Frequency response

Posted on by
Reply

So I pumped a 1 kHz square wave into my DTL OR gate and observed the behaviour with my scope!



The square wave is in yellow, and the blue is the output signal.

You can see the output doesn’t drop back to zero quite as fast as the input.

You can see on the multi-meter to the right that the current draw is about 5.83 mA. That’s consistent with my earlier measurements given a duty cycle of 50%.

And you can see in the following photo that the frequency response of the circuit is rubbish. If you go much above about 10 kHz the output just stays “on”.

Multi-meter cables

Posted on by
Reply

Made some cables. Male banana plug into male jumper wire. Got some of these and cut them. Made a pair of long ones and two pairs of short ones. This is so I can plug my multi-meters into my breadboards. Gonna do the same thing with some BNC attached coax so I can hook up my scope and with some female DuPont cables so I can plug into male pin headers.

Firefox snap, Ubuntu, EPSON printer not available

Posted on by
Reply

So I had to repave my primary workstation to fix a problem with my ZFS configuration (my ashift setting was causing problems) and things are mostly back online, but I wasn’t able to print from firefox for some reason.

I think the problem was that I had installed firefox prior to adding the printer. Anyway, long story short, this command seemed to fix the problem for me:

# snap connect firefox:cups-control