JohnS_AZ

Hardware Happy Hour (3H) Phoenix (metro), Thu, Aug 14, 2025, 7:00 PM | Meetup NOTE CHANGED LOCATION ! ! ! Last month's meeting at the Advanced Cyber Systems Lab at Gateway Community College was great, so we're going back! The Washington campus is loc

THIS THURSDAY!
NEW LOCATION!!
Phoenix Hardware Happy Hour
Thursday, August 14th, 2025
Meeting at the Advanced Cyber Systems Lab at Gateway Community College, 40th St and Washington in Phoenix.
Find full details at:
www.meetup.com/hardware-hap...

Humbly suggest you get the F off of Twitter.
Your work is awesome!

How much power does that draw?

In this CPUless circuit, ASCII will be applied to the address lines of the PROM/S, and the data output from them has to represent the character in Morse. I have 8-bit wide PROMs.

But how would you get from Varicode to Morse?

Damn ... the number 0 is five dashes ... 11101110111011101110.
Takes 20 bits, more than two 8-bit ROMs wide.

Obviously, this is still a work in progress. :-)

across two ROMs, three consecutive 1's is a dash, a single 1 is a dot. Example, the letter "Q" is dash dash dot dash. 5-bit code = 1101, or the 16-bit code = 1110111010111.

Wait ... 5-bit won't work ... The letter "E" is a single dot and the letter "i" is two dots... in 5-bit both would be 00000.

And there's my current debate... Since there are NO microcontrollers/cpus in this circuit, just logic, and the ASCII to Morse conversion will take place in a PROM, would it be easier to decode (generate beeps) if the Morse Code is encoded as you say (5 bits, 1=dash 0-dot), or (cont)

hmm ... is it still compression of there is absolutely no data loss? (All caps characters only ASCII -> MORSE)

Nope. Since this is eventually going to send it in Morse Code, there can be no symbols.

Downloaded the text, converted to all-caps, deleted all of the punctuation, symbols, and double spaces, finally a tiny bit of manual editing and I was able to fit the entire novel into a single 27C2001 E-PROM. 🙂

One Hertz Challenge One second, sixty of them in a minute, 31 million in a year. For this challenge, design a device where something happens once per second

The metronome would certainly qualify. :-)
hackaday.io/contest/2032...

4MHz clock and a configurable 24-bit divider to get 1Hz using only 80's era parts pulled from scrap from behind my shop for a silly contest entry. 🙂 (555 and XOR on red board just a monostable to make the 250nS pulse visible)

My Saturday Morning.

So, how's YOUR Monday going?

Luckily, it appears that there's no roof damage. But it's 104°F now and heading to 113°F, so I'm waiting until the sun goes down to get up there and start sawing it away.

Damn! That's impressive!!

Hardware Happy Hour (3H) Phoenix (metro), Thu, Aug 14, 2025, 7:00 PM | Meetup NOTE CHANGED LOCATION ! ! ! Last month's meeting at the Advanced Cyber Systems Lab at Gateway Community College was great, so we're going back! The Washington campus is loc

MARK YOUR CALENDAR!
NEW LOCATION!!
Phoenix Hardware Happy Hour
Thursday, August 14th, 2025
Meeting at the Advanced Cyber Systems Lab at Gateway Community College, 40th St and Washington in Phoenix.
Find full details at:
www.meetup.com/hardware-hap...

Hardware Happy Hour (3H) Phoenix (metro), Thu, Jul 10, 2025, 7:00 PM | Meetup NOTE CHANGED LOCATION ! ! ! This month we'll be meeting at the Advanced Cyber Systems Lab at Gateway Community College -- Washington campus, located at 40th St and Washingt

T O M O R R O W !
NEW LOCATION!!
Phoenix Hardware Happy Hour
Thursday, July 10th, 2025
Meeting at the Advanced Cyber Systems Lab at Gateway Community College, 40th St and Washington in Phoenix.
Find full details at:
www.meetup.com/hardware-hap...

Hardware Happy Hour (3H) Phoenix (metro), Thu, Jul 10, 2025, 7:00 PM | Meetup NOTE CHANGED LOCATION ! ! ! This month we'll be meeting at the Advanced Cyber Systems Lab at Gateway Community College -- Washington campus, located at 40th St and Washingt

THIS THURSDAY!
NEW LOCATION!!
Phoenix Hardware Happy Hour
Thursday, July 10th, 2025
Meeting at the Advanced Cyber Systems Lab at Gateway Community College, 40th St and Washington in Phoenix.
Find full details at:
www.meetup.com/hardware-hap...

One Hertz Challenge One second, sixty of them in a minute, 31 million in a year. For this challenge, design a device where something happens once per second

TIL that the entire text of Orwell's 1984 will fit into three 27C256 UV EPROMs. <grin>

#OneHertzChallenge

hackaday.io/contest/2032...

Hardware Happy Hour (3H) Phoenix (metro), Thu, Jul 10, 2025, 7:00 PM | Meetup NOTE CHANGED LOCATION ! ! ! This month we'll be meeting at the Advanced Cyber Systems Lab at Gateway Community College -- Washington campus, located at 40th St and Washingt

MARK YOUR CALENDAR!
NEW LOCATION!!
Phoenix Hardware Happy Hour
Thursday, July 10th, 2025

Meeting at the Advanced Cyber Systems Lab at Gateway Community College, 40th St and Washington in Phoenix.

Find full details at:
www.meetup.com/hardware-hap...

After 25 years of constant flawless duty, my home automation system that controls the street-side lighting out front failed, and I had to replace every single control component. <smirk> (yeah, I find a lot of home automation projects kind of silly). :-)

Meta IS evil, but rest easy about the plants, they're likely rented for the event and will be taken back by the rental company when it's over (vetran of 100+ trade shows) :-)

NO Kings, Apache Junction, AZ.
#ProtestDate 🙂
#NoKingsDay

Late bloomers.
The cacti are usually done by now.
Nice way to start the week.

A little late, but got our flag up this weekend.

Okay, removing the large metal cylinders. :-)
There are 4 major boards, two each of two kinds.

BTW, the cylinders are each uniquely stamped ...
619/HP-31
619/HP-24
619/HP-3
and
619/HP-17

Covers off.

So this "emergency alert system" was one of the $5 rack units from the last auction.

I figured it'd probably have some sort of receiver, maybe a speaker, maybe an audio and/or video output, maybe a relay .

I just took the cover off.
Holy shit!
I have absolutely no idea. lol

Yup. Sitting on 4 projects that were going to need pcbway orders