AD22B04 4 Channel DTMF Relay Operation Demo

This is the DTMF audio controller (AD22B04)with four channels, any phone or fixed telephone with DTMF key code remotely controls product relay "open" and "close".(the majority of smartphones and functions machine are DTMF code). Our software "DTMF Dial" (installed in a computer) can be also provided to control relays.

[@jamesallen9733]

This is a good product, it could be used via a 2-way radio with DTMF tones for remote control switching.

[@josinaldopontes3542]

Comprei duas placas dessa e tá com muita instabilidade!. Tem hora que só aciona o rele 3. o que pode ser?

[@markkennard861]

(For more details, refer to " AD22A08_8 channel DTMF controller commands setting manual "). Please make this available as I want to change dtmf code address.

[@cadiscase]

How do you change MODE ? M0 M1 M2 Thanks..

[@aidenschvatkok5732]

There are three sets of contacts on the board that are jumped in different ways to enable the different modes (no idea if it works, waiting for one of these boards in the mail)

[@JennyX69]

Simple basic and easy, perfect for what im doing which im not using a phone but audio clips with tones hidden in specific audio tracks on a mp3 triggered player

[@tariqmirza3443]

It is of no use as its codes are not available anywhere on internet!!!

[@dermotdonnelly5495]

It's not really a remote controller if you have to turn on the phone beside the relay board. You have to have a phone which is capable of auto answering surely?

[@ahmedelwan9129]

you can attach it to gsm module

[@flyoversirens3704]

You can use it with a phone that automatically answers, a two way radio, or maybe a gsm module.

[@TexasRailfan2008]

You can use a handheld amateur radio to revive and then have another one to transmit

[@wolfgangzeisig6313]

to me , it does not make any sense

[@beheugrjondinasahitieyegey8233]

bruh lol

[@joelamelin2052]

zero le tuto