i mean wiring i attached is like and same ?

But connection i understood to be done with breadboard/perf board is right as per my understanding ?

I found diod to be attached to relay or any coil where back emf is to be protected from going to circuit and for that i found attached circuit everywhere but i think physical connection is like this for attached relay diagram.

See attached one and then let me know that i understood ok or not please.

Does this is like this ? +6V --> Diod ( ---| ) --> Relay Coil A point and Relay Coil B goes to ground or goes to circuit where it is required ?

Dear juanps90,

you got my point, i wanted is exactly, using all functions of arduino with perfboard, i got now that i can use it.

Thanks for answer

Try this link http://www.csgnetwork.com/transistorcalc.html

This link might help you http://www.csgnetwork.com/transistorcalc.html

Actually i was trying with relay but because it was not working and DC motor from friend came handy, i instantly try with that !!! i was trying to on relay of 6VDC (Sun HOLD - RAS0610) but somehow it was not working and hence try the DC motor and was totally un-aware about Amphere it was consuming as even my wall-wart DC converter is 500mA max output !!!

So my relay 6VDC/7A with coil resistance of 103 Ohm will work with the same circuit ...?

xpleria : I think you pointed rightly, my DC 12V/200R motor is using more than 200mA as mine DMM cant measure more than 200mA so can't figureout actual current it is taking and i might have burnt my transistor as when i power CE motor works so i think it might be shorted... ( I measured it with 10A max setting and it is taking 1.75 A !!!)

Will try with another one and BC547 is B type... True... three lines written as BC, 547B, J5 E i do not understand what that lines was till you pointed out...

Thanks

when i connect power to pin 1, nothing to Base and ground of motor to pin 3 motor works does it mean that BC547 is shorted or not working ?

Members,

Please help me out for my PIR Sensor example where i do make PIN 13 of Arduino Uno R3 HIGH when i get signal from PIR from Digital pin 2. LED works fine but when i attach BC547 with 4.7K registor to base pin of BC547, +V12 to Motor and Ground of Motor to Collector pin, and Emitter to Ground as per attached image and fritzing layout.

With same circuit, my LED get powered on but motor is not. I know i'm making something wrong but not able to find out where.

Please help me to make my DC motor run or energize my Relay ....

Sorry i'll try to put in new thread....

Thanks for advise and reading that site for more knowledge so that i can find out ways myself as much as possible with me.

Sorry again for wrong way of getting help.

and even more information can be got from googling or www.DataSheets.com

Try www.DataSheets.com for more in-depth details and comparision of parts etc...

Off-Topic :

I have created stand-alone board for ATMega328P-PU with bootloaded arduino and LED Blink example. It worked fine and now wanted to know that, like i attached LED to pin 13 or 20 of chip as per mappings of pin, I just want to know that, is it usable like arduino board say i can connect LDR like i'm attaching it to pin 11 or arduino with mapped pin of chip or anything more care must be taken if i want to use stand alone on perf board version ?

I'm not sure so asking about usage of pins as per arduino board or i'm missing a lot ?

Say i want to attach HC-SR04 ultrasonic sensor which requires 5V as Vcc but i'm not sure and not written in it's manual that how much current it may needed, will it work with any pin of ATMega328P-PU chip ?

So simulIDE works with creating circuit and load firmware or just arduino .ino file ? i'm unable to download paulware ...