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Clarification on decoupling caps layout
Hi, I am doing a breakout board for an IC. I have one 0.1uF cap for each pair of VSS and VCC. However, I do have one question the way how the decoupling cap is laid out with the...
Thursday, 28 October 2010 - 06:29
Looking for fast (assembly ok) primitive graphic routines
Hi, I've made an LCD driver work with an LCD I have. I would like to know if there are free/open source AVR, ATMEGA8/168/328, fast (assembly is fine) graphics routines, e.g.,...
Monday, 18 October 2010 - 03:18
Decent delay with nanosecond granularity
Hi, The include file support _delay_ms() and _delay_us() calls but not _delay_ns() call, that is, delay a number of nanoseconds. How would I implement a delay_ns() using F_CPU,...
Sunday, 10 October 2010 - 00:14
What's so good about AT32UC3A's EBI (External Bus Interface)
Hi, Trying to decide to use AT32UC3A0512 (144-pin), which supports EBI, or AT32UC3A1512 (100-pin), which does not. Besides using EBI for SDRAM interface, anything else that EBI...
Monday, 27 September 2010 - 21:09
Basic question the LM317 adjustable voltage regulator
ok, I skimmed over the spec and see lots of LM317 calculators (like http://www.whatcircuits.com/lm31... ) on the net that have one resistor held constant (R2) and varies the Vout...
Friday, 24 September 2010 - 01:52
Does AVRDude support 32-bit AVR UC3 micro-controllers?
Hi, I have built the USBASP programmer. And it has been working well. With 32-bit AVR UC3 micro-controllers, I take the programmer should work for these 32-bit microcontroller...
Tuesday, 21 September 2010 - 07:33
Voltage regulating approach for the Nokia 1100 LCD screen
Hi, I managed to get a hold of an old Nokia 1100 cell phone with the LCD. Below are the pinouts of the LCD. (See also http://www.sunbizhosting.com/~sp... ) The 1110 service...
Tuesday, 21 September 2010 - 04:43
Basic questions about interfacing with graphics LCDs
Hi, I have been trying to interface with graphics LCDs that have V0 and VEE pins besides the VCC and GND pins. I have browsed many datasheets of such LCDs. V0 is for "bias supply...
Friday, 17 September 2010 - 02:25
Painful in making the Hantronix 240x64 GLCD to work
Hi, I have a Hantronix 240x64 graphics LCD. It's controlled by the T6963C controller. From http://www.hantronix.com/2_2.html, I believe my LCD is the one with "240x64 EL,(W)LED...
Monday, 13 September 2010 - 04:35
Possible to have the ATTINY85 run at 16Mhz via internal OSC?
Hi, A friend of mine thinks that an ATTINY85 can run at 16Mhz with its internal oscillator. Reading the spec: By default, the ATTINY85 runs at 1Mhz using the internal oscillator,...
Thursday, 9 September 2010 - 02:31
A programmer for the ATMEGA series with TQFP-32 format?
Hey all, I am interested in making a programmer for the ATMEGA TQFP-32 format. (PDIP, no problem, and I have done a number of them.) The key to making a programmer for the TQFP-...
Monday, 6 September 2010 - 19:11
Macro that I can do something like "PORTC.4 = 0"?
hi, I looked in avr/io.h and am aware of _BV(x) macro used along with PORTX and the OR and AND operators to flip bits. Is there a macro so that I can do something like "PORTC.4 =...
Thursday, 2 September 2010 - 06:17

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