Looking for 4-channel optocoupler/isolator board recommendations
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Volatile Compound
Apr 12, 2023, 1:41:50 AM4/12/23
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This is the sort of thing that would be ripe for laying out in KiCAD or
similar, but it seemed to be worth checking if what I'm looking for
already exists before going that route.
Electrical specs: 5VDC, 250mA peak. No level conversion necessary or
wanted. Should be able to handle digital signals bidirectionally on all
four channels at up to, say, 9600bps.
Something like the SparkFun Opto-isolator Breakout
(https://www.sparkfun.com/products/9118) would probably work, but it's
only a 2-channel board. Using multiple boards isn't practical in this
case due to physical space limitations.
I've been looking at the TLP281- / ILD213T-based breakouts on Amazon and
elsewhere, but there's evidence to suggest that they have off delays of
around 30usec. That will really screw with (if not outright break) the
timing of the signals going across the board.
Any recommendations?
- skroo.
similar, but it seemed to be worth checking if what I'm looking for
already exists before going that route.
Electrical specs: 5VDC, 250mA peak. No level conversion necessary or
wanted. Should be able to handle digital signals bidirectionally on all
four channels at up to, say, 9600bps.
Something like the SparkFun Opto-isolator Breakout
(https://www.sparkfun.com/products/9118) would probably work, but it's
only a 2-channel board. Using multiple boards isn't practical in this
case due to physical space limitations.
I've been looking at the TLP281- / ILD213T-based breakouts on Amazon and
elsewhere, but there's evidence to suggest that they have off delays of
around 30usec. That will really screw with (if not outright break) the
timing of the signals going across the board.
Any recommendations?
- skroo.
charlie wallace
Apr 12, 2023, 1:58:10 AM4/12/23
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Tate Belden
Apr 12, 2023, 2:34:35 AM4/12/23
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Tate Belden
"We do not become enlightened by imagining figures of light, but by making the darkness conscious."
John Norman
Apr 12, 2023, 10:22:36 AM4/12/23
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The only downside to optoisolators is that they are a bit slow compared to transistors and other semiconductor devices. You can get them.tonrespond faster by loading the driveb circuit up to higher current.
To view this discussion on the web visit https://groups.google.com/d/msgid/23b-shop/CAKaUS7KxCNH%2BOMUGBKE8zba%2BO6jDdLeSFoGUUbDdQCj1nPapww%40mail.gmail.com.
Volatile Compound
Apr 12, 2023, 11:53:29 AM4/12/23
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Understood. This is a case where that might be acceptable depending on
how slow slow is, but I won't know until I try. The data rates (serial)
involved are pretty low, but timing will be an issue.
Either way, I'm looking into both the Tindie and Mikroe boards.
Appreciate the links!
- skroo.
On 4/12/23 09:22, John Norman wrote:
> The only downside to optoisolators is that they are a bit slow compared
> to transistors and other semiconductor devices. You can get
> them.tonrespond faster by loading the driveb circuit up to higher current.
>
>
>
> On Tue, Apr 11, 2023, 11:34 PM Tate Belden <wyo...@gmail.com
> <mailto:wyo...@gmail.com>> wrote:
>
> https://www.tindie.com/products/land_boards/four-channel-optocoupler-card-optofast-2/ <https://www.tindie.com/products/land_boards/four-channel-optocoupler-card-optofast-2/>
how slow slow is, but I won't know until I try. The data rates (serial)
involved are pretty low, but timing will be an issue.
Either way, I'm looking into both the Tindie and Mikroe boards.
Appreciate the links!
- skroo.
On 4/12/23 09:22, John Norman wrote:
> The only downside to optoisolators is that they are a bit slow compared
> to transistors and other semiconductor devices. You can get
> them.tonrespond faster by loading the driveb circuit up to higher current.
>
>
>
> On Tue, Apr 11, 2023, 11:34 PM Tate Belden <wyo...@gmail.com
>
> https://www.tindie.com/products/land_boards/four-channel-optocoupler-card-optofast-2/ <https://www.tindie.com/products/land_boards/four-channel-optocoupler-card-optofast-2/>
>
> On Tue, Apr 11, 2023 at 11:41 PM Volatile Compound
> <volatile...@gmail.com <mailto:volatile...@gmail.com>> wrote:
>
> This is the sort of thing that would be ripe for laying out in
> KiCAD or
> similar, but it seemed to be worth checking if what I'm looking for
> already exists before going that route.
>
> Electrical specs: 5VDC, 250mA peak. No level conversion
> necessary or
> wanted. Should be able to handle digital signals
> bidirectionally on all
> four channels at up to, say, 9600bps.
>
> Something like the SparkFun Opto-isolator Breakout
> (https://www.sparkfun.com/products/9118
> <https://www.sparkfun.com/products/9118>) would probably work,
> On Tue, Apr 11, 2023 at 11:41 PM Volatile Compound
> <volatile...@gmail.com <mailto:volatile...@gmail.com>> wrote:
>
> This is the sort of thing that would be ripe for laying out in
> KiCAD or
> similar, but it seemed to be worth checking if what I'm looking for
> already exists before going that route.
>
> Electrical specs: 5VDC, 250mA peak. No level conversion
> necessary or
> wanted. Should be able to handle digital signals
> bidirectionally on all
> four channels at up to, say, 9600bps.
>
> Something like the SparkFun Opto-isolator Breakout
> (https://www.sparkfun.com/products/9118
> but it's
> only a 2-channel board. Using multiple boards isn't practical
> in this
> case due to physical space limitations.
>
> I've been looking at the TLP281- / ILD213T-based breakouts on
> Amazon and
> elsewhere, but there's evidence to suggest that they have off
> delays of
> around 30usec. That will really screw with (if not outright
> break) the
> timing of the signals going across the board.
>
> Any recommendations?
>
> - skroo.
>
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> only a 2-channel board. Using multiple boards isn't practical
> in this
> case due to physical space limitations.
>
> I've been looking at the TLP281- / ILD213T-based breakouts on
> Amazon and
> elsewhere, but there's evidence to suggest that they have off
> delays of
> around 30usec. That will really screw with (if not outright
> break) the
> timing of the signals going across the board.
>
> Any recommendations?
>
> - skroo.
>
> --
> You received this message because you are subscribed to the
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>
>
>
> --
> Tate Belden
>
> "We do not become enlightened by imagining figures of light, but by
> making the darkness conscious."
>
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>
> --
> Tate Belden
>
> "We do not become enlightened by imagining figures of light, but by
> making the darkness conscious."
>
> --
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