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AVRISP mkII and ATmega8
- Double check 5V is present on the Vcc pin. - The reset pin should be pulled high (10k-100k) - The reset pin should be at 5V due to the pullup. - Double check that all the...
Thursday, 17 September 2009 - 00:45
AVRISP mkII and ATmega8
Are you trying to generate 5V power supply from a resistor voltage divider?
Wednesday, 16 September 2009 - 23:25
AVRISP mkII and ATmega8
The Reset generally has a weak pullup (10-100k). As for interference from other devices, it really depends on the other device.
Wednesday, 16 September 2009 - 20:20
ATmega8 USART Question.
The UART protocol used by both devices needs either some way of distinguishing messages (address scheme) or a form of chip select to allow one to be used at a time. If thats not...
Tuesday, 15 September 2009 - 19:55
PS/2 mouse for PIC16F877
All the cool kids are using 80186 these days.
Monday, 14 September 2009 - 23:23
C or ASM?
Understanding assembly is very very important. Using it in large complex applications where the exactness is not needed would be over-applying it.
Monday, 14 September 2009 - 23:21
Powering an ATMega8 and a LCD char. display?
Whiternoise wrote:It's tempting to get a solution like that, but the trouble is - for what i'd like mine to do - it'd be hard to sleep it (displaying a countdown timer during the...
Monday, 14 September 2009 - 16:32
ATMega32 Ladder Logic Software
There is still a ton of PLC code out there running in ST (Structured Text, think Pascal minus features) and IL (think assembly). The point of LL I personally never learned, but I...
Sunday, 13 September 2009 - 21:56
Atmega and UGN3503 Hall Effect sensor
Though the units aren't shown it is likely a 0.1uF 50volt rated cap.
Saturday, 12 September 2009 - 16:54
Atmega and UGN3503 Hall Effect sensor
To measure a full 5v signal you need to use AVCC as the reference. To figure out how much your magnet affects the output you simply need to experiment (unless you know the field...
Saturday, 12 September 2009 - 02:53
DebugWire and JTAG Debugging: AVR Dragon vs JTAGICE MkII
Iirc the Dragon also will not do PDI, which is on the Xmega. The Dragon is a great value for starting out with.
Saturday, 12 September 2009 - 02:44
Puttin 2 devices on mega8A usart.
That depends, are you talking about asynchronous serial or something like SPI? For async, there are two main problems: #1 the end-device's transmit pin being active driven,...
Saturday, 12 September 2009 - 00:53