facefirst35
Coast to Coast
Re: '75 CB550K Gulf - plugs, plugs, plugs
Very very nice!
Very very nice!
Dale said:Interesting system. Wonder if you could make it electronically adjustable?
crazypj said:I know there is a LOT of misinformation on most of the GSX-R sites
Swagger said:Truth is the needed signal could even be 5v which is typical in digital circuits and likely what most of the ECU runs on as well internally.
First thing you should do is find out if it still works at 5v, cooking the valve internal to the unit would be bad. If it works (turns on for lack of a better term) then you should think about running it there for longevities sake.
Sonreir said:It's actually not that bad. You can use your potentiometer in place of R1 in this circuit and that will allow you vary the pulse frequency as you ride. Your capacitor should be 1µF for this application and hopefully your pot has a fully off position (usually feels like a click when your turn it fully counter-clockwise).
You'll need an LM7805 voltage regulator to control the voltage going to the LM555 and the output pulse (pin 5) from the 555 should connect to a mosfet or darlington transistor to toggle the +12V going to the dampener (TIP120 is cheap and should fit the bill). You'll want a heatsink for the voltage regulator and for the TIP120.