Collaborate Disseminate
[Chris Makes Stuff] is an aptly named channel. His recent video shows how he took a kid’s electric motorcycle toy and built a “penny farthing” bicycle. You might not know …read more Continue reading Hubless E-Bike is Nostalgic
Calling any one computer the first hobby computer is fraught with peril. Most people think the MITS Altair 8800, first featured in Popular Electronics back in January 1975, was the …read more Continue reading Forget the Altair! Remember the Mark-8!
Normally, if you want to control the gain of an amplifier, you’ll use a variable resistor. You know, like a volume control. But what if you want to control the …read more Continue reading Inside Electronic Gain Control
One of the interesting things about living in modern times is that a confluence of the Internet and rapid changes in the electronics industry means that test gear that used …read more Continue reading Repairing an HP Power Supply
It is a classic problem when designing with op amps: you need the output to go to zero, but — for most op amps — you can’t quite get down …read more Continue reading Quick Negative Voltage for an Op Amp
Ever wonder what’s inside a Nintendo Switch? Well, the chip is an Nvidia Tegra X1. However, if you peel back a layer, there are four ARM CPU cores inside — …read more Continue reading The Nintendo Switch CPU Exposed
It is hard to describe the Brother SuperPowerNote. It looks like a big old Z80-based laptop, but it says it is a notebook. The label on it says (with lots …read more Continue reading Porting CP/M to a Z80 Thing
[Raymond Chen] wondered why the x86 ENTER instruction had a strange second parameter that seems to always be set to zero. If you’ve ever wondered, [Raymond] explains what he learned …read more Continue reading x86 ENTER: What’s that Second Parameter?
We’ve seen a lot of AI tools lately, and, of course, we know they aren’t really smart, but they sure fool people into thinking they are actually intelligent. Of course, …read more Continue reading Can Google’s New AI Read Your Datasheets for You?
In the “don’t try this at home” category, [Joe Smith] builds a spark gap transmitter with a twist. The twist is that the drive power is from a signal generator …read more Continue reading Modern Spark Gap Transmitter Uses a Rotary Gap