Posts

Victorian Teletype AKA SteamPunk themed

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 This is a short intro to my TTY Teletype project ( addition)  to my Cosmac Elf 1802 family. Here is a YouTube link to the INTRO video, 2:23 mins in duration. https://www.youtube.com/watch?v=n57a-BLW3nY&ab_channel=DanielRoss The finer details...The No7 as I received it.. DOA. Donor # 1 typewriter,  A Remington No7, circa 1900, this one was rusty and covered in soot, must have been involved in a fire at some time, possibly hosed down, the wood bits where staring to rot. Donor # 2 typewriter, A Sharp PA-3000 from 1990s, daisywheel print, no display, limited character buffer memory. Mashup result, ( not fully completed) as you can see the keyboard is 1/2 there. The blinking lights on the keytops reflect what character, digit is been printed by either the computer or the operator, also shown in the display. Below is a test during the build, I'm using the  electronic Typewriter keyboard and adjusting the travel on the carriage platen.   Another test example, paper load and test prin
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 Post # 5 Video (CRT ) unit closeup. The YouTube link to a 5 min presentation  of the Dual CRT unit and the making ( assembly ) of it. https://www.youtube.com/watch?v=9s5nEjI90rM&ab_channel=DanielRoss Thanks

Post # 4 SYSTEM walk around

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This is a you tube link to video # 2 ,  An overall view "walk around" of the complete system. https://www.youtube.com/watch?v=z010E298Q2Q
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                                                                                               Post # 3 YouTube link           Cosmac 1802 loading software via audio port. Cosmac 1802 loading software via audio port.
 My Cosmac 1802 Build part 2 Main Cabinet Oct 13 2020 The Main cabinet is made of wood re- purposed from old tube radios cabinets. Parts where removed, re-arranged,  added to, then re finished stained then fitted with the brass parts. Electronics where added, a tray slide enabled the main electronics the be slid out for service. Other than the front large brass face plate, all other parts where custom made, fit, and function . Below is a short 2 minute video of the Main cabinet build process. end of part 2

My Cosmac 1802 build

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 Back in 1976 Popular  Electronics published an article about an RCA CPU called CDP1802, COSMAC ELF. This was to be the entry point to computers for me. Had fun building it on a perf board and point to point wire soldering.   Below my collection of  "1802 bibles". Each one of these magazines had 1802 projects/ programs/ or  schematics. Fast forward some 4 decades and now I'm re-visiting that humble little computer and super sizing it a bit. Here is my latest incarnation the Steam Punked  COSMAC VIP - ELF project.   What is it?  Its made up of  5 parts, The MAIN cabinet, The Glass TUBE Display, The BCD-HEX keyboard, The ROTARY HEX keyboard and Audio Speaker (horn), and finally the VIDEO CRT display unit. The main electronics are made up of  custom made PCB 4" x 4" stacked on a 5" x 10" motherboard. They are located in the MAIN cabinet, ( the unit with the 8 blue 7 segment VFD displays). Above are the main ELECTRONICS located in the cabinet shown below.