[Ovmsdev] Prototyping expansion board

[Michael Balzer]

Mark,

that looks very good. Not sure about general demand, but I think we should have this to enable simple custom hardware I/O extensions.

For the Twizy, I was thinking about adding logic to control the brake light from the module. The Twizy does not activate the brake light on recuperation, as
that's normally (untuned) not very strong. But a tuned Twizy allows one pedal driving, so needs this.

Looking at our case I also think one custom extension board should fit on top of the modem.

Regards,
Michael


Am 18.04.19 um 02:36 schrieb Mark Webb-Johnson:
> It seems the attachments were messed up, so attaching again…
>
> Regards, Mark.
>
>
>
>
>
>> On 17 Apr 2019, at 10:07 PM, Mark Webb-Johnson <mark at webb-johnson.net <mailto:mark at webb-johnson.net>> wrote:
>>
>>
>>     Design layout. Looks good to me, but open to suggestions...
>>
>>
>>     We can make in sets of three PCBs, to keep prices down.
>>
>>
>>     Regards, Mark
>>
>>
>> On 8 Apr 2019, at 12:05 PM, Mark Webb-Johnson <mark at webb-johnson.net <mailto:mark at webb-johnson.net>> wrote:
>>
>>>
>>> A kit of 5 PCBs + SIP edge connectors + mounting hardware, unsoldered, would be about US$15 + shipping. About US$3/board set. With shipping I don’t think
>>> this is worth doing with less than 3 or 5 boards per kit.
>>>
>>> Would this be useful?
>>>
>>> Regards, Mark.
>>>
>>>> On 7 Apr 2019, at 9:08 PM, Mark Webb-Johnson <mark at webb-johnson.net <mailto:mark at webb-johnson.net>> wrote:
>>>>
>>>> This is the closest we have today:
>>>>
>>>> <image1.jpeg>
>>>>
>>>> That is a bare modem board, with just the sip connectors. The prototype above is a K-line transceiver.
>>>>
>>>> I think it would be trivial, and cheap, to make up what you show. Perhaps just solder ready pads at 0.1” pitch, then the side sip connectors wired to the
>>>> first row of pads at each edge. Perhaps 5 PCBs in a kit, with sip edge connectors, unsoldered, in a simple plastic bag.
>>>>
>>>> Does that sound like something useful? If so, I can ask the China guys for some idea of pricing. If it is just the unsoldered pcbs + parts, I don’t think
>>>> it will be expensive.
>>>>
>>>> Regards, Mark
>>>>
>>>> On 7 Apr 2019, at 4:38 PM, Michael Balzer <dexter at expeedo.de <mailto:dexter at expeedo.de>> wrote:
>>>>
>>>>> Mark,
>>>>>
>>>>> do you know of some kind of prototyping board available that fits to our piggy back expansion layout?
>>>>>
>>>>> Something like this: https://www.robotshop.com/de/de/cytron-arduino-proto-schild.html
>>>>>
>>>>> Regards,
>>>>> Michael
>>>>>
>>>>>
>>>>> Am 03.04.19 um 06:48 schrieb Mark Webb-Johnson:
>>>>>>
>>>>>> If you have work to do on this DA26 expansion ports, this is pretty cool and well built:
>>>>>>
>>>>>>     https://www.aliexpress.com/item/26-Pin-D-SUB-DB26-3-Rows-Serial-Parallel-Port-Serial-Shellless-Male-And-Female-Connector/32886738786.html?spm=a2g0s.9042311.0.0.20924c4dg34EEU
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
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>>>>>
>>>>> -- 
>>>>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
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-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

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