I am trying to find a circuit for a seven segment display driven by varying dc voltage from a motorcycle gear position sensor.
It needs to be very compact as is the GIpro gear indicator oon the market. By all accounts it seems that the brains of the display driver is no bigger than the display itself.
Thanks I have seen the 4511 decoder but from what I understand about it I still need to convert the analog signal from the motorbike into a binary code??
Thanks I have seen the 4511 decoder but from what I understand about it I still need to convert the analog signal from the motorbike into a binary code??
That's what an ADC is for. You'll need to do some homework if you expect to be able to use one though. They're not that difficult really, but you need to understand what you're doing with them. Also you'll probably need to do some signal conditioning such that your analog output fits within the "window" of the ADC input.
That's what an ADC is for. You'll need to do some homework if you expect to be able to use one though. They're not that difficult really, but you need to understand what you're doing with them. Also you'll probably need to do some signal conditioning such that your analog output fits within the "window" of the ADC input.
The range of volts is 1-5DC. Can you suggest a link that will show me "signal conditioning" ? I have been searching everywhere and although I can find lots of technical talk on ADC there is nothing in laymens terms or a basic explanation of how to generate the required binary output (that I can understand anyway).
e.g. how do you create the required binary from the ADC to meet the seven segment decoder requirements? is it software or simply input voltage?
Signal conditioning is fairly simple - you just use Op-Amps. Gain can be used to make the signal bigger if it's too small or smaller if it's too big. Then addition / subtraction can be used to "shift" the signal up or down (alter it's D.C. level) such that it fits as tightly as possible into the window of the ADC. Are you familiar with the use of Op-Amps? Do a bit of research and see what you can find out. If you're still stuck, come back and I'll post some example circuits that you can alter to suit your requirements.
matt_hau said:
e.g. how do you create the required binary from the ADC to meet the seven segment decoder requirements? is it software or simply input voltage?
hi had the same idea for my college project but using the current from the coil to convert into binary is too complex i thought of using infrared sensors and making my circuit simple and then using pic axe to write a program do u kno were to get a circuit diagram of the project????
hi had the same idea for my college project but using the current from the coil to convert into binary is too complex i thought of using infrared sensors and making my circuit simple and then using pic axe to write a program do u kno were to get a circuit diagram of the project????