news
Open Hardware/Modding: Minimalist Transceiver, DIY, Raspberry Pi, and More
-
Raspberry Pi ☛ Build an [Internet] radio
In Raspberry Pi Official Magazine #167, we used a trick with a capacitor to get a reading from an analogue sensor. The best — and most reliable — way for Raspberry Pi to detect analogue inputs is by using an analogue-to-digital converter (ADC) chip, such as the MCP3008, which offers eight input channels to connect sensors and other analogue inputs. This not only eliminates the need for the capacitor, but it allows you to get more precise and instant readings across the entire range of the sensor’s outputs.
In this tutorial, we’ll hook up a potentiometer to an MCP3008 to control the brightness of an LED by turning the knob. We’ll then add a second potentiometer and create an [Internet] radio, using the two potentiometers to switch the station and adjust the volume.
-
Hackaday ☛ A Thoroughly Modern Minimalist Transceiver
At its heart are three integrated circuits, the familiar Si5351 as a transmit VFO, an Si4372 receiver, and an RP2040 tying it all together. This microcontroller functions both as controller, and as an ADC to provide a software defined radio via its USB port. The Si4372 having an internal SDR architecture and its output being digitized again is not lost on us.
-
Hackaday ☛ Corners Lifting On 3D Prints? Guide Gives Prevention Tips
The most effective methods involve modifying the model itself to reduce or eliminate stress points. One such method is to break the model’s footprint into multiple zones with a shallow grid. Instead of one big flat bottom, the object has multiple smaller ones. Because big flat areas are more susceptible to warping than small ones, turning the bottom into a grid pattern helps spread those stresses out and prevent lifting.
-
Hackaday ☛ A Split Keyboard Designed For Human Hands
A surprising number of things we use in everyday life retain most of their design cues from their 19th century ancestors. The bicycle retains the same basic design as it had in 1890, as does the sewing machine, the toilet, the car, and of course, the keyboard and the QWERTY layout from old typewriters. But we aren’t doomed to have our technology perpetually living in the past. [Paul] wanted a keyboard designed around human hands, rather than being designed around a machine, so he built this unique split keyboard.
-
Arduino ☛ Building a DIY handheld thermal camera for work and play
Dumont’s camera design relies on the Seeed Studio MLX90640 thermal imaging sensor. Like all sensors in this class, it works by using a grid of thermopiles to detect the tiny amount of heat imparted by incoming infrared waves. The MLX90640 has a 32×24 array, which is the raw resolution of the thermal image it produces. It spits out the raw data over I2C, so Dumont needed a way to do something with that.
-
Wildlife/Nature
-
Pimoroni ☛ In This Garden, a Raspberry Pi Is Keeping an Ear on the Birds
BirdNET-Go uses a USB microphone to listen for birds. Using machine learning BirdNET-Go identifies the birds before pulling beautiful illustrations from a local database. The images are then used to populate a collage that is displayed on our super-crisp Inky Impression 13.3 E Ink®, 1600 x 1200 resolution display. The build is housed inside an IKEA A4 picture frame.
-