It wasn’t that long ago that if you had an optical microscope in your electronics shop, you had a very well-supplied shop indeed. Today, though, a microscope is almost a necessity since parts have shrunk to flyspeck-size. [Maker Mashup] recently picked up an AD409 and posted a video review of the device that you can see below.
The microscope in question has a 10-inch screen so it is a step up from the usual cheap microscope we’ve seen on a lot of benches. Of course, that size comes at a price. The going rate for a new on is about $400.
If the 10 inch screen isn’t enough, you can connect the microscope to an external monitor. That does disable the onboard monitor, though. The microscope offers plenty of space to solder under and has a removable lens and filter so you can add filters or even put on a wide-angle lens.
BioAmp EXG Pill is an open source biopotential analog front-end (AFE) module from Upside Down Labs. Based on TL074 quad low-noise JFET-input operational amplifier, the EXG Pill works as a single channel biopotential amplifier that can amplify low magnitude electrical signals produced by our body. The EXG in the name is a placeholder. Replace the “X”, and you get EEG, ECG, EMG and EOG. And yes, the EXG Pill can measure all these signals if you configure it appropriately and use the right firmware. BioAmp EXG Pill can be interfaced to any 5V microcontrollers. The analog output from the module can be sampled by internal ADCs of microcontrollers or external ones.
The project is completely open source, allowing you to get a copy of all the source files, and modify and redistribute them as you wish. BioAmp EXG Pill v1.0 will be soon launched at Crowd Supply. If you want to get your hands on one, be quick to subscribe to the project page at Crowd Supply. Once the project is active, you can pre-order the modules.
We asked you to rethink what displays can look like and you didn’t disappoint. From almost 150 entries the judges have winnowed the list down to ten projects which are awarded a $500 prize and will go on to the final round of the 2021 Hackaday Prize in October
In a world where there’s an HD (or better) display in every pocket, it is the oddball ideas that tend to turn heads. High on that list is a volumentric display that levitates a tiny foam ball on ultrasonic transducers to draw 3D color patterns before your eyes, or the volumetric display shown above that works with a sheet of film and motors. Or how about a take on a laser projected display that uses a phosphorescent screen so that the path of the laser persists, fading in time for the next infrequent update.
Mr. Blinky created this homemade Arduboy using custom PCB, modules and all through hole parts:
For the Arduboy contest I took the opportunity to design a custom PCB for a homemade Arduboy that uses only through hole parts and easy to obtain modules. In addition to that I wanted to make it stand out from other Homemade Arduboys by using some other then usual parts.It uses a Teensy 2.0 as core, a 1.54″ OLED display, 2 x RGB LEDs, a 16MB flash chip for games, a Real Time Clock and has support for two kind of buttons. Below an image that shows all the parts used.
As you dive deeper into the world of electronics, a good oscilloscope quickly is an indispensable tool. However, for many use cases where you’re debugging low voltage, low speed circuits, that expensive oscilloscope is using only a fraction of its capabilities. As a minimalist alternative for these use cases [fhdm-dev] created Scoppy, a combination of firmware for the Raspberry Pi Pico and an Android app to create a functional oscilloscope.Read more on Hackaday…
Bring your small projects to life with this SAMD21 dev board that is perfect for running CircuitPython:
A small but powerful SAMD21E18A powered micro dev board designed to be easy to use with direct support for Circuit Python! Get started with i2c projects using the onboard STEMMA/QWIIC connector or easy access to SPI pins and more.
The 5V power in is protected by a Schottky diode allowing up to 500mA of current, as well as a 3.3V pin which can sink up to 500mA between the microcontroller and connected devices.
This board also features a comfortable and easy to press reset button with smooth tactile action.
[Kerry Wong] isn’t afraid to get his hands dirty, and is always more than willing to open things up and see what makes them tick. This time, he reviews and tears down the Topshak LW-3010EC programmable DC power supply, first putting the unit through its paces, then opens it up to see how it looks on the inside.
The Topshak LW-3010EC is in a family of reasonably economical power supplies made by a wide variety of manufacturers, which all share many of the same internals and basic construction. This one is both programmable as well as nice and compact, and [Kerry] compares and contrasts it with other power supplies in the same range as he tests the functions and checks over the internals.
BioAmp v1.5 is a single chip Bio-potential amplifier for recording any Bio-potential signal non-invasively. It’s compatible with Backyard Brains Spike Recorder, which you can use to record and visualize all the Bio-potential signals.
Oak Dev Tech designed this stackable LiPo battery backpack for the Adafruit QtPy:
What is it?
A LiPo Battery Backpack specifically designed to work with the Adafruit Qt Py and board with similar 5V, GND, and 3.3V pin configurations.
This little backpack not only brings LiPo Battery power to your Qt Py, but also battery charging so you can easily recharge your project
Why did you make it?
The QT Py was wildly popular and many were asking how to use a LiPo with the board. With that question the LiPo Power Pack was born.
What makes it special?
It’s designed specifically to work with the footprint of the Adafruit Qt Py (all variants) and the seeed studio Xiao making it an obvious choice for maintaining the smaller footprint while still bringing LiPo battery capabilities to these devices.
From Glen Akins (@bikerglen):
This project is a single RGB LED that is controlled over USB using a command line interface from a serial terminal window. A PIC16F1459 microcontroller implements the USB communications device class (CDC), processes the commands received from the user, and controls a single APA106-F8 8mm round RGB LED.
The USB CDC causes the PIC to appear as a serial port to the host computer. At this point, any terminal emulator software can be opened to access the CLI, and send commands to control the color and brightness of the LED. The APA106 addressable LED protocol is identical to the Neopixel / WS2812b protocol.