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Number sieves are machines that outran computers, 1920s-1990s. A 1982 design in ATtiny412s, aimed at factoring a 16-digit number.
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A Tiny Sieve | Lehmer's Math Machine in ATtinys

kbsriramkbsriram

A low-cost and accurate tool for analyzing the power consumption of ultra-low power and IoT devices with rapidly changing current usage
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MetaShunt: High Dynamic Range Current Measurement

jake-wachlinJake Wachlin

The first truly personal device for kids — designed to grow with them from drawing sprites to writing C++
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RCKid

zdukaZduka

A BJT, a bad mixer, a microcontroller ADC, and entirely too much software.
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Build Any RF Frontend With a Transistor

oleg-kulykOleg Kulyk

Where we excavate the firmware ROM of the 1981 Busch 2090 Microtronic Computer System from its mask-programmed TI TMS1600 Microcontroller
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Microtronic Firmware ROM Archaeology

michael-wesselMichael Wessel

A Practical 4-Bit Educational Computer * Reinvented Retro Contest 2021 Winner *
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Microtronic - The Next Generation

michael-wesselMichael Wessel

Compute like its 1981 - hex on a 6digit 7segment LED bubble display! (One of the) RetroChallenge 2021/10 "Winners"
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A Retro-Authentic Microtronic - RC 2021/10 Winner

michael-wesselMichael Wessel

A Talking Arduino-Based Emulator of the Busch 2090 Microtronic Computer System.
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The Talking Microtronic Computer System Emulator

michael-wesselMichael Wessel

After 45 years, the original Microtronic firmware ROM rises from the ashes and flies with new hardware!
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Microtronic Phoenix

michael-wesselMichael Wessel

compact, energy-efficient, battery-powered system for ePaper-based display of information gathered via Wi-Fi
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Tinta - low power wireless epaper device

casparcaspar

Another homebrew computer based on the MSX standard. But it uses a Z380 microprocessor.
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XRX - eXperimental Research X

marcellus-pereiraMarcellus Pereira

Open hardware and firmware that sit inline with a bench power supply, adding live measurement, protection, and SCPI control.
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PSU-EXT

dzmitry-dydyshkaDzmitry Dydyshka

Project #7801
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Sphaericae amica

techspiderbotTechSpiderbot

Budget-friendly 16-channel GPIO expander. MCP23017, I²C, chainable to 128 GPIOs, fits $2 PCB deal.
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Basic GPIO Expander - MCP23017

diy-guy-chrisDIY GUY Chris

This is an 8 bit vacuum tube computer I built using recycled 1950s 6N3P double triode tubes I found in Eastern Europe a few years ago.
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Vacuum Tube Computer

mikeMike

An integrated design suite for makers: CAD, image generation, image-to-mesh. Runs on your own machine — no cloud, no account, free.
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Livyatan Design Suite

jeremiahJeremiah

Going up?

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