Worst case senario...... 56 ohm shorting 9V rail.... no LED's and no transistor..... 9V / 56Ω = 161mA... Therefore... 9V * 161mA = 1.45Watts.. Even on a heat sink it will be okay..
LED's will give about 1.8v drop so 7.2V / 56Ω = 128.5mA... 7.2V * 128.5mA = 925mW....
I think you have something wired wrong.....
LED's will give about 1.8v drop so 7.2V / 56Ω = 128.5mA... 7.2V * 128.5mA = 925mW....
I think you have something wired wrong.....