ahmedragia21
Member
I'm trying to design a product that have the following features for mass production, and I'm asking from your experience, how to get the lowest price for the components, quality of the chips in terms of stability due to temperature ( it must work in temps over 40+c )
1. I would like to control a 27 7-Segment display, which way to go ? just connect lots of switch transistors, and give them one data lines ? or there are easier ways, dedicated chips, with low price ? I have checked the MAX7219, but it's price is around 11$, that's so expensive for me.
2. I would like to be able to read and play MP3 files, and also some other files, so I'm sure I would like to have an SD-Card
3. I need also a RTC
4. RF control ability
5. On power failure, I would be able to use another battery, power monitoring ?
6. Debugging Keys + LCD
So what would be the best uC for those purposes in terms of stability, money,..etc ?
For each item, what would be your choice for the design ? or do you know a kit that has most of these features and tried it ?
I have been away from the Electronics industry since 2008, and I mostly need help to refresh my memory.
1. I would like to control a 27 7-Segment display, which way to go ? just connect lots of switch transistors, and give them one data lines ? or there are easier ways, dedicated chips, with low price ? I have checked the MAX7219, but it's price is around 11$, that's so expensive for me.
2. I would like to be able to read and play MP3 files, and also some other files, so I'm sure I would like to have an SD-Card
3. I need also a RTC
4. RF control ability
5. On power failure, I would be able to use another battery, power monitoring ?
6. Debugging Keys + LCD
So what would be the best uC for those purposes in terms of stability, money,..etc ?
For each item, what would be your choice for the design ? or do you know a kit that has most of these features and tried it ?
I have been away from the Electronics industry since 2008, and I mostly need help to refresh my memory.
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