A crowdfunding campaign on IndieGoGo for Nybble, described as the “World’s Cutest Open Source Robotic Kitten”, has already achieved 95% of its $50,000 goal and there’s over 3 weeks left for it to increase its pre-release sales. So what is Nybble and why would you want one? This video, made for its Indiegogo campaign reveals that it’s […]
In numerous RF synthesizer chips lies an inverter with input and output pins for making a reference crystal oscillator clock. I built some discrete chip inverter xtal oscillators with 74HC series logic gates to better examine them. You’ll quickly recognize the oft-used Pierce oscillator topology with 1 trimmer capacitor to tweak the fundamental frequency which
Actual microcontrollers have powerful bidirectional I/O ports, and you can use different techniques to fully exploit such capabilities. Recent Design Ideas described the “Charlieplexing” method as an effective way to drive M=N×(N–1) LEDs using only N bidirectional I/O ports and N resistors (reference 1 and reference 2). Unfortunately, using Charlieplexing allows you to drive only
“Chipiplexing” efficiently drives multiple LEDs using few microcontroller ports Continue Reading
Readers of Hackaday are no strangers to using a microcontroller to push data to WiFi. Even before the ESP8266 there were a variety of ways to do that. Now Microchip is joining the fray with a $29 board called the AVR-IOT WGthat contains an 8-bit ATmega4808, a WiFi controller, and hardware-based crypto chip for authenticating with
During experiments with digital voice mode in hamradio I discovered a nice project describing an adapter for D-Star, DMR and other digital modes based on an Arduino Due and a little PCB to be put on top. This unit is called the Multimode Digital Voice Modem or MMDVM (see [1]). It seems that this is
Homebrew Multimode Digital Voice Modem adapter Continue Reading
If the WiFi connectivity goes down, this will reboot the router. Story There are times you are unable to connect to your WiFi router. This can be especially problematic when you have increasing number of WiFi dependent IoT devices. Many times, the remedy is to simply reboot the router i.e. unplug the power cord, wait
This SMPS can be powered with low input voltage, from 5 VDC to 15 VDC. Adjustable Output Voltage: + 92 Vdc to +340 Vdc This assembled module of the SMPS can be used as power supply, for guitar pedal booster, effects stompbox, with subminiature tubes ( CK series, 5702, 5744, 5718, 6112, 6021, 6286, …
One of the essential elements of building IoT project is the ability to connect devices. Wi-Fi and Bluetooth are good low cost choices, but they work only at close ranges, or in hotspot areas. When the device needs to be at a remote location GSM is a good and easy to setup option. In this
Send and Receive SMS with GSM SIM900 Arduino Shield Continue Reading
Many people have created their own 3D printed version of the famous Scouter from the Dragon Ball franchise, but maker Marcin Poblocki wanted to go one step further and add a functioning screen to his prop. Before he could get to that, however, he needed to model the Scouter itself, a job he did in Fusion
Arduino adds a working screen to a Dragon Ball Scouter Continue Reading
Description OPS242-A Short Range Radar Sensor The OPS242-A is complete short-range radar sensor providing motion detection, speed, and direction reporting. All radar signal processing is done on board and a simple API reports the processed data. Flexible control over the reporting format, sample rate, and module power levels is provided. The sensor has full FCC/IC
