,220,239,15,34,79,80,132,133,177,196,220,239,15,34,79,80,132,133,177,196,220,239,15,34,79,80,132,133,177,196,220,239,15,34,79,80,132,133,177,196,220,239,15,34,79,80,131,132,133,177,196,220,239,15,34,80,131,132,177,196,220,239,15,34,80,130,131,132,177,196,220,239,15,34,81,130,131,132,177,196,220,239,15,34,81,130,131,177,196,220,239,15,34,81,82,129,130,131,177,196,220,239,15,34,82,83,129,130,177,196,220,239,15,34,82,83,128,129,130,177,196,220,239,15,34,83,84,128,129,177,196,220,239,15,34,83,84,85,127,128,129,177,196,220,239,15,34,84,85,126,127,128,177,196,220,239,15,34,85,86,126,127,177,196,220,239,15,34,86,125,126,127,177,196,220,239,15,34,86,87,124,125,126,177,178,196,220,239,15,34,87,88,89,124,125,178,196,220,238,239,15,34,88,89,123,124,178,196,220,238,15,34,89,90,122,123,178,196,220,238,15,34,90,91,122,178,196,197,219,220,238,15,34,91,92,121,178,179,197,219,238,15,34,92,93,120,179,197,198,218,219,238,15,34,93,94,118,119,179,198,199,218,237,238,15,34,94,95,117,118,179,199,217,218,237,15,34,95,96,116,117,179,180,199,200,201,215,216,217,236,237,15,34,96,97,115,116,180,201,202,203,213,214,215,236,15,34,97,98,113,114,115,180,181,203,204,205,206,207,208,209,210,211,212,213,236,15,34,99,112,113,181,235,236,15,34,100,101,111,112,181,182,234,235,15,34,101,102,110,111,182,183,234,15,34,102,103,109,110,183,233,234,15,34,103,104,108,109,183,184,232,233,15,34,104,105,107,108,184,185,231,232,15,34,105,106,107,185,186,230,231,15,34,186,187,229,230,15,34,187,188,189,227,228,229,15,34,189,190,191,225,226,227,15,34,191,192,193,223,224,225,15,34,193,194,195,196,197,220,221,222,223,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,197,198,199,200,201,202,203,204,205,206,213,214,215,216,217,218,219,220,206,207,208,209,210,211,212,213,46,47,48,49,50,51,52,53,54,55,68,69,70,71,72,73,74,75,76,77,78,94,95,96,97,98,99,100,101,102,103,104,105,106,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,147,148,149,150,151,152,153,154,155,156,157,158,159,160,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,46,55,56,68,78,94,106,122,136,146,147,160,167,195,46,56,68,78,94,106,107,122,136,146,160,167,195,46,56,57,68,78,93,94,107,122,136,146,160,167,195,46,57,58,68,78,93,107,122,136,137,146,160,167,195,46,58,68,78,93,107,108,122,137,145,146,160,167,195,46,58,59,68,78,92,93,108,122,137,145,160,167,195,46,59,60,68,78,92,108,109,122,137,145,160,167,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,46,60,68,78,91,92,109,122,130,137,138,145,152,160,167,177,46,60,61,68,78,91,99,100,101,109,122,130,138,144,145,152,160,167,177,46,61,62,68,78,91,99,101,102,109,110,122,130,131,132,138,144,152,160,167,177,46,55,62,68,78,90,98,99,102,110,122,130,132,138,144,150,151,152,160,167,177,46,55,62,63,68,78,90,98,102,110,122,130,132,138,139,144,150,152,160,167,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,46,55,63,64,68,78,90,98,102,103,110,111,122,130,132,133,139,143,144,149,150,152,160,167,194,46,55,56,64,65,68,78,89,90,98,103,111,122,130,133,139,143,149,152,160,167,194,46,55,56,57,65,68,78,89,97,98,103,111,112,122,130,133,139,143,149,152,160,167,194,46,55,57,65,66,68,78,88,89,97,103,112,122,130,133,139,140,143,149,152,160,167,194,46,55,57,58,66,67,68,78,88,97,103,104,112,122,130,133,134,140,142,143,148,149,152,160,167,194,46,55,58,59,78,88,96,97,104,112,113,122,130,134,140,141,142,148,152,160,167,194,46,55,59,78,87,88,96,104,113,122,130,134,148,152,160,167,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,46,55,59,60,78,87,96,97,98,99,100,101,102,103,104,113,122,130,134,135,148,152,160,167,177,46,55,60,61,78,87,113,114,122,130,135,147,148,152,160,167,177,46,55,61,78,86,87,114,122,130,135,147,152,160,167,177,46,55,61,62,78,86,114,122,130,135,147,152,160,167,177,46,55,62,63,78,85,86,114,115,122,130,135,136,147,152,160,167,177,46,55,63,78,85,115,122,130,136,146,147,152,160,167,177,46,55,63,64,78,85,115,116,122,130,136,146,152,160,167,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,46,55,64,65,78,84,85,94,95,96,97,98,99,100,101,102,103,104,105,106,107,115,116,122,130,136,146,152,160,167,196,46,55,65,78,84,93,94,107,116,122,130,136,137,146,152,160,167,196,46,55,65,66,78,84,93,107,116,117,122,130,137,145,146,152,160,167,196,46,55,66,67,78,83,84,93,107,117,122,130,137,145,152,160,167,196,46,55,67,78,83,92,93,107,108,117,122,130,137,145,152,160,167,196,46,55,67,68,78,82,83,92,108,117,118,122,130,137,138,145,152,160,167,196,46,47,48,49,50,51,52,53,54,55,68,69,70,71,72,73,74,75,76,77,78,82,83,84,85,86,87,88,89,90,91,92,108,109,110,111,112,113,114,115,116,117,118,122,123,124,125,126,127,128,129,130,138,139,140,141,142,143,144,145,152,153,154,155,156,157,158,159,160,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196};
const unsigned long y_points[NUM_POINTS] = {209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,209,208,208,208,208,208,208,207,207,207,207,207,207,206,206,206,206,206,206,205,205,205,205,205,205,204,204,204,204,204,204,203,203,203,203,203,203,202,202,202,202,202,202,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,201,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,199,199,199,199,199,199,199,199,199,199,199,199,199,199,199,199,199,199,199,199,199,199,198,198,198,198,198,198,198,198,198,198,198,198,198,198,198,198,198,198,198,198,197,197,197,197,197,197,197,197,197,197,197,197,197,197,197,197,197,197,197,197,196,196,196,196,196,196,196,196,196,196,196,196,196,196,196,196,196,196,195,195,195,195,195,195,195,195,195,195,195,195,195,195,195,195,194,194,194,194,194,194,194,194,194,194,194,194,194,194,194,193,193,193,193,193,193,193,193,193,193,193,193,193,193,193,192,192,192,192,192,192,192,192,192,192,192,191,191,191,191,191,191,191,191,191,191,191,190,190,190,190,190,190,190,190,190,190,189,189,189,189,189,189,189,189,189,189,188,188,188,188,188,188,188,188,188,188,187,187,187,187,187,187,187,187,187,187,186,186,186,186,186,186,186,186,186,186,185,185,185,185,185,185,185,185,185,185,184,184,184,184,184,184,184,184,184,184,183,183,183,183,183,183,183,183,183,183,182,182,182,182,182,182,182,182,182,182,181,181,181,181,181,181,181,181,181,181,180,180,180,180,180,180,180,180,180,180,180,179,179,179,179,179,179,179,179,179,178,178,178,178,178,178,178,178,178,178,177,177,177,177,177,177,177,177,177,177,176,176,176,176,176,176,176,176,176,175,175,175,175,175,175,175,175,175,175,175,174,174,174,174,174,174,174,174,174,174,173,173,173,173,173,173,173,173,173,173,173,172,172,172,172,172,172,172,172,172,172,171,171,171,171,171,171,171,171,171,171,171,171,170,170,170,170,170,170,170,170,170,170,170,169,169,169,169,169,169,169,169,169,169,168,168,168,168,168,168,168,168,168,168,167,167,167,167,167,167,167,167,167,167,167,167,166,166,166,166,166,166,166,166,166,166,166,166,165,165,165,165,165,165,165,165,165,165,164,164,164,164,164,164,164,164,164,164,163,163,163,163,163,163,163,163,163,163,163,162,162,162,162,162,162,162,162,162,162,161,161,161,161,161,161,161,161,161,161,161,160,160,160,160,160,160,160,160,160,160,160,160,159,159,159,159,159,159,159,159,159,159,159,158,158,158,158,158,158,158,158,158,158,158,158,158,158,158,158,157,157,157,157,157,157,157,157,157,157,157,157,157,157,156,156,156,156,156,156,156,156,156,156,156,156,156,156,156,156,156,156,156,156,156,155,155,155,155,155,155,155,155,154,154,154,154,154,154,154,154,154,154,153,153,153,153,153,153,153,153,153,152,152,152,152,152,152,152,152,152,151,151,151,151,151,151,151,151,151,151,150,150,150,150,150,150,150,150,150,150,149,149,149,149,149,149,149,149,149,148,148,148,148,148,148,147,147,147,147,147,147,147,147,146,146,146,146,146,146,146,146,145,145,145,145,145,145,145,145,144,144,144,144,144,144,144,144,144,144,144,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,143,142,142,142,142,142,142,142,142,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,98,97,97,97,97,97,97,97,97,97,97,97,97,97,97,96,96,96,96,96,96,96,96,96,96,96,96,96,95,95,95,95,95,95,95,95,95,95,95,95,95,95,94,94,94,94,94,94,94,94,94,94,94,94,94,94,93,93,93,93,93,93,93,93,93,93,93,93,93,93,92,92,92,92,92,92,92,92,92,92,92,92,92,92,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,91,90,90,90,90,90,90,90,90,90,90,90,90,90,90,90,90,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,88,88,88,88,88,88,88,88,88,88,88,88,88,88,88,88,88,88,88,88,88,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,87,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,86,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,84,84,84,84,84,84,84,84,84,84,84,84,84,84,84,84,84,84,84,84,84,84,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,82,82,82,82,82,82,82,82,82,82,82,82,82,82,82,82,82,82,82,82,82,82,82,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,81,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,80,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,78,77,77,77,77,77,77,77,77,77,77,77,77,77,77,77,77,77,76,76,76,76,76,76,76,76,76,76,76,76,76,76,76,75,75,75,75,75,75,75,75,75,75,75,75,75,75,75,74,74,74,74,74,74,74,74,74,74,74,74,74,74,74,74,74,74,73,73,73,73,73,73,73,73,73,73,73,73,73,73,73,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,72,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,70,69,69,69,69,69,69,69,69,69,69,69,69,69,69,69,69,69,69,69,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,67,67,67,67,67,67,67,67,67,67,67,67,67,67,67,67,67,67,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65};
/* END */

void setup() {
  dac_output_enable(DAC_CHANNEL_1); 
  dac_output_enable(DAC_CHANNEL_2);
}

void loop() {
  for(int loop_counter = 0; loop_counter < NUM_POINTS; loop_counter++) {
    dac_output_voltage(DAC_CHANNEL_1, x_points[loop_counter]);
    dac_output_voltage(DAC_CHANNEL_2, y_points[loop_counter]);
    delayMicroseconds(1);
  }
}


Generate Your own Code

I just developed an online web tool to convert 255x255px images to ADC values for showing on the oscilloscope. You can use the test image file provided below to generate the exact code on the example and also you can modify the image and generate a code with your crush name.

∿
app
OscillosPlot

Convert the image to an oscilloscope project Arduino C array

  1. Open my OscillosPlot web app and insert your image
  2. Convert to monochrome
  3. Copy the code from /* START */ to /* END */ and paste it on the example given above.
Web App

Demo Video

video_2022-10-17_21-49-59.mp4video/mp416.4 MB

Backup

In any case, if things don’t go according to your plan, remember


References

ESP32Oscilloscope
Mohammed Ashad
Admin

Browse the archive for more, or subscribe to get new posts in your inbox.

← previous
OPEN-SMART ILI9327 3.2 Inch TFT LCD Shield With Arduino UNO
next →
The Evolution of CakeMail: From Google Sheets to People API

Discussion 0 comments

Be kind. I read everything but might take a day or two to reply.

no comments yet — be the first
// related

More from this category

Introducing Elabins Portfolio Blocks: A Modern WordPress Portfolio Plugin with GitHub Integration
Blog
Apr 26, 2025/ 3 min read

Introducing Elabins Portfolio Blocks: A Modern WordPress Portfolio Plugin with GitHub Integration

Discover Elabins Portfolio Blocks, a modern WordPress portfolio plugin designed for developers, designers, and creators. With seamless GitHub integration, customizable portfolio blocks, and Gutenberg support, it makes showcasing projects easier, faster, and more professional.

GitHub-ActionsWordPress
read article
The Evolution of CakeMail: From Google Sheets to People API
Blog
Apr 07, 2025/ 3 min read

The Evolution of CakeMail: From Google Sheets to People API

Take a behind-the-scenes look at the evolution of CakeMail, from a simple Google Sheets-powered mailing tool to a more scalable solution built around the Google People API. Discover the challenges, lessons learned, and technical decisions that shaped its growth.

AutomationGASGmail
read article
Heroku
Blog
Oct 31, 2021/ 2 min read

Deploying Node-RED into Heroku

Learn how to deploy Node-RED on Heroku and run your flows in the cloud without managing a dedicated server. This guide covers setup, configuration, deployment steps, and common issues to get your Node-RED instance online quickly.

HerokuIoTNode-red
read article