[chbot] TTL to Line driver

[Alan]

Stupid question: would a usb / ttl converter do what you need? I have at 
least one cable you are welcome to try (possibly another somewhere)

https://nz.mouser.com/ProductDetail/BK-Precision/IT-E132?qs=s9e3C%252B7F3LmVKDVIizC16w==

Cheers

Alan

On 12/09/20 1:14 pm, Trevor Wignall wrote:
> TTL compatible CMOS chips are available, and will probably meet your 
> need. I haven't researched this, but I expect there will be suitable 
> drivers available. You might need two ICs, one inverting and one 
> non-inverting. If one output isn't grunty enough, two or more outputs 
> can be parallelled.
> Trevor
>
> On Sat, Sep 12, 2020 at 7:20 AM Mark Atherton <markaren1 at xtra.co.nz 
> <mailto:markaren1 at xtra.co.nz>> wrote:
>
>     No sure how many channels you need, possibly 4 ?
>
>     26C31 is a standard quad RS422 driver. RS485 drivers can be used with
>     the TX output enable tied active.
>
>     MAX485 is a single channel, and I guess at NZ$3.50 ea, you could
>     buy several
>
>     also have a look at
>     https://www.trademe.co.nz/a/marketplace/electronics-photography/other-electronics/electronic-components/other/listing/2775249657
>
>
>
>     -Mark
>
>
>
>     On 11/09/2020 10:44 PM, Martin Towers wrote:
>     > Hi Wallace,
>     > You might try looking for TTL to RS485 converters.
>     > This is a bad example - it's expensive and in India, but it
>     shows they
>     > exist.
>     > https://robu.in/product/max485-ttl-rs485/
>     >
>     > Martin
>     >
>     >
>     > On Fri, 2020-09-11 at 16:12 +1200, Marshland Engineering wrote:
>     >> My encoder has become intermittent on my CNC mill. I have found
>     that
>     >> my Liner
>     >>   scale from Aliexpress has the correct resolution to work with the
>     >> controls.
>     >>   The problem I have is the linear scale is TTL output and the
>     >> connection I
>     >>   require is differential equivalent to a SN75183.
>     >>
>     >> https://www.ti.com/lit/ds/symlink/sn75183.pdf
>     >>
>     >> Anyone know of an off the shelf TTL to differential unit. My
>     searches
>     >> don't
>     >>   yield much other than discrete components.  Maybe there is
>     another
>     >>   workaround?
>     >>
>     >> Thanks Wallace.
>     >>
>     >>
>     >>
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