Programmable Temperature Sensor with LCD Display, Alarm
Wednesday, November 25 2009 @ 07:31 AM CST
Views: 390
Programmable temperature sensor, core of circuit is Atmel microcontroller 89C51 and Dallas DS1822 is used as temperature sensor, 16x2 LCD module which displays temperature and two buttons which can be used accordingly depending on your requirement.
LCD Module is connected to Port 0, P0.0 through P0.7 and P2.5, P2.6 , P2.7
1wire temperature sensor is connected to P1.1, LED is connected to P1.0, Push buttons are connected to P1.2 and P1.3, Transistor T1 to P1.4, Device connected to P- and P+ can be switched on / off using P1.4.
This is kit does not include program, you may program as per your requirements.
Circuit Description:
89C51 Pins LCD Module:
Pin1 (LCD-SV1-1) -> GND
Pin2 (LCD-SV1-2) -> VCC
Pin3 (LCD-SV1-3) -> Contrast
P2.5 - (26) Pin4 (LCD-SV1-4 ) -> RS
P2.6 - (27) Pin5 (LCD-SV1-5 ) -> R/W
P2.7 - (28) Pin6 (LCD-SV1-6 ) -> E
P0.7 - (32) Pin7 (LCD-SV1-7 ) -> DB0
P0.6 - (33) Pin8 (LCD-SV1-8 ) -> DB1
P0.5 - (34) Pin9 (LCD-SV1-9 ) -> DB2
P0.4 - (35) Pin10 (LCD-SV1-10 ) -> DB3
P0.3 - (36) Pin11 (LCD-SV1-11 ) -> DB4
P0.2 - (37) Pin12 (LCD-SV1-12 ) -> DB5
P0.1 - (38) Pin13 (LCD-SV1-13 ) -> DB6
P0.0 - (39) Pin14 (LCD-SV1-14 ) -> DB7
Pin15 (LCD-SV1-15 ) -> LED+
Pin16 (LCD-SV1-16 ) -> LED-
LED / Buttons / Sensors
P1.0 LED
P1.1 1Wire Temp Sensor
P1.2 Button
P1.3 Button
P1.4 Transistor Driver
Schematic
What's Related