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Android battery
Hello. I need longer run time to android phone (Nokia-1), it looks that replacing battery to bigger one does not work, is there any way to tell the phone that there is a bigger (...
Monday, 25 June 2018 - 16:16
GPRS sim800
Hello. I use sim800 to send data to webpage but update (data transfer) takes too long, is there faster ways to send data, or faster hardware instead of sim800, Below is used (...
Thursday, 9 February 2017 - 09:06
Proportional valve driver
Hello All I need circuit (or idea) how to drive proportional valve -10...0...+10V, using xmega D/A converter (0...3.3 V) Ana  
Sunday, 15 January 2017 - 18:32
battery curren measurement
Hello I should measure battery charging and discharging current, battery is big (forklift, 48V 400 Ah), so charging current can be 50...100 A disharging can be ~200 A. I have seen...
Monday, 16 March 2015 - 13:09
Pin pull-up or pull-down
Chip is xmega-e5, one input pin (async) is connected to button, for waking up slpeeping cpu, which is more energy efficient way button connects pin to ground pulled up with...
Monday, 2 March 2015 - 20:49
remap port pin
uc = Xmega32E5, I try to change USART TXD0 from  from pin PD3 to pin PD7 and back, no success, tx stays all the time at same pin which is first selected my code: while(1...
Tuesday, 25 November 2014 - 17:34
gps PPS signal
Hello all I hooked PPS signal from PA6C-V02 GPS module to xmega32E5. What is time when PPS signal arrives (rising edge). Module sends also GPZDA message (timestamp), is it some...
Friday, 24 October 2014 - 14:53
commandline programming EEPROM
Hello. I am trying to program xmega32e5 using atprogram.exe, erase and hex file goes ok, but eeprom (eep) is corrupted somehow erase chip command:atprogram -t avrispmk2 -i pdi -d...
Thursday, 25 September 2014 - 20:27
Battery life calculation
Battery is 1000 mAh, Tiny44A in powerdown mode takes 5 uA current, after every 2 min it wakes up and sends data, current is 10 mA during 0.2 sec, after that it goes to powerdown...
Sunday, 24 March 2013 - 08:05
RF dBm and distance
I have receiver module (Nordic semiconductor nRF24L01), input sensitivity is -82 dBm, max distance is about 80 m, if I change module to nRF24L01+PA+LNA, which input sensitivity is...
Monday, 25 February 2013 - 08:53
Xmega watchdog reset
How can I detect if XMEGA32A4U is started as normally (power on) or after watchdog reset.
Saturday, 2 February 2013 - 17:47
Xmega32A4U UART
I have following problem with xmega32a4u uart D interrupt: If I have PDI cable connected (AVRISP MK2) everything works, if I disconnect PDI cable everything still works, if I...
Friday, 5 October 2012 - 20:50