Need design advice for a simple electronics project (microcontroller + wires + transistors)
€18-40 EUR / ชั่วโมง
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.
Open questions:
- 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.
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Hello. I'm a hardware engineer and PCB designer. You may check my qualification the profile I will provide scheme with BOM for your task. We can discuss any question, I believe we can have a good cooperation
Hi, I am a post graduate power electronics engineer and having very good experience in product design and development. I am excellent in embedded design & programming using pic, dspic controllers and MATLAB codding fo เพิ่มเติม
Hi I am interested to your project. I am familiar with electronics, microcontroller as well as PCB design by Eagle. Thanks.
Hello there! Hope you doing good! If you still need this to be done, be sure to contact me. Lets make something awesome! Greetings!
Hello Sir Atmega328 will be a great mcu for this use with out any shift registers it'll do the job easy and will be easy at programming for you we can build our usb communication protocol from pc to our atmega เพิ่มเติม
I have 2+years of exeperiance as an embedded developer.I have done many projects using different controllers like 8051/PIC16/PIC18/Arduino/ARM LPC2148 etc. If you will assign me this task i can do on 10 Euro/hr or a เพิ่มเติม
I have over 40 years of experience in embedded microprocessr/microcontroller design and programming. I also have a Master's in Electrical Engineering for whatever that is worth. I have been designing embedded systems a เพิ่มเติม
Respected Client, I read with interest your posting for device controller USB. I believe I เพิ่มเติม
I did my BS Engineering from Moscow Engineering & Physics University in 1995, Russia. I did my MS in Engineering Management from UET Lahore, a HEC recognized university. I have previously worked with in Micro Electron เพิ่มเติม
Dear, You can nail the project with a few useful advice. The smaller MCU with the two 74HC595 works well. The switching transistor should be PNP BJT or P-type MOSFET like IRF9540. NPN BJT as shown in your picture is no เพิ่มเติม