The microcontroller PIC18F252 can collect small, cost-effective device that lets you play Liu battle sound, digitized and captured in programmes GE memory mikrokontrol Lera. For example, kolokol th jingle. VA Home scheme is shown in Figure 1. 1.
Figure. 1
Memory buffer pro gram programmer for gruzhaem working pro gram, which takes in it area 0n-115N. In the area of 200 n — 7FFFN you but download 32256 bytes of sound recording. Digital recording the desired sound (to lokolnogo ringing) I found on the Internet. Using audioredaktora Ashampoo Music Studio 6 chose her to plot the correct length and placed it in wav format audio file. Monofo — technical, discretization eight binary digits, frequency kvantova tion is 32 kHz.
With WinHex editor I have converted the resulting audio file NEH-format. Then combined the two HEX-file (kolokol. Hex and sound. Hex) buffer memory microcontroller program IC-Prog, then downloaded the contents of the buffer to the micro controller.
Not all programmers allow to combine NEH-files, erasing in Buffe re content first before the app Koi second. In this case, the program functions of the microcontroller should be carried out in two. First download one file, and then the eyes retain memory of the microcontroller, downloaded the aim of the second. For those and this opera tion may seem daunting, I enclose herewith the article file kolokol. Neh, containing and program, and record sound of the Bell.
After clicking on the SV1 pro grammes microcontroller poocherjod but takes digital Signa bytes la from his program memory and passes them to the port of exit port. connected Choon-homemade digital-to-analog converter (resistors R3-R8). Combined with the output device reproduces the UMZCh Bell. With transparent program it rings 12 times, then go silent until you press the button.
The maximum level you original signal is 700 MB. Current consumption of the device is 10 Ma VA.
Printed circuit board of the device is shown in Figure 1. 2.
Fig. 2
Printed circuit board in the format *.lay
Author: A. PICHUGOV, R. p. Vargashi Kurgan region.
