Hey everyone, first post here!
So the problem i am trying to find a solution for. I am doing a 6 speed manual transmission swap and it is fitted with a 12v reverse lockout solenoid. In an oem application this is triggered by the vehical speed which is what i am trying to replicate. I am yet to probe the vehicals speed output with my scope to see exactly what it's doing but as far as i can tell looking at the service manual the abs module outputs a 5v square wave at varying pulse width depending on vehical speed. What i am wanting to do is design a circuit the will trigger a relay coil that can switch 12v to the solenoid when the square wave is at 0v (vehical not moving) and switch the solenoid off as soon as a 5v signal is present (vehicle moving). I also need to effectively decouple the sqaure wave signal from whatever i design as the signal needs to remain "clean" or it has the potential to cause a whole host of issues with the vehicals abs, speedometer etc. There are a few ways i have thought about going about this such as the use of optocouplers but this one has me a little confused on what to do
So the problem i am trying to find a solution for. I am doing a 6 speed manual transmission swap and it is fitted with a 12v reverse lockout solenoid. In an oem application this is triggered by the vehical speed which is what i am trying to replicate. I am yet to probe the vehicals speed output with my scope to see exactly what it's doing but as far as i can tell looking at the service manual the abs module outputs a 5v square wave at varying pulse width depending on vehical speed. What i am wanting to do is design a circuit the will trigger a relay coil that can switch 12v to the solenoid when the square wave is at 0v (vehical not moving) and switch the solenoid off as soon as a 5v signal is present (vehicle moving). I also need to effectively decouple the sqaure wave signal from whatever i design as the signal needs to remain "clean" or it has the potential to cause a whole host of issues with the vehicals abs, speedometer etc. There are a few ways i have thought about going about this such as the use of optocouplers but this one has me a little confused on what to do
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