max_crack
Member
- Joined
- Jan 4, 2016
- Messages
- 19
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Hello,
I though I would share my current project. There are plenty of altimeters and what not and it would be cheaper and easier just to buy one already done. But I like doing layouts while i'm stuck on conference calls.
So far I got a AVR Atmega MCU, SPI barometer, and flash for storage. I have an aux SPI port that I can read other sensors with. Looking at 6 or 9 DOF SPI/I2C accelerators / gyroscopes, they tend to have very poor bandwidths but it something to experiment with.
The build in ADC is also tied out to a header so I could also use analog sensors if I wanted to get into serous $.
Power is simple, only tricks here is a big storage cap and blocking diode. If the power browns out while firing an ignitor hopefully the it keeps the micro up and running. On the firmware side if write the code to be a bit statefull is should be able to recognize if the power did brown out and do some thing about it.
The ignitor outputs are pretty basic Just a fet to ground. Just typing this out though I think I could support using higher voltages if i protect the MCU's continuity tester inputs... Hmmmmmmm....
I though I would share my current project. There are plenty of altimeters and what not and it would be cheaper and easier just to buy one already done. But I like doing layouts while i'm stuck on conference calls.
So far I got a AVR Atmega MCU, SPI barometer, and flash for storage. I have an aux SPI port that I can read other sensors with. Looking at 6 or 9 DOF SPI/I2C accelerators / gyroscopes, they tend to have very poor bandwidths but it something to experiment with.
The build in ADC is also tied out to a header so I could also use analog sensors if I wanted to get into serous $.
Power is simple, only tricks here is a big storage cap and blocking diode. If the power browns out while firing an ignitor hopefully the it keeps the micro up and running. On the firmware side if write the code to be a bit statefull is should be able to recognize if the power did brown out and do some thing about it.
The ignitor outputs are pretty basic Just a fet to ground. Just typing this out though I think I could support using higher voltages if i protect the MCU's continuity tester inputs... Hmmmmmmm....