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Re: Telethons 2445


 

That ought to do it.

Harvey

On 10/15/2023 4:06 PM, Tom Gardner wrote:
Something like this should be OK.


Make sure the IC is properly decoupled with minimal lead lengths.

The rule of thumb for the risetime of a scope/probe combination is
tr=0.35/BW, so a 100MHz scope should show a 3.5ns risetime.


On 15/10/2023, Walt KA2NJF via groups.io
<wmilton2359@...> wrote:
Harvey,
Can you draw that up for me. I have to be very careful since my right hand
shakes when it wants to. I do have a plug in breadboard that I can use. The
Schmidt trigger chip I will look a see if I have any. If not then I will
purchase some.
Walt


Sent from the all new AOL app for iOS


On Sunday, October 15, 2023, 12:44, Harvey White <madyn@...>
wrote:

Can you breadboard TTL?

1K in series, 5.0 volt P-P sine wave, diodes to VCC and GND to limit
what the gate input sees, use any schmidt trigger (74LS14, etc) to
produce a pulse output, then run that through a few gates (same package)
to neaten it up, and you have an emergency square wave generator.

Harvey

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