[TriEmbed] Driving 32 5v relays

[Rodney Radford]

Everyone is trying to help, and that is good, but please look at the specs
of this board, which is what he already has:

http://yourduino.com/sunshop2/index.php?l=product_detail&p=156

It has both transistors and opto-isolators, ready to go... ;-)

It is active low, so all that needs to be done to turn on a relay is to
provide a ground path for the LED to sink the couple milliamps (1k resistor
in series with the LED and connected to 5v supply).

On Thu, Jul 16, 2015 at 5:04 PM, Robert Gasiorowski <rgresume at gmail.com>
wrote:

> If you already have relay boards with transistor driver, then all you need
> is weak driver like 595.
> If you have relays only, then I would suggest using high current version
> of 595, TPIC6C595 (or higher current B595 & A595)
> No need for opto-isolators if you use flyback diodes.
>
> Rob.
>
> On Thu, Jul 16, 2015 at 4:53 PM, Rodney Radford via TriEmbed <
> triembed at triembed.org> wrote:
>
>> Keep in mind he has already purchased the relay board that includes the
>> opto isolation and transistor drive... so to do anything else involves
>> additional money for a new solution.
>>
>> What he has is definitely good enough... no reason to buy anything
>> different
>>
>> On Thu, Jul 16, 2015 at 4:48 PM, John Vaughters via TriEmbed <
>> triembed at triembed.org> wrote:
>>
>>> >I am with Rodney on the opto-isolation relay board as the best solution.
>>>
>>> Small change: Opto-isolated triacs or the opto-isolated relay board.
>>> Kind of a toss up, I would probably break the tie on cost or convenience of
>>> the choices.
>>>
>>> John Vaughters
>>>
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>>
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