Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I have gotten a used Arduino uno board from a friend but he used up the Atmega 328p in another project so it does not have the microcontroller or any usb cable or power supply.I just have the board.
What parts do I have to buy to use it again?
I have made a 8051 circuit which will turn on/off a 5v dc relay according to to sensed temperature.
currently the relay has a 12v input and drives a 12v lamp.
can I connect it to 220v ac and drive something bigger?
yes r14 was set to 10k.I set it to 330 and it is now showing 330.
Ok but the circuit is still not showing the temperature.It is always showing 96.
I have debugged in Keil and have seen than 1111 1111 gives value of 96.
So the 8051 is always getting input of 1111 1111 and converting it to 96...
I have modified the circuit to act as thermometer using ADC0804 and LM35.
Here is the code I have written
ORG 00H
MOV P1,#11111111B // initializes P1 as input port
MOV P0,#00000000B // initializes P0 as output port
MAIN: CLR P3.7 // makes Cs=0
SETB P3.6 // makes RD high...
It is working now.There was some roblem with vsource.It was not working.
I put 330ohm resistors.
The VCC pins of the ICs are hidden.
How do I connect it to a capacitor.They are directly connected to power rails.
ORG 00H
ORG 00H
MOV P0,#00000000B // initializes P0 as output port
mov r2,#00011111B
MOV A,r2 // moves the digital output of ADC to accumulator A
MOV B,#10D // load B with 10D
DIV AB // divides the content of A with that in B
swap a
add a,b
mov p0,a...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
