Make your own very crude Walkie-talkie with an Arduino
HTML-код
- Опубликовано: 20 июл 2019
- JLCPCB SMD assembly coming soon: jlcpcb.com
Here is how to fix my Walkie-talkie: • #279 How to debug Ardu...
Previous video: • DIY Light Barrier Alar...
HACKED!: TV Remote becomes an RF Remote: • HACKED!: TV Remote bec...
Support me for more videos: / greatscott
Facebook: / greatscottlab
Twitter: / greatscottlab
You can find the schematic & PCB design on EasyEDA:
bit.ly/2xX307A
bit.ly/30J6GX6
Or you can download it here: / 28513352
Websites which were shown in the video:
tmrh20.github.io/RF24Audio/
github.com/nRF24/RF24Audio
www.ti.com/product/CC8520
en.wikipedia.org/wiki/Samplin...)
In this project I will be showing you how I tried to create a Walkie-talkie with the Arduino development board and the nRF24. Along the way I will present you the functional principle of a Walkie-talkie and at the end create a kind of working prototype.
Thanks to JLCPCB for sponsoring this video
Visit jlcpcb.com to get professional PCBs for low prices
Music:
2011 Lookalike by Bartlebeats
Here is how to fix my Walkie-talkie:
You seriously need to be sponsored by a marker pens company...
Hi I think problem is that you put speaker directly to PWM output. I think you should use filters to make signal smoother.
It's good you showing your failed projects (many of them) but you should continue them till you get it right. Isn't that the point of making stuff? I feel you're just pumping them out just to get your JLCPCB sponsor in.
100 mV, gain of 100, so the output can reach 10V. But you opamp works between -3.3V and +3.3V, so the output will saturate. You can try to reduce the gain (e.g. 30) and try to use big resistors... For example 10 Mohm for the feedback resistor and 330kOhm for the input resistor of the inverting opamp
If only there were some easy, ancient technology that didn't rely on microprocessors to transmit audio wirelessly... Some sort of frequency modulation technology or something... We can but dream ;-)
PWM signal is emmmm.....better be called digital signal,but audio is analog signal....you need a LPF to convert PWM signal to analog audio signal or use a DAC + PA directly...
Can u share the Arduino code you wrote? I want to try this project for myself but can´t manage to make the software work properly :/
This seems unnecessarily complicated. Why not just use an esp8266 and espnow? Cheaper, easier and less components.
May be he is catching alien audio signals 😄
I'm surprised there wasnt any debugging to find where the audio is getting messed up.
"How many arduinos do you have?"
Hi, correct me if I am wrong but don't you need a LC filter after PWM output of the arduino before hooking up output to a speaker?
Excellent video, especialy because of a failed project. The best way to learn.
Always wanted something like this. Thanks for all your great projects!
I always love whatever you do,
Thank you Scott... I have been looking for this for last 4yrs... Numerous time I thought of building one..but due to lack of knowledge and skill, I could not.
I very much admire you for sharing (and pain editing videos) projects which didn't work out well. Is a great way for me to learn and skip this time consuming trials.
The amp seems to be clipping (you can see it clip in the oscilloscope recording), you seem to be missing a DAC on the receiver, and 16 kHz sample rate is only good for 8 kHz audio (should be okay for speech); so you need a 8 kHz low pass filter before the ADC and another 8 kHz low pass filter after the (missing) DAC in order to remove all of the useless higher frequency noise and distortion which you are otherwise hearing which is above Shannon Nyquist frequency.
Please continue with this project! This is a really functional build, I will definitely build one 🤩