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Why did my 7805 regulator blow up?
Using a GBU 4A Bridge rectifier 24V AC input 24V DC output to 7805A 5V regulator No capacitor across the 24V output (Note Diode inline with Positive to 7805A Input) 3300 uf...
Saturday, 18 October 2008 - 23:18
Tiny13 with big capacitor startup after powerdown
I am getting close to the end of experimenting with my luxeonIII/Fansink + Boost and Buck converters project using a tiny13 and PWM to run the Buck converter. Since i will be...
Wednesday, 1 October 2008 - 07:38
Buck regulator design
I am putsin with buck regulators now making my own (attached circuit) I am using a p-fet instead of the switch shown in the schematic. The gate of the pfet is connected to a 220...
Tuesday, 23 September 2008 - 15:55
Can i use a Zener when driving a fet?
This fet http://www.fairchildsemi.com/ds/... Shows the Vgs max of 3V the plot shows using a 3V zener on the signal line using a 5V output from avr pin. Is this ok to do or should...
Friday, 19 September 2008 - 07:35
Communicating on power lines
I am working on a project to communicate with remote LED lights using just the positive and negative DC power feeding the lights. Attached is a schematic of my circuit designed...
Sunday, 14 September 2008 - 00:37
New to coding in C having debug execution problems
I decided I should learn how to code in C since I want to learn the avr32's. Since there is more help and tuts on the 8bit stuff i figured i would buy smilies book and butterfly...
Wednesday, 20 August 2008 - 07:38
Another 8BIT programmer trying to get up to speed with 32bit
I have waited a year before delving into the 32 bit world. I took a few days and tried for 2 days to get a handle on what to start with and then thought perhaps I will wait...
Monday, 18 August 2008 - 01:26
Nasty negative voltages on PWM pin
Long time no post I have been on a break. Back at it again with a new design for my simulated rotating light. This time it is going to rotate though. I found some 4 RPM motors...
Wednesday, 16 April 2008 - 08:28
External capacitor timer
I am working on a project that will use a button battery. I have selected the Tiny13V using 128k internal clock with a clock prescaler of 256. If I use idle mode and the timer...
Monday, 14 January 2008 - 03:08
I am having a problem with phase corrrect PWM mode 5 Tiny45
The scope and debugger show The OC0A pin set high the first compare match TCNT0=OCR0B and then clears it at top=OCR0A and never sets it again although at OCR0A it reverses and...
Wednesday, 31 October 2007 - 05:59
JTAG Speed and number of breakpoints
I am now using ont of the Futurlec et-AVR mega128 boards and their JTAG programmer, it was 10 x less money than the AVR jtagIce markII I have in my programmers drawer that I never...
Friday, 19 October 2007 - 04:15
Question on Sram datalines
I am using a W24129A static ram, the datasheet does not show how to connect the microcontroller to the sram chip and i have just directly connected the pins. Right now before I...
Tuesday, 16 October 2007 - 09:35

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