CONTROLING 230V LIGHT BULB USING COMPUTER (PARALLEL PORT)
Do you want to sit in front of your computer and control Your Appliances like the 230V light bulb then here is a simple project
If you are new please visit How to program the Parallel port in windows to learn the basics.
Set up the circuit as shown below
Note in the picture that the base of the transistor is connected to data port 2 (D1) so we will send
Relay resistance measured was 89.2 Ω
Let Vin be the Parallel port voltage when it is ON
From the Collector-Emitter loop
Remember to include the driver in your project directory
Download the Source Code and Driver file here
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If you are new please visit How to program the Parallel port in windows to learn the basics.
Set up the circuit as shown below
Note in the picture that the base of the transistor is connected to data port 2 (D1) so we will send
out(address,0x01). Y
ou can also connect it either 2 to 9 check How to program the Parallel Port for more information on thisCalculations
How to calculate the base resistor R1Relay resistance measured was 89.2 Ω
Let Vin be the Parallel port voltage when it is ON
From the Collector-Emitter loop
Calculating IB from IC
Now from the Base-Emitter loop, the Base resistor (R1) can be calculated as
My Vin measured from the parallel when it is high was 3.34V so it will be
Now from the Base-Emitter loop, the Base resistor (R1) can be calculated as
My Vin measured from the parallel when it is high was 3.34V so it will be
check this video to see how it works
Source code
#include <windows.h>
using namespace std;
typedef short _stdcall (*inpfuncPtr)(short portaddr);
typedef void _stdcall (*oupfuncPtr)(short portaddr, short datum);
int main()
{
HINSTANCE hLib;
inpfuncPtr in;
oupfuncPtr out;
hLib = LoadLibrary("inpout32.dll");
if (hLib == NULL) {
cout<<"LoadLibrary Failed.\n";
cin.get();
return -1;
}
in = (inpfuncPtr) GetProcAddress(hLib, "Inp32");
if (in == NULL) {
cout<<"GetProcAddress for Inp32 Failed.\n";
cin.get();
return -1;
}
out = (oupfuncPtr) GetProcAddress(hLib, "Out32");
if (out == NULL) {
cout<<"GetProcAddress for Oup32 Failed.\n";
cin.get();
return -1;
}
string input;
do
{
cout<<"\n type 'on' or 'off' to switch the bulb.(0 to quit) \n";
cout<<"Input: ";
cin>>input;
if (input=="on" || input=="ON")
{
out(0x378,0x01); //turn data port 2 high
cout<<"Light is ON\n";
}
else if(input=="off" || input=="OFF")
{
out(0x378,0); //send 0 to data port pin
cout<<"Light is OFF\n";
}
}
while (input != "exit" || input !="EXIT");
return 0;
}
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Download the Source Code and Driver file here
BUY GOODS ONLINE AND SHIP TO GHANA
CONTROLING 230V LIGHT BULB USING COMPUTER (PARALLEL PORT)
Reviewed by
Zakaria Mohammed
on
August 23, 2015
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