Type in the full discussion title or a part of it.
Discussion Title Created date
caps kill spi
Obvious, I know, but worth pointing out.. I needed to smooth out input noise so I put a capacitor on the input pin to ground, forming an RC filter. Next time I went to (serially...
Tuesday, 25 June 2002 - 21:53
asmbly code: turning a byte around
Anybody got a nice way to reverse the order of bits in a register? So bits 0 and 7 change places, 1 and 6 change places, etc.. In the end, the byte is "facing the other way". I'm...
Friday, 12 April 2002 - 06:29
using Z, on '1200, ASM naming conventions
I'm talking about the avr 1200 here, in particular. I was going nuts.. I had the syntax right for using the indirect register ("Z") but I was not using the right lables on the...
Friday, 5 April 2002 - 17:51
interfacing to a toy's keypad
I would like to add speech to my AVR project, so I bought a calculator with built-in speech for a buck at the dollar store. I want the AVR to drive the calculator as a slave, "hit...
Wednesday, 15 August 2001 - 07:23
field service "flash zapper", using ISP?
I'd like to know if anyone has done a simple source/target "contents transfer programmer" that would accept an AVR part in a socket, and program another AVR (via ISP) to be a...
Thursday, 3 May 2001 - 19:51
bleedin' current thru protection diodes
If I use I/O lines configured as output and have LED cathodes connected to the pins and power the anodes from a different rail than Vcc to the chip current will get to the chip...
Saturday, 31 March 2001 - 23:43
coming unglued
I just wanted to pass this on, maybe save someone else similar trouble with respect to using HOT GLUE to hold components and loose wires to circuit boards. In short: don't. I...
Monday, 19 March 2001 - 07:38
correct value for pull down?
I'm using an at90s1200 output line to switch the gate of a N-channel enhancement mode mosfet (VN2222L) to drag a 12V line at the source down to the drain at ground. The current...
Monday, 19 March 2001 - 07:22