Extremely cheap low-speed PC/USB oscilloscope with STM32 (STM32F042) microcontroller - variant of miniscope v2e with input amplifier (MCP6S21 PGA) added. This is minor update, but input PGA fixes problem with input leakage of STM32F042 allowing increasing input impedance at the same time. Quick specification follows miniscope v2a-d idea: very simple device streaming data in real time to PC; DLL and GUI (Win ...

While I waited for the Mini 7-Segment Clock v3 PCBs to arrive, I got to work on designing an enclosure. First, I exported the PCB from EAGLE to SketchUp. I then assembled a complete 3D model with all the necessary components. With the 3D model complete, I could then design an enclosure to house the PCB and know exactly what it's going to look like before printing it. I even incorporated a little cable strai ...

In this project, we will be making a mini weather station that measures temperature and humidity and transmits them wirelessly to a ground station, which displays the readings on an LCD display! It’s a fairly easy project and can be used either on its own or part of something bigger. For this project, we will be using: - RF 433 transmitter/receiver module cost: ~2.00 USD - DHT11 Humidity and temperature sen ...

Description The Mini Audio Amplifier project is a good choice for battery operated gadgets.  It is based on Texas instruments LM386 IC, provides high quality Audio. Specifications Wide power supply input 6 to 12 VDC 500 mW output @ 8 Ohms load Takes standard audio signal as input Low quiescent current drain 4 mA IC The quiescent power drain is only 24 mW when operating from 6 VDC Onboard preset for volume a ...

TwinTeeth Basic and Plus are open-source PCB mini-factories targeted to the electronic hobbyists. They are innovative fabricators of Arduino™ shield-size PCBs which help you to make PCB prototypes at home and learn a lot about mechatronics. It includes the following functions: UV Laser photoengraving on sensitive film or presensitized boards using an ultraviolet laser. Drilling vias and holes using any mini ...

Extremely cheap low-speed PC/USB oscilloscope with STM32 (STM32F042) microcontroller. Quick specification follows miniscope v2a-d idea: very simple device streaming data in real time to PC; DLL and GUI (Win32) are handling all the functionality, sampling: 480 kSps, 8 bit, single voltage range, streaming via USB FS with libusb (32/64bit) used as driver, record length: 4k to 1M defined in DLL; up to 512M samp ...

You’ll need these: HC-SR04 – Get this ultrasonic sensor from eBay.com.au for $2. SG90 Servo Motor – We’ve seen this servo selling for around $4 on ebay. Motor drive shield – You can get this expansion board for $5 online. If you’re new to APC we’ve been spending the last few months of this Masterclass looking at how to use the low-cost Arduino microcontroller in the real world. These little 8-bit controller ...

In a recent instructable Indigod0g described a mini weather station that works pretty well, using two Arduinos. Maybe not everyone wants to sacrifice 2 Arduinos to get humidity and temperature readings and I commented that it should be possible to do a similar function with two Attiny85's. I guess talk is easy, so I better put my money where my mouth is. In fact, if I combine two earlier instructables I wro ...

Quin Etnyre has been into all things Arduino since he was a kid. He already has 28 Instructables published, founded his own company called Qtechknow in 2012 which sells ArduSensors and a line of fun and educational kits and oh, he is still just 14 years old. His latest Arduino-based design is the Qduino Mini which is the first tiny Arduino compatible board to incorporate a battery charger and fuel gauge to ...