[OpenTRV-dev] Vaillant boiler issue

[Bo Herrmannsen]

remember diode over the relay coil.... EMF suppression :-D


Den 29/01/2014 kl. 21.42 skrev Damon Hart-Davis:

> OK, thanks.
> 
> That 73mA drive current may be too much for our USB supply and 3V3 regulator in particular with other loads (euch as radio RX), but it could work.
> 
> But this one would be better I think since it can draw relay power direct from the 5V USB supply which at least eliminates the regulator issue:
> 
> http://shop.ciseco.co.uk/kit-relay-board-simple-to-use-5v-operation-supports-logic-level-also-10amp/
> or
> http://shop.ciseco.co.uk/fully-built-5v-relay-board-simple-to-use-5v-operation-supports-logic-level-also/
> 
> It’s cheaper than my current SSR solution.
> 
> I’ll try it, thanks.
> 
> Rgds
> 
> Damon
> 
> 
> On 29 Jan 2014, at 19:37, Stuart Poulton <EMAIL ADDRESS HIDDEN> wrote:
> 
>> Ok.
>> 
>> Sorry missed the 12v bit try these
>> 
>> http://shop.ciseco.co.uk/kit-relay-board-simple-to-use-3v-operation-supports-logic-level-also/
>> 
>> Stuart
>> 
>> On 29 Jan 2014, at 18:54, Damon Hart-Davis wrote:
>> 
>>> Hi,
>>> 
>>> I really need to try to get one done on Monday-ish and have one in reserve, and I’m in Brussels at FOSDEM all weekend.
>>> 
>>> The board needs a 12V supply.  I may not have a suitable one to hand, so I’ll need to get one, attach to the householder’s rather crowded wall, and plug in, such a supply.  More mess and complication!
>>> 
>>> Anyhow I’ll try to order a couple of these boards now and sort the rest as a I can.
>>> 
>>> Rgds
>>> 
>>> Damon
>>> 
>>> 
>>> On 29 Jan 2014, at 18:33, Stuart Poulton <EMAIL ADDRESS HIDDEN> wrote:
>>> 
>>>> Damon,
>>>> 
>>>> Why do you need an additional PSU ? 
>>>> 
>>>> I'm happy to pitch in and solder them together, just get ciseco to ship them to me :) I'll ship them to you, how many are you talking ?
>>>> 
>>>> Stuart
>>>> 
>>>> 
>>>> On 29 Jan 2014, at 18:29, Damon Hart-Davis wrote:
>>>> 
>>>>> That’s definitely on the right lines, thanks!
>>>>> 
>>>>> Though I’d prefer not to have to assemble anything (time is pretty tight) or have another power supply, though again that can probably be worked around.
>>>>> 
>>>>> Thanks again!
>>>>> 
>>>>> Rgds
>>>>> 
>>>>> Damon
>>>>> 
>>>>> On 29 Jan 2014, at 17:34, Stuart Poulton <EMAIL ADDRESS HIDDEN> wrote:
>>>>> 
>>>>>> How about this from a nice UK based company
>>>>>> 
>>>>>> http://shop.ciseco.co.uk/kit-relay-board-simple-to-use-12v-operation-supports-logic-level-also-10amp/
>>>>>> 
>>>>>> Stuart
>>>>>> 
>>>>>> On 29 Jan 2014, at 17:15, Damon Hart-Davis wrote:
>>>>>> 
>>>>>>> Hi,
>>>>>>> 
>>>>>>> Had a chat with Vaillent tech support this afternoon and the newer models of the ecoTEC plus 837 are different to the old in that the new one is not presenting a real load 240V, ie is fairly high impedance purely for sensing, and thus will probably NOT work property with an SSR (or indeed anything self-powered for a start).
>>>>>>> 
>>>>>>> So, I have to find an alternative solution that should work for the problematic install.  It might even have to be a little logic relay board.
>>>>>>> 
>>>>>>> Small neat efficent 240VAC/DC 3V-in relay modules (mains powered) that I can sling in one of our SSR boxes (for example) would be welcome, and can then be used as an alternative in any similar situation.  We should see what OEM is using.
>>>>>>> 
>>>>>>> Rgds
>>>>>>> 
>>>>>>> Damon
>>>>>>> 
>>>>>>> 
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