Hi
I would like some comments on my attached schematic, it is for a digital dashboard for a car. I understand digital electronics, but analogue stuff kills me.
The circuit has to run in a car, which im told is very electrically noisey, what changes if any would i need to make for this.
The dip switches in the circuit make up a 6 bit ladder type thing (R10-R15), am i right in thinking that if i read the output from this, as an analogue voltage, i SHOULD be able to decode it into what switches were set, and which ones unset.
The inputs to the circuit are 12v (well about 14.2 with the engine running), are the resistors - for example R1, R2, and R7 ok for reducing the voltage/current reaching the PIC?
Are there any other hardware related problems that you can see in the schematic, or that you would foresee with the project?
I like to try and do things myself, and usually succeed, with my breadboard ect, but this will be my first project that i will be producing on a properly manufactured PCB. (anything i should be careful with here for example component location or track placement?)
Sorry about so many questions, but if you have any for me, please ask.
i can provide any additional info you need to help me.
best regards
graham
I would like some comments on my attached schematic, it is for a digital dashboard for a car. I understand digital electronics, but analogue stuff kills me.
The circuit has to run in a car, which im told is very electrically noisey, what changes if any would i need to make for this.
The dip switches in the circuit make up a 6 bit ladder type thing (R10-R15), am i right in thinking that if i read the output from this, as an analogue voltage, i SHOULD be able to decode it into what switches were set, and which ones unset.
The inputs to the circuit are 12v (well about 14.2 with the engine running), are the resistors - for example R1, R2, and R7 ok for reducing the voltage/current reaching the PIC?
Are there any other hardware related problems that you can see in the schematic, or that you would foresee with the project?
I like to try and do things myself, and usually succeed, with my breadboard ect, but this will be my first project that i will be producing on a properly manufactured PCB. (anything i should be careful with here for example component location or track placement?)
Sorry about so many questions, but if you have any for me, please ask.
i can provide any additional info you need to help me.
best regards
graham
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