Am I going crazy. Please help guys.

169

01:30:17

I was playing around with 555 ICs specifically NE555 and KA555, I constructed an astable multivibrator and to my surprise it didn't work with both ICs, I replaced the resistors, capacitors, breadboard ...... after hours of trying I got bored and removed all the parts except the jumper cables and the 555 iC (Like the circuit I posted) , this is where things got crazy, when I place my finger or any thing else near the IC (3 cm) the LED at the output lit up, I thought it was loose connection or some kind of fault on the bradboard but the same thing happened on othe breadboard and other ic, I really don't know WTF is going on here, so please help guys

published 10 years ago

Addramyrz

10 years ago

Lets gets a youtube video so we can see your superpower. ;0)

josipq

10 years ago

Wrong shematic

rich11292000

10 years ago

Floating terminals will become antennas and receivers??? Check voltage.

mhassen007

10 years ago

I was using a toroid with large winding, maybe the field destroyed'em.... maybe!!!

darrhunt

10 years ago

Resistor or resistors and capacitor needed first of all. Study some working 555 circuits.

avid0g

9 years ago

I must agree with Rich11292000, your body, the power supply, or both have significant AC Voltage. The 555 inputs are high impedance Op Amp / Comparator. Picks up enough voltage to cycle the chip through both output states.

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