Supply voltage: 5V DC voltage (USB, mobile phone charger
Board size: 100*36mm
Features:
1. Built-in 4 songs (Happy Birthday, Little Apple, Two Tigers, etc.)
2. Press the button in music mode to switch songs
3. Among the keyboard modes, seven buttons can pop up “
do re mi fa so la si do"
4. The board comes with "two tigers" songs, which makes it easy for users to play music anytime, anywhere.
5. The circuit comes with a power amplifier drive circuit, the sound is not very big, but it can be heard clearly, such as to amplify the volume
You can add a power amplifier circuit yourself.
Circuit principle:
The keyboard of the single-chip microcomputer is designed with single-chip + button + speaker
1. Key Description: From the first one on the left, reset, 1 button, 2 button, 3 button, 4 button, 5 button, 6 button, 7 button, music button.
2. Single-chip model: STC89C52/51, AT89C52/51, AT89S52/51 are optional.
3. This keyboard has 4 songs built in, which can add songs in the program.
4. music key selection to play music
5. the module download interface has been introduced, with the USB download module can easily re-download their modified program, and there is a corresponding video tutorial, your design is so simple is so simple
6. the characteristics of this design: wide range of use, stable, very convenient to operate, can be used after power-on