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How to use a lithium battery for a 3.3V low-consumption circuit?
Power just the CPU with a coin cell GPIO pin drives P-Channel Mosfet to switch power to the transmitter and sensor (regulator is optional) read the sensor send out data switch...
Monday, 23 January 2017 - 19:10
Reading 60V safely with MCU
Linear Optoisolator:
Monday, 12 September 2016 - 11:27
connect termistor to the ATtiny ADC inputs
You may also linearize the thermistor with a similar resistor in parallel, then let the AVR linear-interpolate the rest:
Monday, 12 September 2016 - 10:56
Old electronics
Old: any SOIC processor with leads not QFN or BGA, monochrome LCD displays Classical:thru-hole in general, DIP chips, 5V TTL logic. Ancient: Anything with an UV window on top,...
Friday, 9 September 2016 - 22:45
Only Unknown identifiers in AS7 debugger
- Uninstall AS7 - Sell all your Atmel stuff on eBay - Install MPLABX, Code Composer Studio or Keil ARM - Switch to PIC32, DSP or Cortex cores - Live a decent life focused on the...
Sunday, 3 July 2016 - 11:14
Issues with internal reference inaccauracies
Why not using a fuel gauge IC? those are laser trimmed inside the silicon to rule out inaccuracies:
Friday, 1 July 2016 - 05:12
Touch Sensing (Capacitive, Proximity, others?)
You sir should seriously consider showing your powers on TV : )  The only things that lit up when I touch are my phone and my GF lol
Friday, 1 July 2016 - 05:06
Using FreeRTOS in Atmel Studio 6.2
Got the same bug on AS7 here. Fixed it by copying the include paths to both the C++ and C compiler directories   I was using a main.cpp with a FreeRTOS port written in plain C
Friday, 1 July 2016 - 04:59
How to protect Oscilloscope inputs from overvoltages?
Years ago, had to design this 18KV fence charger for a start-up: They were really paranoid about their DSO and accidents, so we did this: - Wear rubber gloves - Used mostly...
Thursday, 30 June 2016 - 10:31
Touch Sensing (Capacitive, Proximity, others?)
The transistor is good idea, though I'd replace the BJT for a JFET, Mosfet or opamp/comparator IC BJTs (PNP, NPN) respond to current, they don't "see" skin charge. JFET (radios,...
Thursday, 30 June 2016 - 10:07
fsk over phone line ... help
Did a project a bag of years ago for alerts over landline:       Your bil of parts will begin with - 600:600 ohm coupling transformer. You don't want to mess with...
Thursday, 30 June 2016 - 09:49
[SOLVED]Removing click sound while muting and unmuting mic in earphones
I'd put the R-C circuit on V+ to fade in/out the mic bias. Just a thought.  
Thursday, 30 June 2016 - 09:22