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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
max current rating of USB connectors from PCs and laptops?
Hi, I googled and found most USB connectors' current ratings are from 1A to 1.5A. Can I safely assume that is also the current rating for PCs and laptops used? On the delivering...
Wednesday, 1 September 2010 - 03:27
Negative voltage for and LCD's contrast level. How?
Hi, I have this LCD, whose seller's spec is so scarce with info that I don't know how to generate a negative voltage for the LCD's contrast. The LCD is at http://www....
Sunday, 29 August 2010 - 04:41
How would I find/make a connector for such LCD (attached)
Hi, Attached is the LCD I am looking to use. I have a hard time of finding ways to interface with its connector for prototyping and breadboarding. Any tips how to do so? I...
Thursday, 26 August 2010 - 05:44
7-segment LEDs get hot even when multiplexed
Hi, I am using the dual 7-segment LEDs Schematic of the 7-segment is at http://www.es.co.th/Schemetic/PD... . It's a common anode with 15mA currnet to light each segment. I use...
Sunday, 4 July 2010 - 08:31
STK600 high-voltage programming on a "dead" ATTINY
Hi, I have a "dead" (meaning messed up fuse bits) ATTINY45. And I just inherited an STK600 kit. I read http://support.atmel.no/knowledg... and follow the links on serial/parallel...
Tuesday, 22 June 2010 - 05:53
74HC154 and LED matrix question
Hi, I am facing a problem that I can't seem to figure out. I will have a schematic drawn up, but here is my experiment. 1. TWO common cathode matrices. The matrix's spec is at...
Friday, 18 June 2010 - 08:12
ATMEGA8-16AU (TQFP 32-pin) package--2 extra ADC pins?
Hi, The ATMEGA8-16AU TQFP 32-pin package has two additional ADC pins, unlike the ATMEGA8 PDIP format, 28 pins. From the spec, the two extra ADC pins are pins 19 and 22. They are...
Monday, 14 June 2010 - 01:49
To drive the anode rows of a LED matrix, I need PNP or NPN?
Do I need PNP or NPN transistors? I use 8 pins from the ATMEGA8. Each pin will ultimately turn on and off each of the rows. Do I need PNP or NPN transistors? I know I will need...
Wednesday, 9 June 2010 - 05:30
0.1uF cap can be used for all VCC and GND pins?
Hello, I see that there are AVR microcontrollers, for example, AT90USB ones, have more than one VCC and GND pins. Standard practice is to put a 0.1uF cap (non-polarized) between...
Friday, 21 May 2010 - 05:05

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