On the basis of sound electronic modules, you can make a lot of various homemade products. It can be doorbells, toys speaking a text or some kind of musical fragments, voice acting with voice of important signals or parameters of a car or devices, an answering machine of an intercom, etc. In general, the large scope of application of these sound modules depends only on your fantasies and skills.
In the circuit board on the chip You can record five sound files via the USB connector by connecting it to a computer. At the same time, the sound file download program is loaded, wired into the module. We select the necessary files in MP3 format, then upload to the module.
Contacts K1-K5 are used to play files loaded into memory , we close the desired contact to the ground and the corresponding sound file is played. Contacts SPK +, SPK- for connecting a speaker. Contacts DC-5V, GND for supplying voltage of 5 volts.
The 8002A microcircuit, installed on the reverse side of the board, represents a 2 W low-frequency amplifier providing a good sound volume.
First, for verification, we assemble this standard circuit on a breadboard.
We check the circuit, all recorded speech signals should play normally.
This module can be used in a car to reproduce reminiscent speech signals, for example, the tailgate is not closed, the parking brake is on, the door is open, the main beam is on (dimensions, dipped beam), etc.
To do this, you need to assemble another wiring diagram.
We take a +12 volt signal from the main beam lamp. Through a divider of two resistors, the voltage decreases to +5 Volts and is fed to the inverter on the K155LA3 chip. At the inverter output, we obtain a signal of a logical unit and, accordingly, a module will play the speech file.
Will need
For the manufacture of this homemade needed:
- JQ6500 module board0.5 W loudspeaker -1pcs;
- -Case from the doorbell -1pcs;
- - -1 PC;
- --1 PC;
- Microcircuit K155LA3-1pcs;
- -resistors 10 kOhm and 1 kOhm - 4 pcs each;
- -bread board;
- -connecting wires;
- soldering iron;
- -Klemnik.
Manufacturing Informant
Cut off the necessary piece from the breadboard and place the module on it , K155LA3 chip, resistors and terminal block (for connecting input control signals). Using thin wires, solder the circuit. Everyone in the circuit board has a negative power rail.
To increase the volume, you can connect an additional sound amplifier .
serves to convert the voltage of the on-board network of 12 Volts to the supply voltage of 5 Volt modules.
All shawls are well placed in the case from the old doorbell.
In the car, the device is connected to the on-board network of 12 Volts and through the terminal block we feed the input control signals.
It turned out an interesting inexpensive device for making sound signals in the car as well as in many other areas of application, made by hand.
Watch the video
The video shows the verification process and device test.
