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SOFT SWITCH USING NE555

Other Parts Discussed in Thread: NE555

I design soft switch for my design my design need 1.5A, I'm using NE555 the problem that I face is when my design draw 100mA the circuit is work correctly but when my design draw 1A the output of NE555 stay high and never go low. I have used two different circuit but it doesn't work.

 

but this circuit work correctly I don't now why

  • Ahmad,

    I suspect that you want SW1 press to toggle output state. However a longer press should oscillate. Due to the large output current change, it is important to to have a bypass caps on pin 8 and pin 5 (to pin1, ground). 0.1uF is good bypass value.