Richard Jelen

Articles (6)

TitleAuthor(s)PublicationDate
Input/Output
Letters from David Lassov, Leon Howell, Dave Barnes, Dr. D. H. Williamson, Gene Ray, D. G. Smith, Wayne Knaust, Richard...
ZXir QLive Alive!Spring 1994
Input/Output
Letters from Richard Jelen, Edward Snow, Robert Gilbert, Gene Ray, Robert Barnett, Robert Hartung, Rod Gowen, David Lassov.
ZXir QLive Alive!Summer 1994
Ni-Cad Charger
Constant current charger for TS 1000.
ZXir QLive Alive!Spring 1994
Parts Inventory
Inventory database.
ZXir QLive Alive!Summer 1994
QL Video Output CircuitZXir QLive Alive!Spring 1994
TS-2068 – CMOS on Board
Change most ICs on 2068 to CMOS to reduce power consumption, for running off batteries.
ZXir QLive Alive!Spring 1994

User Groups (1)

Videos (4)

TitleDateWatch
Timex Sinclair Online User Group Meeting February 2, 2026
We discussed custom keycaps for a full-size keyboard for the ZX81/TS1000, Carl and Ingo's work on getting Carl's new full-featured...
February 2, 2026
Timex Sinclair Online User Group Meeting May 5, 2025
Our meeting included introductions from four new-to-the-Zoom meeting members, as well as updates on Greg Bennett's Wordle program and the...
May 5, 2025
Timex/Sinclair Online User Group Meeting March 2, 2026
Our meeting covered keyboard Kickstarter plans, Pascal compilers, AI-assisted coding, TS-Pico debugging, and RAM expansion techniques.
March 2, 2026
Timex/Sinclair Online User Group Meeting Sept 1, 2025
We chatted about preserving Asa Gordon's program from his time at NASA, modern hardware projects, and other Timex/Sinclair topics.
September 1, 2025
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