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Nokia5110demo
I tried to create a project to put this in but I just created 3 empty projects, so someone has to go delete them. Sorry. In the meantime, here's the file I was trying to upload.
Wednesday, 23 October 2013 - 01:44
Freq of RC lo pass filter?
The extra bit is another R across the C that makes it a voltage divider, so I guess f=1/2piRC where R is the parallel combination of the 2 Rs?
Sunday, 20 October 2013 - 14:12
Size of external cap on Aref?
Avcc goes right to vcc, no LC. Mega1280 reading all 16 channels. I see aref pulling down in a sawtooth shape every pass. I have a .1 to gnd. Paralleling another .1 across it just...
Wednesday, 16 October 2013 - 15:20
Does 75 terminator on H and V sync help?
Got some ghosting on a VGA cable going to a Digitalview SP1600 driving a 1024x768 LCD. Evidently there isnt a terminator switch on the RGB signals on the analog VGA connector on...
Friday, 13 September 2013 - 18:09
max fcpu at 3.3v?
I calculated the slope of the line in the ds for the 16mhz and 20mhz avrs to calc max fcpu at 3.3v. The 16mhz avrs are 10.66mhz max, so a 9.216mhz xtal is a good baudrate friendly...
Thursday, 29 August 2013 - 17:34
20MHz 100 pin megaAVR? ARM HW fp?
Looks like the 100pin mega1280 only runs at 16MHz. The 20MHz mega1284 only comes in a 44 pin pack. Anyone like to have a 20MHz 100 pin mega1284? Hey Eric, you reading this?
Thursday, 29 August 2013 - 14:26
VC0706 camera at 115200 on AVR
I wish one of you prolific AVR programmers would get one of these jpeg cameras from Adafruit. There is a sketch for an uno that uses a bitbanger to talk to the camera. The sketch...
Saturday, 17 August 2013 - 21:44
Anyone reading VC0706 jpeg camera?
All the messages on the adafruit forum have to do with reading this ttl camera with a pc based python program to read and write japlish commands to the camera. Stoopid old Bob is...
Sunday, 11 August 2013 - 04:21
Can I capture chars from usb dongle at 115200?
Hello folks. I'm making a datalogger with an uno that reads an analog and a thermocouple and streams a csv string like 'fp time, fp volts, fp temp \n' at 115200. Its sort of...
Sunday, 4 August 2013 - 16:16
Toggle switch bounce count tester
Enclosed please find my program that lets me flip my ACCO toggle switch and count how many switch closures it has counted. It worked fine from 20ms down to 1ms, then got multiple...
Saturday, 15 June 2013 - 17:43
ttl level serial line idles hi or lo?
The tx pin of the avr idles hi, start bit goes low. A MAX232 inverts this, so the rs232 line idles at minus volts, and the start bit goes hi. Good so far. USB plugs into arduino...
Sunday, 2 June 2013 - 15:49
Detecting a 104us start bit with a 52us interrupt?
I'm trying to get a sw uart working at 9600bps (104us per bit) so I can talk to my xbee shield on pd2 and 3. The tx seems to work ok, but the rx is still flaky. I use an interrupt...
Thursday, 23 May 2013 - 02:16

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