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Smoothing incoming and out going power supply
Hi, Please see the attached schematic. Notice of C1 then C3 for the 5V input. Then the 3.3V output has the reverse order of the ceramic capacitor first then the electrolytic. I...
Thursday, 7 February 2013 - 22:05
Simulating dual-ported SRAM with two pieces of SRAM
Hi, I am thinking of using two 32KB parallel SRAM chips as two banks, switching between writing and reading by two micro-controllers. One of the micro-controllers will be the...
Friday, 7 December 2012 - 18:35
Substituting a MOSFET with a NPN or PNP?
Hi, Please see the attached schematic (part of) that has T2, T3, and T4 using a MOSFET for amplifying the signal -- that is my guess, as I am not familiar with MOSFET at all. Ok...
Tuesday, 21 August 2012 - 19:59
Some basic multimeter questions -- not usage--but design
Ok, Say I would like to make a simple multimeter, maybe just voltmeter at first, with the ATMEGA8, which can take up to 5V. How would I make my voltmeter to measure even 24V...
Sunday, 17 June 2012 - 23:49
How to protect code being read with ATMEGAs and ATTINies?
Hi, To narrow down the question. How I would prevent firmware from being read from my ATMEGA8, TINY2313, ATTNY85, ATTINY84, etc.? I understand that by enabling the RSTDISBL fuse...
Sunday, 20 May 2012 - 18:49
BRNE 1 cycle or 2 cycles
Hi, I am using the ATMEGA8 at 16Mhz. The datasheet says that the instruction BRNE can take 1 or 2 cycles. Does BRNE below take one or two cycles? I believe it the offset to...
Sunday, 6 May 2012 - 06:28
What does "rjump ." mean?
I see the assembly instruction "rjmp ." with a dot '.' after the 'rjmp'. Does this mean it simply like a no-op jump but takes two cycles?
Friday, 4 May 2012 - 03:53
How would I connect a crystal to the ATTINY13?
Hi, The ATTINY13 does not have an XTAL1/XTAL2 pin but just a CLKI. Can I simply attach two 22pF to each of the crystal's terminals and connect in series one of the crystal's...
Saturday, 21 April 2012 - 13:19
Lots of questions on the CS4334 stereo DAC
Hi all, I am looking to do a sound/music project, basically streaming PCM data to the CS4334 stereo 2-channel DAC. The CS4334 datasheet is at http://www.cirrus.com/en/pubs/pr......
Friday, 13 April 2012 - 05:35
How can I disassemble a hex file?
This is for the ATMEGA8 hex file. Is there is a really good disassembler? Thanks
Thursday, 22 March 2012 - 00:20
Can JTAGICE MkII programmer use to program the ATTINY10?
Hi, I've looked over the net. And all I can find is that AVRISP MkII programmer can be used to program the ATTINY10. What about the JTAGICE MkII, which I have?
Saturday, 25 February 2012 - 10:50
How can I get my AT32UCL064 I/O pin to source 3.0V?
Hi, I am able to make a LED program run on my AT32UCL064 device. I measure the voltage coming out of the I/O pin, and it's about 1.5V (almost to 1.6V), which is what the spec...
Sunday, 12 February 2012 - 02:25