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ATMega 1284P (Breadboard) ADC voltage Readings...
Do you get the same fluctuations when you read the voltage of a 1.5 volt battery?
Sunday, 21 June 2015 - 21:50
ATmega128RFA1, RTC crystal won't start.
There can be substantial variation between boards when using high-impedance devices,  I suspect depending on subtle variations in the crud that has collected over time. For...
Thursday, 11 June 2015 - 18:11
ATmega128RFA1, RTC crystal won't start.
How do you know it is not waking up, as opposed to waking but getting all I/O blocked by some interrupt race?  Talking to the radio before it is ready can have strange...
Tuesday, 9 June 2015 - 22:43
Looking for a memory leak
A static variable can be optimized away if nothing in that file ever changes its value.  For example static myvar=42; could just substitute 42 everywhere myvar is used....
Monday, 8 June 2015 - 17:13
Web server and TCP/IP over USB
As for the original question, RNDIS is supported in most unix kernels but as far as I know not on Macs.  The AT90USB1287 jackdaw firmware (a 6lowpan translator) contains code...
Tuesday, 2 June 2015 - 15:41
Where and how to begin ?
My suggestion is, rather than to get some hardware and then to search for some applications for it, to find some interesting applications and then buy the hardware to duplicate it...
Monday, 25 May 2015 - 21:41
Using differential ADC of ATMega256RFR2 evaluation board
Is the ADC being switched to other modes in between measurements? If not,  what values do you get if you leave the ADC powered up and connected to the same channel between...
Thursday, 21 May 2015 - 16:55
Pump controller using atmega128 going wrong due to EMI
Disable the pump power to see if the resets were coming from contactor coil as opposed to pickup from the pump power circuit.  If so energize the contactor from a battery to...
Thursday, 21 May 2015 - 16:44
Simple automatic MOSFET shutdown
How big is the battery, much current is needed, how much can you reduce that by sleeping the MCU, and can the circuit operate without voltage regulation? Just monitor Vcc and...
Monday, 11 May 2015 - 12:07
Animation techniques with no frame buffer?
The Macintosh Quickdraw library (1984) was optimized for speed and smoothness of partial redraws.  Well-commented 68000 source code is available.   http://en.wikipedia....
Sunday, 10 May 2015 - 17:35
Arduino Uno with car battery
A single LiFePO4 cell works well for powering micros. The allowable voltage is between 2.0 and 3.65 volts with most of the capacity around 3.3 volts. You can connect it directly...
Thursday, 7 May 2015 - 21:46
Seeking low power wireless recommendation
It is true that the receiver wakes when detecting any RF activity on the channel. Typically with 802.15.4 it stays awake until the start of the next strobe (in contikimac the...
Friday, 1 May 2015 - 17:00

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