Post Created date
Bit Angle Modulation (BAM) / Pulse Coded Modulation
A change between 1 and 2 percent duty is a 100% increase in energy. Log changes might well help the problem. That means mapping a shorter scale to values of total duty cycle....
Thursday, 8 January 2009 - 18:47
Bit Angle Modulation (BAM) / Pulse Coded Modulation
Thanks, condemned, for the complement. I can think of a method using a single N-Ch MOSFET to modulate the column sink drive for all columns simultaneously for the 8x8 array would...
Wednesday, 7 January 2009 - 21:49
Bit Angle Modulation (BAM) / Pulse Coded Modulation
I used "cooked" in describing the discussion in the PDF because the approach for driving multiple PWM outputs doesn't seem optimal. It seems to favor the BAM unnecessarily. (...
Wednesday, 7 January 2009 - 20:02
Bit Angle Modulation (BAM) / Pulse Coded Modulation
The comparision of BAM to PWM in the former's web site is cooked. And as Steve pointed out, the AVRs are capable of putting out a PWM signal without any ongoing firmware...
Wednesday, 7 January 2009 - 18:31
jtag question about chaining multiple devices
On the Dragon the voltage is used to drive the target device sides of the I/O level shifters on the programmer interface. I think the same thing is done on the other ISP boxes....
Wednesday, 7 January 2009 - 17:59
AVR with a sensor ???
Better apples to apples price comparison than the link to Sparkfun that I had followed. A penny is nothing.
Tuesday, 6 January 2009 - 22:28
AVR with a sensor ???
This link has a sensor with a digital output and is much cheaper, though at first glance it looks like the SparkFun item. You should be able to scavenge to make your own prototype...
Tuesday, 6 January 2009 - 19:54
jtag question about chaining multiple devices
That last item bothers me no end. It seems to be saying that the other parts of the chain need a different supply when you use a JTAGICE-II. I've chained programmed ATMega32s four...
Tuesday, 6 January 2009 - 18:40
Designing a board computer for a small satellite
Not if he promises to keep it. Google microsat. Interesting subject.
Thursday, 18 December 2008 - 22:01
how to protect data stored in atmega against copies
Etching away the expoy is done rather routinely in order to gain insight on what has damaged or killed a chip. The process doesn't disturb the delicate bond wires and is...
Thursday, 18 December 2008 - 21:47
How to replace device on STK500
If one is not familiar with the screwdriver technique, there is the hazard of getting fingers punctured by leads (I have the scars to prove it) as well as badly bent leads. This...
Wednesday, 29 October 2008 - 16:50
How to replace device on STK500
John, You are spoiling some of the fun the OP might have learning to check the data sheets before proceeding to power up. Letting the smoke out is a valuable learning tool. ;-)...
Tuesday, 28 October 2008 - 18:46