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STK500 JTAG Adapter schematic
Hey! Does anyone have a schematic or board layout for the STK500 JTAG Adapter? It comes with JTAG ICE, but I want to use my Dragons ability to program and debug via JTAG also......
Thursday, 20 March 2008 - 19:57
Tiny45 HVSP
Hey my tiny doesn't want to talk to my STK500 in HVSP mode. Tiny45 is on an external board. all lines are connected directly to the AVR pins and external stuff (that is connected...
Wednesday, 19 December 2007 - 15:34
easyest way to monitor battery voltage.
Hey I read from this forum, that the easiest way is to set the Vref to be the Vcc and read the 1.1V bandgap voltage and from there calculate the Vcc voltage. I'm trying to use...
Sunday, 16 December 2007 - 16:58
Tiny45 OCR1B and #OCR1B
Hey. I'm trying to get both OCR1B channels working, but somehow the inverted one doesn't want to start. I have read the datasheet from front to back and back to front but can't...
Sunday, 16 December 2007 - 14:36
negative voltage for LCD contrast using passive components
Hey! I have a problem... I did a whole design and forgot to check, if my LCD requires negative or positive voltage for contrast. and what do you know, it needs negative ;)using...
Monday, 19 November 2007 - 21:14
SPI on Mega88 silent
Greetings. I have a setup of ATMEGA88 on a PCB with all kinds of stuff connected to it ;) I do programming via SPI. There is currently nothing else connected to the SPI lines (so...
Saturday, 17 November 2007 - 11:59
bidirectional optical isolation
Hi there! AS it's getting late (1:30 in the night) I was wondering, if there were any bidirectional optical isolators available out there? I would like to make a hide for my...
Friday, 2 November 2007 - 00:19
Dragon doesn't want to get into Debug mode
Hello My new dragon doesn't want to go into debug mode. Drake connected to ATMEGA88 through ISP. ATMEGA is clocked by 32768Hz crystal successfully. But as my perfectly working...
Thursday, 1 November 2007 - 19:20
Powering 108 White LED's
Hey. What is the easiest way to power up 108 5mm 20mA White LED's. Power comes from 230VAC mains. Has to last at least 10h straight. The less components the better ;) LED's are...
Thursday, 4 October 2007 - 19:46
HD44780 LCD display running 3V3?
Hey For my project I planned to use a character LCD, but my whole system runs on 3V3... Does anyone have experience with this? can the LCD work with 3V3? (both Vcc and control...
Monday, 24 September 2007 - 15:55
quick 3V3 ISP programmer
Hey. I do have a SKT200, but as I know it only works on 5V boards :( IS there a similar board I could use to program a 3V3 board. And no I can't preprogram the chip on another...
Saturday, 22 September 2007 - 11:37
Dragon: anotherone bites the dust?
Hey. I fsome of you have been following the "Constant Current Source" thread you might now, that my Drake has probably broken :( Symptoms: No connection to AVR's. Problem: Reset...
Friday, 31 August 2007 - 16:03

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