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Consistently getting a stable 4.26V for a 3.3V LDO :-(
Hi, I bought some TO-92 pieces of ST Microelectronics' L78L33ACZ, a 3.3V LDO. This LDO has 3 pins, Vin, GND, and Vout. For Vin, I feed in 5V from the my USB and is bypassed with...
Tuesday, 10 May 2011 - 03:35
Can't seem to decipher problem with inline assembly
Hi, I have the below program, trying out inline assembly. #include void asmCode(); int main (void) { asmCode(); return 0; } void asmCode() { asm volatile( "...
Monday, 2 May 2011 - 05:08
Some pin usage questions
Hi, Got the below questions that I really want to be clarified on. 1. If I have a pull-up on a pin. Is it possible still using that pin for OUTPUT? For INPUT, that's no problem...
Sunday, 1 May 2011 - 05:17
Question on mix voltages of 3.3V and 5.0V
Hi, Consider the schematic at http://www.ikalogic.com/scanalog... 1. The 23K256 ICs take 3.3V for their VCC and GND pins. They are SPI slaves. The ATMEGA takes 5V. The MOSI and...
Friday, 29 April 2011 - 06:33
Optimizing a small assembly routine to do a lookup
Hi, First time with AVR Assembly Language. Read the awesome tutorial by Gerhard Schmidt at http://www.avr-asm-tutorial.net . Objective: Given a byte, do two lookups using each...
Wednesday, 6 April 2011 - 17:15
Any cheap stereo audio power amplifier?
Hi, I see that the TP150 or its derivatives are good candidates. See http://focus.ti.com/lit/ds/symli... . But, they are expensive. Is there is a cheaper alternative, e.g., with...
Thursday, 24 March 2011 - 22:57
Sample AT32UC3L064 project with wiring, e.g, a dev board
Hi, Just bought a couple pieces of AT32UC3L064. Looking for a sample AT32UC3L064 projects or dev board. Thanks!
Tuesday, 22 March 2011 - 04:23
Getting exact number of cycles per sec or usec of a uC
Hi, I am reading http://www.atmel.com/dyn/resourc... . Well, more like browsing, since it 800+ pages long. So, from page 783, max F_CPU is 50Mhz. Exactly how many cycles, say,...
Monday, 21 March 2011 - 19:51
Adjustable voltage regulator (TC1174 device) questions
Hi, I am planning to use the TC1174 to regulate a 5V down to 3.6V. Please see the attached schematic. Vin = 5V and max. 500mA can ne drawn from this Vin. Vout = 3.6V and max...
Monday, 14 March 2011 - 01:17
Please comment on the attached design/wiring
Hi, I am designing an adapter for an SMD part, that is, SMD to PDIP adapter. This part has a lot of VCC and GND pins. So, decouple these sets of VCC and GND pins with 0.1uF...
Saturday, 5 March 2011 - 17:21
Need bitmap routines for graphics LCD
Hi, I found graphics routines for LCDs (not specific to any LCD). But I am also looking for bitmap routines, such as drawing bitmaps with clipping abilities. Any pointer would be...
Tuesday, 1 March 2011 - 06:09
USB to RCA (Yellow/Red/White) cable question
Hi, Nowadays when you buy a digital camera, they give you a USB-to-RCA cable so that you can view the pictures on your TV. See attached image. I am thinking of doing a TV project...
Monday, 28 February 2011 - 02:09

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