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Special Shutdown Procedure when Sinking current
Using a mega48 with two voltage sources. Problem when the mega48 power goes down second voltage supply still on led's Portb 0..7 PortC 1..5 PortD 0..2 Toggling data direction...
Thursday, 28 December 2006 - 16:10
Curent limit circuit options
I am building a simulated rotating light using 16 white LED's in a circle. Here is a streaming flash clip if three LED's on the test bench. www.metron9.com/led.html I will be...
Wednesday, 20 December 2006 - 17:24
What is the most power I can generate from a 1.2V battery
I am using a tiny13, fastPWM 9,6mhz 50% duty cycle that is the highest current I can generate through a yellow led. 100uh inductor 2n7000 mosfet BAT85 shottky diode .22uf...
Sunday, 17 December 2006 - 20:55
Tiny13 Room Light Solar Project
I am having some fun with the new inductors I got and a little solar panel. I have built a circuit (attached) that generates 50V open circuit from a 1.8V solar panel output. I am...
Tuesday, 12 December 2006 - 05:05
Tiny13 at 128khz and stk500 isp programming
I read the warning not to divide the clock by more than 32 when using 128khz clock but I think thay mean less than 32 because 128khz / 32 = 4000 and 1/4 of that is 1000. The...
Friday, 1 December 2006 - 05:25
Tiny13V reset TCNT0 before SLEEP too 0
I have a battery operated project that controls a tiny stepper motor that can be stepped directly from the chip ports. I am using idle mode sleep and timer0 prescaled at 1024 to...
Wednesday, 29 November 2006 - 00:55
ET-AVR-STAMP mega128 / JTAG ICEMKII
I bought this little board here for 20 bucks I have an ATMEL AVR JTAG ICEMKII http://www.futurlec.com/ET-AVR_S... First , has anyone used these boards? with the JTAG interface?...
Friday, 27 October 2006 - 02:20
20MHz Oscillator noise
I am using a FOX F1100e 0614 20 MHz Oscillator , the stk500 and a mega48. Working on the USART, With my scope probe connected to only ground I get a huge 20MHz signal. Scope is a...
Saturday, 7 October 2006 - 13:49
Mega48 PortB6 XTAL vs PortE XT1 external clock OSC
The external clock is running fine but I don't understand something. I have a Mega48 in the Stk500 running a 20MHZ external OSC. The clock is connected to PortE XT1. Typically I...
Tuesday, 3 October 2006 - 08:18
FM24C64 I2C Data is not what was written
I am trying to get this FRAM memory to work but I do not have any luck getting an ACK. Attached scope output Link to datasheet: RAMTRON chips http://www.datasheetcatalog.com/...
Monday, 11 September 2006 - 01:43
Prescaler & CLKO
I am playing around with clock oscillator modules this one is 1MHZ used as input to PB3 CLKI on a tiny45. In the program I devide by 32, the fuse is set to output clock on PB4 The...
Friday, 25 August 2006 - 00:52
Why is this code in simulator not working
I have been learning how to program the Parallax SX28 chip and it seems after 2 weeks I have lost most of my skill at programming Atmel chips. Anyway I am working on a design...
Tuesday, 22 August 2006 - 04:17

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