User`s manual

DemoKit-LG2 User’s Manual
Example:
V
DD = 5 V; Vthreshold = VC = (0,4 … 0,7) VDD
Typical: V
threshold = 0,6 × VDD
R
REF = 10 kΩ; C = C18 = 220 nF
V DD
V C
1 -t = - R REF x C x ln
1 - 0t = - 10 kΩ x 220 nF x ln
t = 2,0158 ms
V
DD
V C
1 -t = - R REF x C x ln
1 - 0t = - 10 kΩ x 220 nF x ln
t = 2,0158 ms
3.13 Q1 Phototransistor
For light incidence measurement and primarily as an application example, a PT15-21C phototransistor
is connected to the ANI0 analog input, which is equal to port P20 of the MCU.
3.14 BUZ1 Buzzer
To generate acoustic signals and sound waves, a buzzer is connected to the timer output port of the 16-
bit timer/event counter 01, equal to port P06/TI011/TO01 of the MCU. The AC buzzer operates in a
voltage range of 2–5 volts.
3.15 BAT1 Battery Holder
To power the board via battery, equip the BAT1 battery holder with a CR2032 3-volt lithium coin-type
battery.
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