Seven segment LED displays are brighter, more attractive and provide a far viewing distance as well as a wider viewing angle as compared to LCD displays. The major drawback of using seven segment LEDs is they are resource-hungry. Time-division multiplexing is the most common technique of interfacing 7-segment LEDs to microcontrollers. With this technique, an 8-digit seven segment LED display with the decimal point requires at list 16 I/O pins of the microcontroller, which is quite a lot. Consequently, their use with low pin-count microcontrollers (such as PIC12F series) is not practically feasible. SPI7SEGDISP8.56 is our latest version of the MAX7219 based serial seven segment LED display module that will allow you to add 8 digits of seven segment LED displays to your project using only 3 I/O pins, and provides full control of all the digit segments including decimal points. You can even cascade two or more of these modules together without sacrificing any extra I/O pin.
Uses only 5 pins and SPI.
This is a small daughter board that fits into the socket of the "Sally" custom CPU in the Atari 800XL, 65XE and 130XE microcomputers (the RF shield must be removed, otherwise the daugher board won't fit inside). It replaces that CPU with a CMOS, modern, low-power, fully static, currently in production W65C02S CPU and some auxiliary logic.
The package contains the auxiliary logic chips, the capacitors, the resistances, 40 pin strip and the 4 layer board. Suitable W65C02S CPU is not included, you must search for one these, as recommendation, from trusted distributors.
An open source convention badge. The idea behind this is to have a very low cost, low power electronic badge. These could be built just for fun, or if you're throwing a conference, feel free to use the PCB as the badge, maybe build some, maybe let the folks at the conference build them.
Electronic badges have gotten pretty hip, but they seem to suffer from two primary problems: They are very expensive, and they need a lot of batteries.
The goal of the Open Badge Project was to build a badge that costs $5 or less and can run for a day or more on one 2032 battery.
The badge as it stands right now will only cost $5 if you build A LOT (1000 or more). The cost is closer to $6 or $7 for smaller batches at the moment, but that's still pretty reasonable.
The badge itself runs on a microprocessor called an ATTINY85. It has 8K of program space, 512 bytes (yes, bytes) of memory. That microprocessor then drives 3 shift registers. One for the button input, and two for the display output. Shift registers shouldn't be used to drive LEDs, but it works, and doing it this way keeps the cost down.
The AEMSUCA is a 15x20mm board for the AEM10941 Solar Harvesting IC from E-peas. It efficiently converts solar panel energy into SUperCApacitor charge, it even works with indoor light. It features two regulated outputs that are enabled when the supercapacitor has sufficient charge, and a low voltage warning that informs the user of impending shutdown when the supercapacitors run low. It easily integrates in other projects because of the castellated via's, and when soldered onto 0.1' pitch header it fits in a bread board.
This board is special because it integrates maximum power tracking, supercapacitor charging and two regulates outputs in a tiny and easy to integrate board. There's is no other board with so few passive components.
This is a small but powerful PCB based reflow soldering solution for use with low temperature (<200°C) solder paste at home. I did not design this PCB, you can check out the design here: https://github.com/DerSpatz/PCB-reflow-solder-heat-plate
However, I am selling this because at the moment, it is basically impossible to buy one of these for cheap. The closest thing is a $100 one on Adafruit or a similar vendor. These plates can be sold for much cheaper, but no one is doing it! I am here to fill that hole in the market, selling these boards for cheap to the masses.
It's small or even portable, and effectively can reflow solder without damaging or moving components (possible with hot air reflow). With an ATMega4809 microprocessor on board, it can follow 2 preset reflow curves and can have a target temperature between 140°C and 200°C for your soldering needs. It can also be programmed for custom curves, though it is certainly difficult and I have no experience doing it. It's a really cool open-source project that hasn't come to mass market, which I hope to help with!
DIY Neuroscience Kit -Basic is perfect for students, researchers and hobbysts alike who want to start exploring neuroscience by recording biopotential signals from their body to make amazing HCI and BCI projects.
Comes with pickups for heartbeat, brainwaves, muscle contraction, disposable electrodes, conductive gel, cleanup stuff, and all the electronics to make it work.
Noninvasive.
The Power Glove UHID (Ultimate Human Interface Device) is a modification of the 1989 Nintendo Power Glove that integrates an ARM microcontroller, WiFi communication and 9/10 axis IMU into the original device, allowing you to repurpose your infamous gaming accessory into a device with limitless possibility (imagination sold separately).
This a set of the boards used in the first iteration of the project. The boards are provided as-is without any additional components. You should be aware that integrating them into your own Glove will require a fair bit of DIY work (and a lack of squeamishness when it comes to modifying classic video game accessories).
Just what it sounds like: A big directory of different types of battery holders. Who knew that they were so involved?
Aretronics is the new company, started by ex-employees of All Electronics. Together we have decades of industry experience. We aim to provide the same fast, reliable service as we did at All Electronics, and stock even more, new, interesting and useful parts for your projects and needs. We offer hundreds of electronic and electro-mechanical parts and supplies at discount price.
This LED calculator will help you design your LED array and choose the best current limiting resistors values. To get started, input the required fields and hit "Design Circuit." Does the math for you, will output either a wiring diagram or schematic. Useful because it gives you defaults to start playing around with (who knows how many mA an LED draws off the top of their head? even I don't.)
This project aims at building an ultra low power adapter (< 1uA quiescent current) that you can bring onto modern smart energy meters to read the energy usage.
The optical interface consists of an IR photodiode to read data from the smart energy meter, and an IR emitter to send data to the smart energy meter. The infrared reader has an automatic calibration to ambient light conditions to be more resilient against ambient infrared light.
4 wires: VCC, GND, RX and TX. RX is for receiving UART data from a microcontroller, TX is for sending the optical data to a microcontroller. So usually you want to connect TX to the UART input of your microcontroller to get your readings from the smart meter. RX can be left unconnected if not used. The supply voltage may be between 1.8V and 5.5V.
Another online electronic components store.
An online electronic component dealer that's been around since 2009.
Pick the color stripes, pick the number of stripes, and it'll tell you what value the resistor you have in hand is.
The online store of somebody in England who makes small, specific purpose devices for electronics hobbyists. If you need something odd, chances are he's made such a thing already.
Simple board to test various USB cables! (Note the USB standard helps to identify these USB-C, cables that are compliant with the standard will have selected pins according to cable and connector specification release).
Plug in your cable to both sides and see which signals light up!
FOR CABLE USE ONLY. DO NOT EVER PLUG THIS IN TO A DEVICE, THE PINS ON ONE SIDE ARE ALL SHORTED TOGETHER AND THAT COULD BREAK IT!
You can buy the boards from just about any manufacturer and build them yourself. Hopefully your fine soldering skills are up to the task (mine aren't)...
An open-source, 35mm full-frame (36mm x 24mm) CCD mirror-less interchangable lens camera (MILC). The original goal of this project was to create a digital camera back to convert SLR cameras to DSLR cameras, but has since changed to build a full MILC.
This means that the project includes building a logic board with a system-on-a-chip, optical and ranging sensors, ports, storage media, an LCD screen... this is not a beginner's project. Nor is it a project for casual photographers.
Honestly, this site started as a joke. A weekend script tossed together to consolidate PCB orders from the Dangerous Prototypes team. It sat quietly and unnoticed until Hack a Day told the world. Turns out people like cheap, no-nonsence PCBs at near-China local prices and no-markup shipping. The original script, not even worthy of the word "store", ran for three years and handled tens of thousands of orders.
Over that time we've hacked together new interfaces to cool services in China, and cobbled them together into this store. It is highly experimental and many things are still a bit rough around the edges! Welcome, the PCBs are cheap and the 3D printing is amazing!
They even have Hacker Shops, which is where folks sell their projects (sometimes just boards, sometimes kits, sometimes assembled things).
This board helps test floppy drives of several different types:
- Standard IBM 34-pin drives (3.5" and 5.25")
- IBM PS/2 40-pin drives with embedded power connections
- Shugart 8" floppy drives
- Apple II (original Disk II)
- HP 34-pin drives (as found in many 9122 enclosures)
- HP 26-pin drives (found in older enclosures and machines)
- IBM 31SD and 51TD floppy drives
The board basically breaks out every signal to a control switch, indicator LED, or test point. It's not designed as a flux imaging tool--it's just a simple way to exercise features of a floppy drive.
There is an optional section of the board that is a step controller for the head stepper motor. This controller has an encoder wheel and a small 7-segment display. It will let you select and automatically step to a particular track.
Uses an ATmega328PB microcontroller as its CPU.
Scanned, browsable copies of every catalog Radio Shack ever released, from the very first in 1939 up until their last gasp in 2011.