Bridging ISM radio and wifi for lunch money
Johan discuss about ISM/Wifi bridge using RFM69, code and schematics is available on github. The ESP8266 has taken the maker community by storm and the hype is well deserved. Before the ESP we had the HopeRF ISM radio RFM12 and its successor RFM69. So is the ESP8266 an RFM69...
Continue ReadingARM bought by Japanese Softbank for 32 billion dollars
by Jan Buiting @ elektormagazine.com: Confirmed last Monday (18 July 2016): 100%-thinkware-firm-and-brilliant-bunch-of-Cambridge-mathematicians/computer-scientists, ARM, is to be bought by Japan's Softbank for £24 bn ($32 bn). In official words: the board of ARM is expected to...
Continue Reading“Chipiplexing” efficiently drives multiple LEDs using few microcontroller ports
by Guillermo Jaquenod @ edn.com 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...
Continue ReadingTV Tuner IR remote with a PIC16F684
Tahmid built a TV tuner IR remote with a PIC16F684: I then proceeded to write an IR transmitter using the PIC16F684 (using the MPLAB X IDE and XC8 compiler), following the timing information from the extended NEC protocol. In order to connect all the keys, I connected them in...
Continue ReadingHomebrew Multimode Digital Voice Modem adapter
Florian Wolters made his own version of MMDVM adapter: 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...
Continue ReadingNot a battery or a supercap, but a ‘thin laminate energy device’
Murata’s UMAL is a low-profile high capacity energy device. Designed to meet the demand for a slim high capacity energy source with a maintenance-free extended life cycle in wireless sensor nodes, the UMAL has charge/discharge and life-cycle characteristics superior to conventional...
Continue ReadingAccurately simulate an LED
Jon Roman and Donald Schelle have a design idea on how to simulate a high power led to test your driver circuit. Testing the driver circuit using LEDs, although easy, yields only typical results because the tests don’t factor in worst-case LED parameters and often generate...
Continue ReadingAdjustable HV Power Supply for Stompbox
This SMPS can be powered with low input voltage, from 5 VDC to 15 VDC and provided adjustable Output Voltage: + 92 Vdc to +340 Vdc. Can be used too, as power supply, for the Xenon Lamp, Nixie tube Clock, VFD display, Magic Eye, Neon, and too many others electronics circuits who need...
Continue Reading