I need some design advice for my first electronics project:
The goal is to control the power supply of the indidual bays of a hard drive backblane.
[[ See attached image first ]]
The MCU should control 15 identical switches.
Communication between the MCU and the host PC should happen via USB.
USB should also be be used for the power supply.
The whole design should be optimized for minimum power consumption.
Min. 2 extra output pins of the MCU should kept unused to allow for future extensions.
- What's a suitable MCU?
Maybe a Digispark (ATtiny85) with two cascaded 74HC595 shift registers to achieve the
required number of output pins?
Or maybe another ATtiny with more native output pins like the ATtiny4313?
Are there any suitable minimalistic, Digispark-like ATtiny development boards with more
output pins and USB support?
- What's a suitable transistor?
I'd like to buy and assemble the parts by myself.
I'd also like to do the programming.
23 freelancere byder i gennemsnit €28/time for dette job
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