I currently have blown my 555 timer chip that flashes 2 Led's. It works fine from a 9v battery, but burns up when using a 9v 1.5a (1500ma) wall adapter.
The kit I have comes with the following:
555 timer
33k ohm resister
120k ohm resister
4.7 MFD capacitor
2 Led's
9v battery snap.
I want to change the 9v battery to the wall adapter without burning up the timer or board. I know the 555 timer chip maxes out at 200ma. I thought the circuit board with the 555 chip would only draw what it needs, but I keep burning them out when hooked up to my 9v wall adapter. What could I add to keep this from happening?
The kit I have comes with the following:
555 timer
33k ohm resister
120k ohm resister
4.7 MFD capacitor
2 Led's
9v battery snap.
I want to change the 9v battery to the wall adapter without burning up the timer or board. I know the 555 timer chip maxes out at 200ma. I thought the circuit board with the 555 chip would only draw what it needs, but I keep burning them out when hooked up to my 9v wall adapter. What could I add to keep this from happening?