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ESP32 SDR: from failed 433 MHz experiments to live phone decoding

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An ESP32-S3 investigation, updated with live Android decoding and physical tests on 17 October 2026. An ESP32-S3 can expose real radio samples. The question is how far that capability carries toward useful applications. Conceptual illustration. I wanted to turn an ESP32 into something more ambitious than another Wi-Fi gadget: a small radio instrument that could capture a remote-control transmission, send the recording to a phone, decode it and eventually reproduce it. The starting point was the ESPARGOS esp-sdr project , which exposes raw radio samples from hardware already inside supported ESP32 chips. That is an exciting capability. It also raises an easy-to-misunderstand question: if software can ask the chip to tune to a frequency, can the chip actually receive useful information there? We tested that question through firmware changes, controlled radio transmissions, independent receivers and a Flutter phone app. We tried GPS, broadcast FM, 433 MHz remote-control signals, n...
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Turn your smartphone or tablet into a 3d hologram - Amazing DIY project for kids

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Hey Folks,

So recently i saw an amazing instructable on 3d projection pyramid and it seemed so cool, so me and my friend tried it out (its mostly my friend). It turned out to be so amazing that i decided to write about this on my blog. So here i am. And if you are a parent or kid looking for an amazing weekend project or something to show on science fair, you have come to the right place :D

When i say its amazing, its totally an understatement, you will be a taken back by the simplicity of the project. Its really easy and it only involves some plastic and a smartphone or tablet with decent resolution display. Both are easy finds these days.

Basically you will see an illusion of 3d projection display without the need of any sophisticated hardware or 3d glasses. Its really cool when you actually see it live.

To make it you could need to use thin sheet of reflective material, first we used acrylic sheet with was thick and it gave us bad results due to dual reflections on the both sides due to thickness. So i suggest you should go with something like OHP sheet (used in overhead projectors in classrooms) which is easily available in stationary stores. You will need a scissors, a marker and some transparent sealing tape to hold it together.

First you will need to cut it something like below


You will have to cut 4 of these to form a pyramid like shown below

Top view

side view

sides are joined with transparent sealing tape

just added a bottom too, this is optional

so once its all done you will need to search and get some videos . You can try this playlist on youtube - https://www.youtube.com/playlist?list=PLIBOvx4-v-vb1ilOKLqTQrqdG-T_t2GeG

Just place your phone on top of the pyramid with the help of some support and play the video, and enjoy the rest.

I used some card board and acrylic plates for support
Enjoy the video and please subscribe to my channel if you like it



Also watch the difference when we used acrylic sheets in the first attempt








It looked something like this in pics

couple dance

Face

skull not clear at all due to double reflection

Dancing lady; camera had tough time focusing it


ok so if you guys loved this amazing project please subscribe to my youtube channel, share this on social networks and please spread the word. Thanks and see you next time


Comments

  1. keven johnJanuary 22, 2026 at 11:10 AM

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  2. keven johnJanuary 22, 2026 at 11:13 AM

    The amazing DIY projects of the kids are a fantastic way to get the creativity going and get the little hands occupied with something of substantial use to them. They promote learning, problem solving, and patience but do so in an enjoyable way without making it sound like a lesson. Interestingly, such need of guidance is also relevant to higher studies as well. In some cases when one is objecting to a complex task, having dissertation writing help can help in more clearly and thoroughly organizing the process and to make it much less daunting.

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  3. Emma ClarkApril 23, 2026 at 1:20 PM

    Transforming your tablet or smartphone to produce a 3D hologram is a fun DIY project for kids that encourages creativity and provides educational opportunities to learn about basic science at home with ease. Student CIPD Assignment Writers will find the process simple and effective!

    ReplyDelete

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