[Ovmsdev] Brake light control (was Re: Prototyping expansion board)

Sun Apr 21 01:32:44 HKT 2019

JP1 pin 1 (+3.3) ----- [ 680 Ohms ] ---+--- [ LED ] ----- pin 28 (GND)
                                       |
                                    pin 12 (EGPIO_8)

I can connect a 680Ohm resistor first end to pin1, a second end to pin12,
and the led positive side to pin12 and negative to pin28(gnd). Now I have
only 470ohm resistor at home, I tested now with a 4V li-ion battery and my
red led power is 4mA. I can use this (470Ohm) resistor or buy a 680Ohm.
Tomorrow I remove the OVMS module from my car, and create some test, if the
resistor (470Ohm) is OK.
I used this calculator for led series resistor calculation (I used a red
Led): http://ledcalc.com

Michael Balzer <dexter at expeedo.de> ezt írta (időpont: 2019. ápr. 20., Szo,
11:16):

> Be aware the MAX71317 outputs are open drain, so you need a pull up
> resistor to e.g. +3.3. According to the data sheet, the current should stay
> below 6 mA.
>
> I've just done a quick test wiring like this:
>
> JP1 pin 1 (+3.3) ----- [ 680 Ohms ] ---+--- [ LED ] ----- pin 28 (GND)
>                                        |
>                                     pin 12 (EGPIO_8)
>
> Works as expected.
>
> Regards,
> Michael
>
>
> Am 19.04.19 um 09:59 schrieb Michael Balzer:
>
> Sure.
>
> You need to route an EGPIO line to the DA26 port. For a first test you can
> add a simple jumper on expansion port pins 10/12 to route EGPIO_8 to GEP_7
> (= pin 21 on DA26).
>
> You should then be able to use the "egpio" command to test your LED.
> EGPIO_1 … _8 labels correspond to MAX7317 ports 2 … 9, so to control
> EGPIO_8, do:
>
> OVMS# egpio output 9 1  # EGPIO_8 on
> OVMS# egpio output 9 0  # EGPIO_8 off
>
> (correct me if I'm wrong, Mark)
>
> I wasn't aware there are other cars in need of something like this. I'll
> think about adding the logic as an option to the vehicle framework, but I
> can send you some patch to test this on your i-MiEV/clone first.
>
> Regards,
> Michael
>
>
> Am 19.04.19 um 09:24 schrieb Tamás Kovács:
>
> I can add for testing a simple led (with resistor) , same as SimpleConsole
> (twizy OVMS V2), to show car is recuperating, connected to DA26 external
> expansion port?
>
> Michael Balzer <dexter at expeedo.de> ezt írta (időpont: 2019. ápr. 19., P,
> 9:17):
>
>> As the Mitsubishi code also reads battery current/power level from CAN,
>> it would be trivial to add the same logic there.
>>
>>
>> Am 19.04.19 um 06:52 schrieb Tamás Kovács:
>>
>> The Trio (Mitsubishi I-Miev and clones) does not activate the brake light
>> on recuperation on 2105 and older models, if this is work is very
>> impressive.
>>
>> Michael Balzer <dexter at expeedo.de> ezt írta (időpont: 2019. ápr. 18.,
>> Cs, 23:08):
>>
>>> 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>
>>> 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>
>>> 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>
>>> 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> 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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>>>
>>>
>>> --
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>>
>>
>> --
>> Üdvözlettel:
>> Kovács Tamás
>>
>> _______________________________________________
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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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>
>
> --
> Üdvözlettel:
> Kovács Tamás
>
> _______________________________________________
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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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-- 
Üdvözlettel:
Kovács Tamás
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