[PSUBS-MAILIST] SEMjr - DIY Electronic Project

[Philippe Robert via Personal_Submersibles]

Hi all,

I just received the PCB this morning. Very good quality PCB for the price.

[image: PCB.jpg]

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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>>
>
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