« earlier | later » Page 10 of 84
The Life of Kenneth: 555 Constant Current Lead-Acid Battery Charger
To implement the state machine of a lead-acid battery charger, you need a couple of comparators and a flip-flop. Which is what's in a 555! Neat design.
to 555 battery charging electronics lead-acid psu ... on 15 November 2015
Grant's MULTICOMP pick and mix computer
"Pick-and-mix to create your own custom computer on a low-cost FPGA board (BASIC, Z80, 6502, 6809, internal/external RAM, serial/keyboard+monitor, SD-card for CP/M or other storage)"
to 6502 6809 cpm electronics emulation fpga retrocomputing z80 ... on 23 September 2015
The Sproutie MK II HF Regen Receiver | Dave Richards AA7EE
A very impressive shortwave receiver, using an HRO-style tuning control, a regenerative frontend and a load of multistage audio filters.
to electronics ham hf radio receiver regen shortwave ... on 23 September 2015
I have a bunch of CDP1802s in my box of computer chips -- I ought to build one of these...
to cdp1802 electronics homebrew rca retrocomputing ... on 13 September 2015
A comprehensive collection of vintage video and TV equipment, and some extremely impressive homebrew electronics along the same lines. His iconoscope camera is jawdropping.
to electronics iconoscope retrotech tape tv vcr video ... on 13 September 2015
Recreating an RCA COSMAC computer that never made it to market.
to cdp1802 cosmac electronics micro rca retrocomputing ... on 13 September 2015
Modifying a Hammond M-100 series spinet organ to behave more like a B-3.
to electronics hammond leslie organ retrotech tonewheel ... on 29 June 2015
A very comprehensive wiki about playing and maintaining Hammond tonewheel organs. Useful reference even for those of us who're just playing a software simulation...
to electronics hammond instrument music organ retrotech tonewheel ... on 29 June 2015
Микроконтроллеры и микропроцессоры / Продукты / Ангстрем
Russian electronics company Angstrem, who still advertise their PDP-11 and VAX clone CPUs. I wonder whether they sell them in hobbyist quantities?
to cpu electronics pdp11 retrocomputing russia soviet vax ... on 24 June 2015
Forum for Belorussian electronics company Transistor, where one of the moderators has been enthusiastically digging up and scanning old datasheets. This includes the KA1835 PDP-11 clone series, as used in the Elektronika MK-90.
to cpu datasheet electronics pdp11 retrocomputing soviet ... on 24 June 2015
« earlier | later » Page 10 of 84
tasty by Adam Sampson.