No Resistor from the 555 to the Base of the Transistor? How hard do you want to turn that poor Transistor on? If you disconnect pin 3 on the 555 and still have your 7805 (they DO need a heatsink) overheating, then you've damaged your 555.
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No Resistor from the 555 to the Base of the Transistor? How hard do you want to turn that poor Transistor on? If you disconnect pin 3 on the 555 and still have your 7805 (they DO need a heatsink) overheating, then you've damaged your 555.
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