Repost: 2017 DIY-More board for encoders

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Joined: 15 Feb 2018, 23:32

Repost: 2017 DIY-More board for encoders

Post by Phil_G »

Reposted from 2017: The DiyMore 328P board:

1) This board appears now to have been completely replaced by the 2018 'Pro Mini Strong' board.
2) The mods listed in this post do not apply to the similar-looking Deek-Robot board!

Recently (2017) a variation of the 328P board has been supplied, for us its a better board and whilst at a quick glance it looks identical, its easily identified by the tiny Through-Plated-Hole (TPH) adjacent to the Vcc (+5v) pin:


This one has proven to be the best option for encoder projects as it allows the three encoder connections to be made directly to the end header using a servo plug. The DiyMore is the one with the tiny TPH hole near Vcc (+5v) on the end header.

As with the Deek-Robot 328P board, the PPM output needs to be configured onto D0.
It needs a couple of simple mods, first the schottky diode is removed.
This is much easier before the headers are fitted:


Removing the diode isolates the 5v pin on the end header so that we can use it for the battery supply to the RF module. There are two ways to do this, either using a short wire bridge like this:


… or by soldering a short wire bridge from the old schottky pad to the 4 ohm resistor.
This is my preferred method even if its a bit more fiddly:

The RF module connections for the DiyMore board are as follows, of the 5 pins, two are for battery switched positive and negative, and three are pos, neg and PPM for the RF module. PPM is on the pin labelled RX1 which is actually D0, of course this also needs to tally in the sketch – static int ppm = 0
The remaining 3 holes are unused.
This is where the DiyMore is much neater than the Deek-Robot board which needs a separate pos supply for the module. A servo lead can be fitted to the module so it plugs straight into the encoder, really neat & flexible:


Note that in common with the Deek-Robot 328P board, A4 and A5 are interchanged on the board silk-screen
annotation. Be careful not to confuse these two 328P boards, the Deek-Robot and DiyMore versions look similar but are routed completely differently. Be sure to use the appropriate mods for your board type.

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Joined: 16 Nov 2018, 07:34

Re: Repost: 2017 DIY-More board for encoders

Post by HiLo »

Hey Phil,

You just cleared up an issue with getting I2C to work on the old DIY More pro mini expand, in that A5 & A4 board silk-screening should be swapped.
Phil_G wrote:"Note that in common with the Deek-Robot 328P board, A4 and A5 are interchanged on the board silk-screen,
and on the DIY- More 'Strong' that we're currently using, A4 & 5 are straight but D0 and D1 are transposed :D"

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