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The Mengenlehreuhr, German for “Set Theory Clock”, more commonly known as the Berlin-Uhr clock was the first public clock in the world to use lighted segments to represent the time. It was commissioned by the West German Senate and was a popular photo spot in West Berlin, and in modern Berlin it has been moved to the front of the Europa-Center. If you love the retro-futuristic look of this very unique clock, then make sure you check out this amazing Berlin-Uhr Table Clock!

The kit comes unassembled, and assembly requires both soldering, gluing, and epoxy pouring. If you’ve never poured epoxy resin before, definitely take a look online at some resources or videos of people doing it to get a feel for the process. We particularly like Peter Brown’s channel Shop Time! His lighthearted and creative personality get you wanting to pour epoxy on everything.

The clock works by flashing the top light on and off, once every two seconds. So if the lamp is off, it’s an even second, and if it’s on, it’s an odd second. The eight red rectangles below encode the hour: multiply the number of illuminated boxes in the top row by 5, and then add the number of boxes in the bottom row. The next row, which contains mixed red and yellow rectangles, represents 5-minute increments. The bottom 4 lamps encode individual minutes. So, the displayed time in the image above is: 4*5 = 20 hours, plus 2, for 22h. 6 segments of 5 minutes each = 30, plus 3, so 22:33 is the time, and we’re on an odd second. Pretty neat, especially for a public sculpture in 1974!

The project is fully open source, and is in the process of being certified Open Source Hardware by OSHWA! Be sure to also check out their DCF77 bitstream clock, which appears to be a work in progress. As someone interested in longwave broadcasts and in atomic time transmissions in particular, this one piqued my interest. Perhaps someday we’ll cover that clock, too!

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The Amiga was well known for creative expression; from music to digital art and desktop publishing, it could handle a lot of things that contemporary machines couldn’t. It output video in RGB, which was amazing if you had an RGB monitor, but if you didn’t, you had to purchase a separate TV modulator or composite conversion module. The AMYVIDHYBRID+FBAS is a modern solution that gives crisp, high-quality composite and S-video output, while still allowing use of the RGB outputs and the genlocking capabilities that go with it.

This module not only produces composite and S-video, but it does it in a way that produces much sharper and more vibrant video than the original Commodore-made composite video converter. To use it, you install it in place of the original Commodore Video Hybrid (often called the VIDIOT), which does require desoldering. If you’re not experienced at desoldering ICs, you should ask a hacker buddy for help, especially if they have a vacuum desoldering tool. Use lots of flux, and be careful not to lift traces. Remember, if you use solder wick, dab it on, and don’t drag it across the PCB while pressing with the iron — that’s a recipe for ripping up PCB traces and pads!

Once you’ve got it installed, composite output is available on the hybrid output pins leading to the video connector, and S-video requires soldering a simple RCA socket to the left side of the hybrid and connecting it there. Of course, you could always route the video in any way you want by adding new connectors. You’ll be happy with the boost in picture quality and the flexibility of having multiple video standards on your Miggy!

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During the 1980s, many vendors sold small, pocket-sized computers that ran BASIC. Despite their small size and low power consumption, they were relatively capable and could interface with tape storage and thermal printers. The SHARP PC-1500 was a very popular model with a Z80-based CPU. However, its weak point was the small amount of RAM and storage space for programs – only 2k. Some expansion modules are still found for sale from the period, but they are ridiculously expensive. This 16k RAM Module with Battery Backup is a great way to breathe some new life into these old machines!

Not only does this give a huge upgrade to storage space as NVRAM, but it also uses modern memory chips which are very low-power. This means the CR1616 battery should be able to keep the contents of RAM for a long time. This is useful as the machine uses 4xAA batteries. Ideally, using rechargeable AA batteries should be the goal, but you still need to power down the device to swap batteries; this would lead to the memory being wiped without a secondary power source.

Gold-plated contacts ensure a good connection to the expansion port connector. This module is compatible with all SHARP PC-1500 and PC-1500/A models, as well as the TRS-80 PC-2 model rebadged for sale at Radio Shack. Pick one up and supercharge your classic pocket PC while still enjoying the vintage BASIC programming goodness!

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If you’ve been thinking about developing a wireless device, whether IoT or not, this ARGALI SIM C3 is an absolutely packed development board. It’s in the format of a Feather board, with an ESP32-C3 module plus a SIM7080 modem. So in one board you have wireless radios for Bluetooth/BLE, WiFi, GPS, Thread, Zigbee, Matter, and NB-LTE (CAT-M). This powerful combination of radios allows both low-power, short-range connections to wireless sensors or mesh networks, as well as low to medium-power long-range connections to WiFi and LTE for internet access.

A STEMMA QT connector opens up a huge range of sensors to prototype with, allowing you to easily build and test sensor networks. Additionally, a Li-Ion battery connector with charge control circuitry enables true wireless operation, with charging via USB-C or a separate 5V input. This could be used for energy harvesting, solar, or wired power — all taken care of for you so you can focus on developing your application.

This kit comes with three antennas, pin headers, and a Li-Ion battery (though check to make sure shipping batteries to your country is allowed without hassle). The Feather form factor additionally allows a huge range of FeatherWing add-on boards, both from suppliers like Adafruit as well as third-party developers — here on Tindie we have a great selection to check out!

If you’re looking to prototype or deploy an IoT or wireless device that leverages multiple radio stacks plus location data, the ARGALI SIM C3 looks like an awesome choice for quickly getting up to speed.

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Liquid pumps are always fun to play with. Whether you’re automating your garden watering or making a bartending robot, pumps and motors are useful devices. Peristaltic pumps are a special kind of liquid pump in which the fluid does not come into contact with any part of the pump mechanism, only the inside of the tubing. This makes them very useful for beverages or scientific reagents and chemicals. But sometimes you need very precise amounts! I didn’t even know you could get peristaltic pumps this small, but this Tiny Peristaltic Fluid Pump Breakout packs everything you need to carefully dispense small amounts of fluid onto a single board!

The board uses a DRV8833 motor driver IC along with a tiny micro-stepper motor to actuate the pump mechanism. This makes it compatible with popular software libraries for stepper motors, such as Arduino’s Stepper. It has a fault output, which is handy for monitoring and making sure the pump is functioning. It can even support up to 4A of drive current peak, with an average of 3A RMS, which is a lot of oomph for such a small motor.

You can use this for measuring out precise amounts of reagents for doing chemical reactions measuring out small amounts of artificial flavour concentrates for making food or drink, or even tiny amounts of paint for… whatever you want! Check out the video below to see it in action.

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Arduino Nano (and its many clones) are cheap and plentiful. Their small size, easy programmability and flexibility make them a great choice for many small to medium-scale microcontroller projects. Most often they come with DIP headers so they can be soldered into protoboard or directly onto a custom PCB. However, for quick prototyping, this can be a bit of a pain. This large and easy-to-use Arduino Nano Breakout Board with Screw Terminals is an easy way to both quickly attach wires for prototyping while also being well-protected enough to be used in a more permanent installation.

Screw terminals are a favourite connector of many hackers and makers. They’re easy to use, and they create a good electrical connection with any wires clamped down. You can even fit a few different wires into a single terminal, depending on the wire gauge. Instead of trying to use Dupont cables to attach to the DIP pins (which always seem to fall off during debugging, causing all sorts of issues until you notice), you get a reliable, low-resistance connection.

The designer, FLOW_STATE, has also created and included a 3D-printed housing for the board. This allows connection to the USB port on the Nano while protecting everything else from accidental shorts. It’s certainly not weatherproof, but it’s great to have a case to keep things looking neat and tidy and keep the Nano clear of debris. It might be a simple project, but having a few breakouts like these on hand can make fast prototyping much easier, allowing you to focus on implementing your idea instead of messing around with loose connections.

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Many hackers and engineers have come across the HP hexadecimal seven-segment displays, like the 5082-7359 single-digit, for example. All you need to do is provide power and ground and you’ve got an easy way to display four bits of a bus, or just easily control the display from any number of other outputs. These displays were not only useful, they had a very unique look and aesthetic that everyone loved. Unfortunately, they haven’t been made in the better part of 50 years and so as they got bought and used up, supplies dwindled and prices shot through the ceiling. Well, this Breadboard Hexadecimal Display uses the exact same concept of a built-in decoder to display a hexadecimal representation of its inputs.

In this case, instead of including a custom-designed decoder chip inside the LEDs, an extremely inexpensive microcontroller (the Holtek HT66F3185) has been attached to the module and a single pin header is attached for easy breadboarding. There’s no reason these have to be limited to a breadboard, though! They could easily be mounted on PCBs or anywhere you want to display hexadecimal values. A great application, and a very natural one for this type of display, is showing the contents of data and address buses for homebrew computers. You could single-step your machine and see exactly what is being put on the bus!

Combining a cheap microcontroller and a 7-segment display to re-create the self-decoding displays of decades past is an awesome idea and we really hope to see this product do well. Due to the demand for this type of display and the very neat modular packaging used here, hopefully we’ll start to see these popping up in all sorts of neat projects.

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Flipper Zero has taken the world by storm and as such there is a healthy plethora of Flipper Zero add-ons and doohickies available on Tindie. To be fair, there are so many that a Flipper Zero accessory needs to really stand out to make us notice! This pair of distinct owl-shaped eyes caught our attention, but it isn’t just a decorative PCB, it’s a 940nm IR Blaster Dazzler add-on!

Supplied fully assembled this add-on attaches to your Flipper Zero to dramatically increase the capabilities of its infrared transmission software. The 32 onboard high-intensity IR LEDs offer a much higher power output, projecting a much stronger signal than the built-in IR. This means the Flipper Zero can be used as a highly capable universal control to manage a wide range of devices, from televisions to less obvious air conditioning units, heaters and more.

If you want to go fully custom, another interesting application for IR is in data transfer. Whether you want to emulate protocols like IrDA or experiment with Ethernet over IR, there are a lot of neat things you can do with infrared, especially if you have a sensitive infrared sensor!

When it comes to infrared remote controls, the Flipper Zero scene has lots of people experimenting with IR so it’s not hard to find repositories such as this one with a large database of IR remote codes for you to experiment with.  Of course, our caveat should be to remind you to only target devices you own or those for which you have express permission to do so.

The board is powered by the Flipper Zero 5V supply and the PCB is made to dissipate the heat produced by the onboard LEDs, so it’s a nice design from an engineering standpoint as well as a really cool aesthetic. Boost your IR experiments and control devices from ridiculously long distances with this Blaster Dazzler!

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Many projects that are controlled via laptop or single-board computer just need a bunch of GPIO to control motors, servos, relays, etc. Some single-board computers have lots of built-in GPIO pins, but there are still lots of applications where extra GPIO can come in handy. This 24-channel USB GPIO controller is a neat little board that can even handle up to 45V on its outputs!

Another nice benefit of using USB is that you can easily isolate it using a USB-USB isolator, allowing safe interfacing with projects that might be using high voltage or at different ground potential. With 150mA drive per output, it can easily drive relays and other coil-based devices, another great feature. You can use the USB Vbus supply, or connect an external 5V power supply if you plan on driving many outputs at high currents.

The whole thing is controlled with a very simple AT command interface, much like modems and the ESP8266 AT firmware. This makes it simple to get up and running quickly, enabling fast prototyping. It can be a great accessory to have on the bench if you just want a quick GPIO and don’t want to program a microcontroller. Easily test LEDs, motors, and just about anything else that GPIO can control!

We’d also like to highlight that this seller is based in Sri Lanka, which is very cool. We are happy to have them on Tindie!

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The Mac, launched in 1984, was a huge watershed moment in computing history. Though GUIs and mice had been done before, Apple was the first company to really bring those concepts to computer users of all types. And those computers (plus their many follow-ups) are still loved and cherished by their owners. Taking care of vintage computers can be difficult – mechanical parts can fail, power supplies can damage ICs, and hard drives screech to a halt. But, with this awesome Optical ADB Mouse replacement board, you can keep your ADB mice going without worrying about the old ball mice mechanism.

Some collectors might hold their nose at the thought of getting rid of the ball in the mouse, but the reality is spare parts are near impossible to get, and if your ball mouse is failing or outright broken, optical replacement boards like this are a great way to extend the life of your hardware while retaining the original look and feel!

Plus, for those of us who were around before optical mice (man that statement makes me feel old!), ball mice were, generally speaking, never really that precise or smooth unless maintained constantly, and used with a really good quality mousepad. When optical mice came around, we ditched ball mice as quickly as we could. They do have a certain nostalgia, but that nostalgia can quickly fade when trying to remove wound-up hair, dirt, and dust from the rollers inside.

So if you’ve got an ADB-compatible machine (from the original Mac all the way to some of the NeXT computers and beyond) and want to restore your mouse, this is a great way to do so!

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