Distributor of MikroElektronika: Excellent Integrated System Limited
Datasheet of MIKROE-701 - BOARD UNI-DS6 DEV SYSTEM
Contact us: [email protected] Website: www.integrated-circuit.com
13
UNI-DS6
MikroElektronika
page
9. Piezo buzzer
Due to a built-in piezo buzzer, the UNI-DS6 development system is capable of emitting audio signals� In order to enable
the piezo buzzer to operate properly it is necessary to generate a voltage signal of specific frequency. Remember, when
writing code for voltage signal generation, that the piezo buzzer’s resonant frequency is 3�8kHz� Other frequencies in
the range between 20Hz and 20kHz can also be used, but the best performance is provided with frequencies ranging
between 2kHz and 4kHz� To establish connection between the piezo buzzer and the microcontroller, it is necessary to
place jumper J14 in adequate position� If jumper J14 is placed in the RC1 position the RC1 MCU pin is used for signal
generation, Figure 9-2� Otherwise place jumper J14 in the RA4 position in order to use the RA4 MCU pin for signal
generation, Figure 9-3�
VCC-5V
BUZZER
R22
PZ1
10K
R23
1K
Q1
BC846
RC1
RA4
J14
RA4
RE4
RE2
RA12
RB4
RF12
RB12
RG4
RC4
RG12
RC12
RH4
RD4
RJ4
RD12
USB-VBUS
RA6
RA14
RF6
RB6
RF14
RB14
RG6
RC6
RG14
RC14
RH6
RD6
RJ6
RD14
#RX232A
#TX232A
#SCL
#SDA
#SS1#
#SCK1
#MISO1
#MOSI1
USB-DP
RA0
RE0
RA8
RF0
RE6
RB0
RF8
RB8
RG0
RC0
RG8
RC8
RH0
RD0
RJ0
RD8
RA2
RA10
RF2
RF4
RB2
RF10
RB10
RG2
RC2
RG10
RC10
RH2
RD2
RJ2
RD10
RA5
RA13
RB5
RF13
RB13
RG5
RC5
RG13
RC13
RH5
RD5
RJ5
RD13
RA7
RA15
RF7
RF5
RF3
RB7
RF15
RB15
RG7
RC7
RG15
RC15
RH7
RD7
RJ7
RD15
#RX232B
#TX232B
#CS1#
#CS2#
#SS2#
#SCK2
#MISO2
#MOSI2
USB-DN
RA1
RE1
RA9
RF1
RE7
RE5
RE3
RB1
RF9
RB9
RG1
RC1
RG9
RC9
RH1
RD1
RJ1
RD9
RA3
RA11
RB3
RF11
RB11
RG3
RC3
RG11
RC11
RH3
RD3
RJ3
RD11
VCC-SW
VCC-5V
CN20
CN21
Figure 9-4
: Piezo buzzer connection schematic
Figure 9-1
: Piezo buzzer
Figure 9-3
: Signal generation via RA4
Figure 9-2
: Signal generation via RC1
14 / 25
14 / 25
