a day ago •
Here is the second version of the Uglytech relay. I will try this for signal isolation to the typewriter/printer. Still needs work but getting better at this...
This video shows that the relay does work with both IO and the printer Note the screw and nut added to adjust gap.
03/02/2018 at 17:11 •
Found this Smith Corona Typewriter for $8 and it works fine. No, the Hello World is not from IO... I might be able to patch IO into the keyboard electronics so please pray for me on this one :-)
The keys press a small rubber? coated finger across the meshed contacts so I think that the contact is acting like a capacitor. Going to begin mapping out the matrix...
So far so good. The contacts are simple make and break. Makes the use with IO a little easier :-
So here it is March 4, 2018 and I have cobbled up a plug in adapter to where the keyboard ribbon cable connects to the main board. Take a look at the progression and either shake your head or chuckle a little but the connection is rock solid.
At least this way I can restore the typewriter back to the way it used to be later :-)
Here is how the connector has mapped out.
03/02/2018 at 13:03 •
Starting to layout the construction and wiring for the logic board that will read the program ROM cards. Just like all other wiring on IO, this will be a large board...
The ROM back plane will mount above the logic circuits...
02/20/2018 at 23:17 •
I have streamlined the construction of my 5 contact edge connector to where I can produce the number that I need for Brainwarp. What follows is a pictorial step by step for making a cardboard edge connector. One thing to note is that the contact center to center is 3/4 inch. Materials are cardboard, brass paper fasteners and hot melt glue.
As of February 22, 2018 I now have 10 connectors just about finished.
This is the Mock-up of the Brainwarp ROM motherboard. Still needs six more connectors.
02/15/2018 at 23:19 •
Edge connectors made with cardboard ? Yup
This is a side project for IOs Brainwarp. The magnetic cards are not making very good consistent contact over time so I am looking into rolling my own edge connectors using my usual cardboard and fasteners.
What can I say,. It's pure Uglytech :-D But it works..... Muahahahaha
February 16, 2018
Well, it works with the addressed test board so I think that this is a go :-)
02/10/2018 at 23:21 •
Testing the logic for a diode ROM to be used on the Brainwarp entry panel. So far so good as it is working as expected. This test panel uses 2 bit addressing to select between 4 memory addresses with 4 bits each.
01/31/2018 at 02:04 •
I have added a very basic speed control to the master clock circuit.
01/26/2018 at 14:15 •
I have hooked up the new astable multi-vibrator and master slave flip flop to IO and the sequencer. Looking good :-) Yann has waited a long time for this ;-)
01/25/2018 at 13:45 •
Got a bit distracted with the IO project ( Now how can that happen ) and decided to wire up a new ( for me ) flip flop circuit. Yann has wanted me to ditch the 555 as a clock and the pulser circuit from the start and now is the time :-)
By using a master slave flip flop I can get rid of the pulser and replace the master NOR flip flop with a Nand logic master slave. This is also the start for building a 4017 Johnson Counter using this master slave :-)
And here is a video of the new flip flop in action as well as using the new clock circuit.
01/11/2018 at 10:07 •
I was starting to run low on my led supply for IO and then along comes a New Years gift so to speak. I frequent my local Habitat Re-Stores almost every week and they put out items that did not sell or not in good enough condition to sell.
Habitat for Humanity is a great organization that helps build and provide housing for those who do not have the financial means to do it on their own.
This week it was a box of 14 led fabric decoration kits that were old and the internal batteries corroding. Overall there are 140 leds for IO. Red, yellow and green should be nice in addition to the blue/white leds I have been using :-)