GreenPill board specification

Generic boards that are not Maple or Maple mini clones, and don't contain the additional USB reset hardware
Ollie
Posts: 183
Joined: Thu Feb 25, 2016 7:27 pm

Re: GreenPill board specification

Post by Ollie » Mon Jan 02, 2017 4:58 pm

We should follow the Teensy model, where the "low cost" 3.2 is compatible with the "high performance" 3.5/3.6 boards. In other words, do a very compact and low cost F103 color pill so that a pin compatible F4xx color pill can be designed for more pins, higher functionality and higher performance. As a rule of thumb both F1 and F4 pills should avoid all extra cost and size to keep the price at $2 and $5 range.

I would not mind to have Teensy 3.5 or 3.6 as a reference design for F4 color pill.

The reason that the F4 development boards are around and over $10 are low volumes and extra functionality.

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Squonk42
Posts: 70
Joined: Thu Dec 29, 2016 9:25 am
Location: Bordeaux, France

Re: GreenPill board specification

Post by Squonk42 » Mon Jan 02, 2017 10:18 pm

I agree with @Ollie:
  • a low cost STM32F103C8T6 like the current Blue Pill but with any enhancements that does not raise the cost above $2 (WW shipping included!)
  • a high end STM32F303CBT6 that would bring M4 core + FPU and DSP, more RAM/Flash, 4x 12-bit fast ADCs, 2x 12-bit DAC, more timers, PGAs, etc. in a compatible LQFP48 package @ $5 (also WW shipping included)
Maybe an option with and without pins like the Teensy for people with absolutely zero soldering skills?

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Squonk42
Posts: 70
Joined: Thu Dec 29, 2016 9:25 am
Location: Bordeaux, France

Re: GreenPill board specification

Post by Squonk42 » Mon Jan 02, 2017 10:34 pm

The hardest problem is not the board definition, though... It is to find a (Chinese) company ready to make these boards at these low prices :?

The only possibility would be to get in touch with one of the original RP/BP manufacturers and propose a list of enhancements that could either increase their sales and/or margins significantly because of differentiating features and/or lower BOM costs.

Someone living in Shenzhen in this forum ready to accept this mission? He/she would receive the highest consideration from the community!

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