Make your own very crude Walkie-talkie with an Arduino
video description
Hope you can help me out for my little problem of Diy PTT for Android apps Zello.
Actually i've already made my Extramic with ptt button for my Android device with Zello walkie talkie apps, but I'm not satisfied because of its Toggle mode.
What i want is real Push To Talk, and release the PTT button when i've finished talking.
The problem lies on android device ( and Zello as well ) that recognize external function for Push To Talk by shorting the mic input from android device (4 poles jack, CTIA) with ground (zero ohm) with immediate release. And the Zello now transmit (but in Toggle mode.
by the time I finished talking, i must short the mic input again with ground to end this transmission. I really don't like this Toggle mode. I want a real push and hold to talk which is impossible for me to solve it out because by the time i'm pressing the PTT button, the microphone in zero ohm with ground.
Please help me out from this bothering trouble.
A simple logic yet but i can't apply it: (
1. When PTT button is pressed, then the logic ic (perhaps arduino system) will do a quick short the mic input to ground then immediately release it(So that i can talk. Now the Zello recognize it as Toggle mode and start the transmission, but in FACT I'm still pressing the PTT button.
2. When PTT button is released, then the logic ic (perhaps arduino system) will do again a quick short the mic input to ground then immediately release it. (By now the Zello will recognize this command to end the transmission.
Appreciate for your kind help and reply.
Thanks and best regards,
Pius NL. Tan
piushartantogmail. com
Date: 2020-09-05
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Comments and reviews: 9
Muhammad
Hey, I'm a newbie and don't know much about electronics but, if we split the analog audio into 3 ADC and separated them into 3 phases like 3 phase AC as such then combine the digital form together to make theoretically 48khz (if using the 16khz thing. Again I'm a newbie and I don't know if this is true or not but it's just sound very logical in my brain: v Also is adding amp thing at the receiver and a signal smoother (some kind of filter or something )thing help?
reply
Hey, I'm a newbie and don't know much about electronics but, if we split the analog audio into 3 ADC and separated them into 3 phases like 3 phase AC as such then combine the digital form together to make theoretically 48khz (if using the 16khz thing. Again I'm a newbie and I don't know if this is true or not but it's just sound very logical in my brain: v Also is adding amp thing at the receiver and a signal smoother (some kind of filter or something )thing help?
reply
Robert
If you are interested in looking in to it, in the ham radio community there have been voice over digital protocols written like free dv that only use 1600hz or so of bandwidth, while the nrf2401 uses a whoppin 1mhz, your walkies can send audio with good quality leaving enough to spare for gps data, heart rate, tire pressure and whatever else! Although im sure the port to an arduino may not be to simple if even possible
reply
If you are interested in looking in to it, in the ham radio community there have been voice over digital protocols written like free dv that only use 1600hz or so of bandwidth, while the nrf2401 uses a whoppin 1mhz, your walkies can send audio with good quality leaving enough to spare for gps data, heart rate, tire pressure and whatever else! Although im sure the port to an arduino may not be to simple if even possible
reply
Makarov
Another solution would be to get one of those headphones that go in just one ear and have a microphone that connect via bluetooh to a phone and use a communication application or simply call, obviously you could modify the bluetooh headset to make it more comfortable and functional
reply
Another solution would be to get one of those headphones that go in just one ear and have a microphone that connect via bluetooh to a phone and use a communication application or simply call, obviously you could modify the bluetooh headset to make it more comfortable and functional
reply
DAVID
You will need a combined Quadrature Sampling Detector/Quadrature Sampling Emitter Transceiver module which requires you to program your board to sample the I/Q inputs and demodulate it and send it to a speaker or generate the I/Q signals that will drive the transceiver module.
reply
You will need a combined Quadrature Sampling Detector/Quadrature Sampling Emitter Transceiver module which requires you to program your board to sample the I/Q inputs and demodulate it and send it to a speaker or generate the I/Q signals that will drive the transceiver module.
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Mithilesh
I have tried it and it works great,
You just have to connect speakers directly to pin 9, 10(or with amp like lm386.
If ground wire is too close to output signal, sound quality gets terribly worst
Otherwise it's considerably clear.
reply
I have tried it and it works great,
You just have to connect speakers directly to pin 9, 10(or with amp like lm386.
If ground wire is too close to output signal, sound quality gets terribly worst
Otherwise it's considerably clear.
reply
Andre
Didnt work on the protoboard: lets make a PCB!
thats not the way people usually go! Im a little disappointed I must say as I was expecting some debugging. At least a little bit.
Nice video and nice try nonetheless
reply
Didnt work on the protoboard: lets make a PCB!
thats not the way people usually go! Im a little disappointed I must say as I was expecting some debugging. At least a little bit.
Nice video and nice try nonetheless
reply
Dan-Samuel
Hi GreatScott! I'm currently attempting to replicate this design while slightly modifying some resistor values. I wanna ask, can the 3pin 16mhz crystal be replaced with a 2pin one? Thanks for the great video!
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Hi GreatScott! I'm currently attempting to replicate this design while slightly modifying some resistor values. I wanna ask, can the 3pin 16mhz crystal be replaced with a 2pin one? Thanks for the great video!
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Willy
Could you make a Arduino based motion activated trail camera that can transmit a live feed via a 5, 8 GHz video transmitter? It would be great if you could remotely control it with LoRa too.
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Could you make a Arduino based motion activated trail camera that can transmit a live feed via a 5, 8 GHz video transmitter? It would be great if you could remotely control it with LoRa too.
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Otto
But you showed us the result and you explained about the result and you also mentioned dedicated audio streaming ICs so I enjoyed the video of very much thank you for the information
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But you showed us the result and you explained about the result and you also mentioned dedicated audio streaming ICs so I enjoyed the video of very much thank you for the information
reply
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