[PSUBS-MAILIST] SEMjr - DIY Electronic Project

[Jon Wallace via Personal_Submersibles]

 Hi Philippe, where did you order them?  I got mine at JLCPCB.
Jon


    On Wednesday, December 30, 2020, 11:10:04 AM EST, Philippe Robert via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Hi all,
I just received the PCB this morning. Very good quality PCB for the price. 


Le mar. 22 déc. 2020 à 10:06, Philippe Robert <phelop at gmail.com> a écrit :

Ok Nice ! So the the SEMjr with the teensy can be very expendable. I didint realise the power of the teensy. 
Le lun. 21 déc. 2020 6 h 52 p.m., Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> a écrit :

 Philippe,
I chose Teensy for this project because it offered the biggest "bang for the buck" in terms of functionality and performance.  Teensy 4.0 has a 32bit-600 mhz processor whereas the Arduino line is limited to 8bit-16mhz processors.  The footprint was important, but of course something like the Arduino Nano also has a small footprint.  However, the Teensy packs so much more functionality in it's footprint, 7 serial lines, 3 SPI lines, 3 I2C lines, even 3 CANBUS lines.  The Nano has only 1 Serial, 1 SPI, and 1 I2C.  So for the same footprint, the Teensy easily dwarfs something like the Nano in terms of functionality and performance.
Now, I could make the argument that this type of project really doesn't require a 32 bit - 600 mhz processor, and I could have implemented Software Serial to get the additional serial lines I needed from the Nano, but that would have minimally complicated the coding and also consumed many of those limited 16mhz cpu cycles to run the additional code.
The bottom line is that using the Teensy just made everything easier to implement.  The only weakness of the Teensy, if there is one, is that you have to install Teensyduino on top of the Arduino IDE in order to use the Arduino IDE to load and program the microprocessor.  However, it really is a seamless installation and only required once.  It's not much overhead considering all the Teensy hardware offers.
Jon


    On Monday, December 21, 2020, 05:58:41 PM EST, Philippe Robert via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Thank Jon for sharing your work !
I have a question about the Teensy 4.0 microprocessor. What is the benefit to use the teensy instead of arduino Atmel based microcontroller ? 
Regards
Philippe

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