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Vintage Digital Frequency Meter Teardown
You think of digital displays as modern, but the idea isn’t that new. We had clocks, for example, with wheels and flip digits for years. The Racal frequency counter that [Thomas Scherrer] is playing...
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Simple STM32 Frequency Meter Handles Up To 30MHz With Ease
[mircemk] had previously built a frequency counter using an Arduino, with a useful range up to 6 MHz. Now, they’ve implemented a new design on a far more powerful STM32 chip that boosts the measurement...
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Upgrade Puts a Lot of Zeroes on Kit-Built Frequency Counter
If there’s anything more viscerally pleasing than seeing an eight-digit instrument showing a measurement with all zeroes after the decimal point, we’re not sure what it could. Maybe rolling the...
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Korean Multifunction Counter Teardown
[Thomas Scherrer] likes to tear down old test equipment, and often, we remember the devices he opens up or — at least — we’ve heard of them. However, this time, he’s got a Hung Chang HC-F100...
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2025 One-Hertz Challenge: ZX Spectrum Is Now A Z80 Frequency Counter
The ZX Spectrum is perhaps most fondly remembered as a home computer and a games machine. [Tito] has grabbed the faithful black plastic box and turned it into a frequency counter as an innovative entry...
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2025 One Hertz Challenge: 4-Function Frequency Counter
Frequency! It’s an important thing to measure, which is why [Jacques Pelletier] built a frequency counter some time ago. The four-function unit is humble, capable, and also an entry into our 2025 One...
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2025 One Hertz Challenge: The Easy Way to Make a Nixie Tube Clock
Let’s say you want to build a Nixie clock. You could go out and find some tubes, source a good power supply design, start whipping up a PCB, and working on a custom enclosure. Or, you could skip all...
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