Arduino Weekly Newsletter - Wednesday, December 31, 2014

Arduino newsletter

Top new questions this week: Choosing right Sleep state I'm planning on building an LED clock, but I want it to be lit only when I press the POWER button on my remote control. Using an IR receiver, which Arduino sleep mode should I use to reduce the ... arduino-uno led sleep   asked by LoganBlades 3 votes answered by mpflaga 0 votes What are the benfits of global variables over static class members? On an embedded system we use global variables often to keep dynamic memory consumption on heap and stack low. But global variables are also considered bad programming practice if they aren't used in a ... programming c++ variables progmem namespace   asked by Ariser 3 votes answered by jfpoilpret 1 vote Arduino motor shield will only work in one direction I have this Arduino motor shield which is hooked up with two DC motors. The board is the same as this one from Sparkfun. A PWM output controls the speed of the motor, and a digital out controls the ... arduino-uno motor arduino-motor-shield   asked by marlar 2 votes answered by embedded_guy 1 vote Discrete H-Bridge very low current output I have built two parallel H-bridges from "Design 1" on this page as you can see in the attached schematic. However when I apply the external power (VCC1 in the center of the diagram) the two motors ... motor current   asked by RickMeasham 2 votes answered by Mark Williams 1 vote Attiny85 and 433Mhz RF I have this cheap RF link that I had working with the Arduni UNO, but I wanted to make it smaller and ATTiny85 should do the trick. The RF module is connected (data pin) to PB3 on the ATTiny. But I ... attiny rf   asked by Jason94 2 votes answered by Omer 2 votes Help with parts identification from arduino starter kit from aliexpress Ordered an arduino starter kit from aliexpress Link The parts list they provide (as a jpg on the order page) is vague and not very descriptive, I've gone through most of the parts and am down to ... untagged   asked by PGT 1 vote answered by Ignacio Vazquez-Abrams 4 votes Serial interrupts? In a project, I'm using an EIA485 bus to send encrypted data packets. That works with Arduino's buffered serial, but it is kind of awkward, and I'm using none of the more complex stuff in that class ... serial interrupt   asked by Christopher Creutzig 1 vote answered by Ignacio Vazquez-Abrams 1 vote Greatest hits from previous weeks: avrdude: stk500_getsync(): not in sync: resp=0x00 I have arduino pro mini 5V, 16M ATMega328 and CP2102 USB to TTL. I've wired them like this: When I try to upload a sketch to the arduino board I'm getting the following error: avrdude: ... uploading arduino-pro-mini   asked by Deepsy 2 votes answered by kwc 5 votes Can two LEDs attached to different pins share their resistor? I'm designing an Arduino style board with built-in LEDs for several of the pins. To simplify assembly of the board and save on components, I was wondering whether it would be safe for those LEDs to ... led resistor   asked by microtherion 13 votes answered by Sylvain Leroux 10 votes Can you answer this? Arduino Pro Micro clone not recognized, flickering RX LED I have an Arduino Pro Micro clone that seems to be in some sort of reset loop. The RX LED is flickering very fast and very dim. The power led also seems to flicker at the same frequency but has normal ... arduino-pro-micro reset   asked by Professor Sparkles 1 vote

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