Shift Register TI ''LS674
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Posts: 46,084
Hi Bob,
I used a 74HC165 parallel-in serial-out shift register to read external
informations via optocouplers. If you need more inputs for your Stamp, it's
what you need.
This chip is easy to use : clock input to shift the datas, inhibit input to
disable the chip, and shift/load input to read inputs / shift to output.
It's cascadable, so if you need 16 inputs, you only need 2 linked chips and
16 clock pulses. So with 4 (or even 3 if you don't use the inhibit input)
stamp lines, you can have nearly as many inputs as you want.
Hope this helps...
Phil.
Original Message
From: "Pence Bob" <bobpence_2000@y...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, May 11, 2001 8:26 PM
Subject: [noparse][[/noparse]basicstamps] Shift Register TI 'LS674
> Anyone have experience with the Texas Instruments
> SN54/SN74LS674 parallel-in serial-out shift register?
> I though I had mastered the machinations of shift
> devices after getting an LTC1298 ADC to work, but the
> 'LS674 adds the R_W pin to select whether its single
> I/O pin reads or writes; also, I am tying the Mode
> switch to +5vdc. I need to connect two 8-pin DIP
> switch banks.
>
> Thanks in advance
>
> Bob Pence
>
> =====
> Regards,
>
> Bob Pence
>
> NOTE: This mail is sent using my wireless phone. Calling me at 1 (610)
563-6198 is preferred to a reply. If replying to this email address, please
do not quote the original message.
>
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>
I used a 74HC165 parallel-in serial-out shift register to read external
informations via optocouplers. If you need more inputs for your Stamp, it's
what you need.
This chip is easy to use : clock input to shift the datas, inhibit input to
disable the chip, and shift/load input to read inputs / shift to output.
It's cascadable, so if you need 16 inputs, you only need 2 linked chips and
16 clock pulses. So with 4 (or even 3 if you don't use the inhibit input)
stamp lines, you can have nearly as many inputs as you want.
Hope this helps...
Phil.
Original Message
From: "Pence Bob" <bobpence_2000@y...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, May 11, 2001 8:26 PM
Subject: [noparse][[/noparse]basicstamps] Shift Register TI 'LS674
> Anyone have experience with the Texas Instruments
> SN54/SN74LS674 parallel-in serial-out shift register?
> I though I had mastered the machinations of shift
> devices after getting an LTC1298 ADC to work, but the
> 'LS674 adds the R_W pin to select whether its single
> I/O pin reads or writes; also, I am tying the Mode
> switch to +5vdc. I need to connect two 8-pin DIP
> switch banks.
>
> Thanks in advance
>
> Bob Pence
>
> =====
> Regards,
>
> Bob Pence
>
> NOTE: This mail is sent using my wireless phone. Calling me at 1 (610)
563-6198 is preferred to a reply. If replying to this email address, please
do not quote the original message.
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Auctions - buy the things you want at great prices
> http://auctions.yahoo.com/
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>