Archive for the 'USB' Category

RoboPIC 18F4550 made for STEM Education in Electronics & Robotics

Wednesday, February 24th, 2016

I am happy to announce RoboPIC 18F4550 Mikronauts new development board for STEM education in Robotics and Electronics.

RoboPIC 18F4550 Robot controller @ https://Mikronauts.com
(click here for larger image)

I designed RoboPIC 18F4550 to be easy to assemble and use with ANY single board computer, laptop or full size PC.

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For more details, please see the RoboPIC 18F4550 product page.

If you would like to discuss RoboPIC 18F4550, please join our forums.

School, reseller and distributor inquiries are welcome!

Banana Pi & Pro SATA and USB Hard Drive Tests and experiments

Sunday, March 8th, 2015

Did you even wonder if the SATA port on a Banana Pi, and a Banana Pro makes a difference?

Banana Pi & Banana Pro SATA and USB Hard Drive experiments @ https://Mikronauts.com

(click on image for larger version)

Is it really that much faster than USB-SATA converters (like the ones needed for the Raspberry Pi)
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I decided to find out, comparing an SD card, USB-SATA adapters, and SATA drives on a Banana Pi and a Banana Pro.

There are four drives competing here… a 5400rpm laptop drive, a 7200rpm 3TB desktop drive, a slow SSD and a fast SSD.

See https://www.mikronauts.com/banana-pi/banana-pi-pro-sata-and-usb-hard-drive-tests/

Raspberry Pi 2 USB hard drive and adapter tests article posted

Thursday, February 26th, 2015

I test two SSD’s, two hdd’s, and four USB2&3 adapters in order to find out how USB drives perform with an Raspberry Pi 2!

https://Mikronauts.com Raspberry Pi 2 USB hard drive and adapter tests

(click on image for largerversion)

I was pleasantly surprised with the test results. Click on the link below for the tests, results, and analysis.
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Raspberry Pi 2 USB hard drive and adapter tests

Article Index

  1. Introduction, Test Equipment, Software Setup, Benchmarks, hdparm
  2. dd Read, dd Write, dd Copy, Conclusion

FTDI USB to Serial chips

Saturday, December 30th, 2006

I was playing with one of my FTDI FT232R USB to serial converter chips last night. Really nice device. Not only does it have a serial port that will run at up to 3mbps, but it has a full set of handshaking lines; and any of the eight serial port lines can optionally be inverted.

If that was not enough, it has five additional I/O bits, four of them can be used as general purpose I/O, or be assigned one of many alternate functions – including outputting a 6/12/24/48 MHz clock! It also has a “bitbang” mode that I will explore later.

You can also use it to draw power from the USB cable, and power the electronics you attach to the FT232R – mind you, you really should not draw more than about 70mA from the USB cable to leave plenty of power for the chip.

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You can read more about the FT232R HERE.