This DS18S20 digital thermometer provides a precision of 0. 5 °C and SCRATCHPAD it`s read at every 800ms. Capacitors C5, C6 and diodes D8, D8 makes a voltage doublers which power the lcd panel. The DS18S20 temperature sensor it`s wrapped in a thermo contractil tube. For connection cable I chose a type used in audio (coaxial stereo) that is only 1 m
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long, perfect for most applications. ;=lcd digital thermometer with ds18s20 Version 2. 1=14/11/03= ; iic lcd driver: PCF2103 ; ra0, ra1 iic sclock, sdata ; ra2, ra3 pwm, ds1820 data I/O ; internal clock ; standard crystal 4. 194 MHz XT -. 95us pe instructiune ; ;- list p=16f84;f=inhx8m #INCLUDE P16F84. INC _CP_OFF equ H`3FFF` ;code protect off _PwRTE_ON equ H`3FFF` ;Power on timer on _wDT_OFF equ H`3FFB` ;watch dog timer off _XT_OSC equ H`3FFD` ;crystal oscillator _CONFIG _CP_OFF & _PwRTE_ON & _wDT_OFF & _XT_OSC ;- ; cpu init count1 equ 0C count2 equ 0D count3 equ 0E transo equ 0F ratb equ 10 dig1 equ 11 dig2 equ 12 dig3 equ 13 semn equ 14 #DEFINE sclk PORTA, 0 #DEFINE sdta PORTA, 1 #DEFINE osc PORTA, 2 #DEFINE grad PORTA, 3 ;- ;- ; cpu init org 0x00 goto init org 0x04 ; ;- init call usaex call usbex movlw 0x00 movwf PORTA movwf PORTB clrf semn ;* ;* ;* Lcd init commands * ;* lcd_ini call iict ; i2c start movlw 0x74 ; device write address (75h for read) call act ; i2c send subroutine movlw 0x00 ; Co, RS=0, set instruction register for multiple next command bytes call act movlw 0x31 ; extended instruction set call act movlw 0x02 ; set screen configuration left to right call act movlw 0x05 ; set display configuration call act movlw 0x08 ; set icon mode, full mode, icon blink disable call act movlw 0x30 ; normal instruction set call act movlw 0x0C ; set display on call act movlw 0x06 ; set cursor move direction call act movlw...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
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This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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