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MP3 modules, switch clocks, switch clocks with sound player, school bells

Often you need a circuit for simple functions that, when you press a button, start playing an audio file. (Information boards, school bells, beeps, etc.).

Several MP3 player circuits were made. The number of starting inputs ranges from one to ten. The MP3 audio files can be stored in the internal memory of the audio player module, or on an SD card, or a pen drive.

MP3 modules

You can play MP3 files.
It has digital inputs, to connect pushbuttons or other sensors. (motion sensor etc.)

It can drive a speaker directly.

Several MP3 player circuits were made.
The number of starting inputs ranges from one to ten.
The MP3 audio files can be stored in the internal memory of the audio player module, or on an SD card, or a pen drive.

School Bell Alarm Timer Clock, Automatic School Bell Timer

The CLOCK50M switch clock has one switch output, and also has a 12V output for the conventional "ringer" bell. Two independent, 50-element switching programs can be loaded into it. You can select the programs at the press of a button. The programming can be done via a program running on a PC, via a USB port. (WIN7, WIN10) The programmed data will not be lost, and the timing will not be interrupted in the event of a power failure.

Switch clock with audio output

The extended version of the CLOCK50M the CLOCK50MP3. This is a switch clock with audio playback function. It can give an audio signal to a sound system. But it can drive a speaker or soundbox on its own.

 

 

Csaba Torkos

Hungary

8100 Varpalota Tancsics u. 7.