Efficient Computer’s Efficient Computer is 100X More Energy Efficient than Other General-Purpose Processors

I remember the heady days of the 1970s, when new and exciting 8-bit processor architectures were sprouting like metaphorical mushrooms. I’m sure that, like me, you are thinking of little beauties like the 8008 (1972), 8080 (1974), and 8085 (1976) from Intel, the 6800 (1974) from Motorola, the 6502 (1975) from MOS Technology, and the Z80 (1976) from Zilog.

However, there were many other contenders that deserve mention, such as the 8-bit PPS-8 (1974) from Rockwell International, which … Read More → "Efficient Computer’s Efficient Computer is 100X More Energy Efficient than Other General-Purpose Processors"

Fish Fry Special Edition: Amelia’s Favorite Episodes for 2025

People frequently ask me if I have a favorite podcast episode. Well folks, here are my favorites for 2025! The top of the list is an episode called “Have Your Cake and Eat The Batteries too!. In this episode, I explore how fungi can function as organic memory devices, the details of RoboCake, a multi-tiered dessert featuring various edible components and the world’ … Read More → "Fish Fry Special Edition: Amelia’s Favorite Episodes for 2025"

A Blob No More

My head hurts. As usual, I’ve been floundering around in embedded space (where no one can hear you scream). And as a result, I’ve been introduced to something with so many possibilities and potentialities that I don’t know whether I’m coming or going or doing something else entirely.

I was just chatting with Rolf Segger, the Founder, Owner, and Chief Strategist, and Dirk … Read More → "A Blob No More"

Scrona and A New Era of Micro-Manufacturing

In this week’s podcast, we’re diving into a world you can barely see—the world of micro-manufacturing. The technology that’s quietly powering the next generation of everything from advanced displays and tiny sensors to biomedical devices. My guest Dr. Patrick Heißler, CEO of Scrona, and I chat about how Scrona fits into the micro-manufacturing … Read More → "Scrona and A New Era of Micro-Manufacturing"

January 8, 2026
January 7, 2026
January 6, 2026
January 5, 2026
December 30, 2025
December 29, 2025
December 22, 2025

featured chalk talk

High-Speed FAKRA-Mini Interconnect System
Sponsored by Mouser Electronics and Molex
In this episode of Chalk Talk, Kirk Ulery from Molex and Amelia Dalton explore the trends driving a need for external and internal data connections in automotive applications. They also investigate the benefits of the FAKRA Mini interconnect system and why the new locking and shielding mechanisms make this system rugged enough for the harshest automotive environments.
Dec 22, 2025
36,907 views

featured news

Need Faster VNX+ Development? Elma Just Built the First Lab Platform for It

Sponsored by Elma Electronic

Struggling to evaluate VNX+ modules or build early prototypes? Elma Electronic’s new 3-slot FlexVNX+ dev chassis streamlines bring-up, testing, and system integration for VNX+ payload cards—SOSA-aligned, lab-ready, and built for fast time-to-market.

Click here to read more

featured video

Revolutionizing AI Chip Development: Synopsys Solutions for the Future

Sponsored by Synopsys

In the AI era, demand for advanced chips is soaring, creating scaling and power challenges. Discover how Synopsys accelerates AI chip development with innovative solutions, robust partnerships, and cutting-edge silicon IP for first-pass silicon success.

Click here for more information

discussion
Posted on Jan 8 at 8:33am by Max Maxfield
This is very cool -- thanks so much for sharing -- Max
Posted on Jan 8 at 8:32am by Max Maxfield
I love the Turbo Encabulator -- I wish I'd created a video like this myself
Posted on Jan 8 at 6:22am by Max Maxfield
But soldering is fun LOL I'm actually thinking of the final ALU as a piece of wall art (remember each sub-function and multiplexer will be festooned with LEDs -- mounted in a shadow box, doing something like calculating the value of Pi for all eternity.
Posted on Jan 8 at 12:44am by Anatsrg
Anyway, designing ALU in SN7400 series needs a lot of soldering. To minimize it, the functions CMP, XOR, ADD, and negation are usually performed in a single adder by control of carry, XOR etc.
Posted on Jan 7 at 2:09pm by jimbrake
Perhaps this is vanity: I've done one bit and four bit processors for FPGA implementation. The rational is at: https://github.com/jimbrake/ISA-Exploratorium/blob/main/LEM/LEM_exec_sum.pdf (LEM stands for Logic Emulation Machine) The FPGA resource usages are at: https://github.com/jimbrake/ISA-Exploratorium/blob/main/_...
Posted on Jan 7 at 12:36pm by Max Maxfield
We used PROMs to implement many things in the early 1980s, from gathering simple "glue logic" functions to acting as look-up tables to forming the heart of simple state machines. Ah, the good old days :-)
Posted on Jan 7 at 12:33pm by Max Maxfield
Ah, the 74181. That was an iconic 4-bit ALU. I say was because it's now obsolete and not actively made by major manufacturers anymore, but you can still buy them as new old stock (NOS). It had ~70–75 gate equivalents (~170+ transistors). It boasted 32 total functions (16 logic and 16 arithmetic), but many of these ...
Posted on Jan 7 at 10:18am by Anatsrg
It was proven that the best 4-bit ALU is SN74181. Perhaps, it would be better to follow its inner structure.
Posted on Jan 7 at 10:01am by traneusee
I remember the NE-77 three-electrode neon lamp.
Posted on Jan 7 at 10:00am by traneusee
Yes, the ROM would be 8192 bytes to include the C input. Also, for LEDs and for teaching, the discrete gates are much better. Working on embedded systems in 1980, we were already used to programming software into PROMs. I was tasked to build a tester to reproduce one customer's system's existing ...
Subscribe Now

featured blogs
Jan 7, 2026
After watching these videos, it's hard to argue with the sentiment 'There should be a Nobel Prize for engineering, not just in physics and chemistry.'...
STCC4 CO2 Sensor: Enabling Healthy Air in Every Home
Sponsored by Mouser Electronics and Sensirion
In this episode of Chalk Talk, Dr. Kaitlin Howell from Sensirion and Amelia Dalton explore the correlation between ventilation and carbon dioxide sensing and how the features of Sensirion’s STCC4 CO2 Sensor can enable air condition monitoring with ease.
Dec 10, 2025
54,567 views
Data Center Solutions
Sponsored by Mouser Electronics and Microchip
In this episode of Chalk Talk, Josue Navarro from Microchip Technologies and Amelia Dalton investigate the biggest challenges of AI servers and the benefits that power modules can bring to these types of designs. They also explore the roles that energy efficiency, power density, thermal management, and security play in the AI server applications and how you can take advantage of Microchip solutions for your next AI server design.
Dec 8, 2025
55,868 views
Simplifying Position Control with Advanced Stepper Motor Driver
In this episode of Chalk Talk, Jiri Keprda from STMicroelectronics and Amelia Dalton explore the benefits of the powerSTEP01 is a system-in-package from STMicroelectronics. They also examine how this solution can streamline overall position control architecture, the high level commands included in this solution and the variety of advanced diagnostics included in the powerSTEP01 system-in-package.
Jan 21, 2025
31,006 views