[Coco] What do you use for pull-up and pull-down TTL resistor values? (LS series) (coco related project but possibly OT)

[Ed Snider]

I agree wholeheartedly with Gene.  An oscilloscope will help your learning curve immensely.
It’s an absolutely must have item.  You want at least 10 times the bandwidth of whatever frequencies
you’re working with.  A 100MHz scope is a good place to start.

I’d recommend staying away from the PC/USB type and getting a stand-alone unit such as the
Hantek DSO5102P which can be had for about $250 (eBay, etc.) and has a lot af nice features
for the price.

Honestly I wouldn’t even consider going without a scope at all building and troubleshooting
electronics. They really are essential and most definitely worth getting if you’re going to much at all.

- Ed


> On Apr 23, 2019, at 1:59 PM, James Ross <jrosslist at outlook.com> wrote:
> 
> Gene Heskett wrote:
>> If you are at all serious about learning this stuff, remove the
>> word "eventually". Get the scope NOW. 
> 
> ha! good advice Gene!! No doubt you are right.  In fact I could probably use one right now with a practice circuit that has a glitch.  I've built it twice, both times exact same glitch. I am going to work on it some more and will post about it if I can't figure it out.  
> 
> James
>