As an apprentice engineer i have an electronics project that has to be something to do with something automotive.
I have chose to do a 0-60 / 0-100mph timer. I have not thought about the circuit properly yet, but i know roughly what i have in mind.
The way i am going to have it operate is by picking up from the speedo (may not be a micra, may not be a car, may use a signal generator to replicate the pulse) when the first pulse is sent to the speedo (when the car starts moving) the timer will start, when the pulse reaches a certain frequency (the frequency @ 60/100mph) the timer will stop.
What i need to know is what the frequency of pulses the speedo recieves at the given speeds? Does anyone know this or know how to work it out?
Many thanks
I have chose to do a 0-60 / 0-100mph timer. I have not thought about the circuit properly yet, but i know roughly what i have in mind.
The way i am going to have it operate is by picking up from the speedo (may not be a micra, may not be a car, may use a signal generator to replicate the pulse) when the first pulse is sent to the speedo (when the car starts moving) the timer will start, when the pulse reaches a certain frequency (the frequency @ 60/100mph) the timer will stop.
What i need to know is what the frequency of pulses the speedo recieves at the given speeds? Does anyone know this or know how to work it out?
Many thanks