Post Created date
System to do number recognition
Would suggest you to use the camera in the mouse instead. The camera in the mouse is very low resolution, and atmega is definitely has the horse power to process this extremely...
Monday, 4 April 2011 - 23:54
atmega 8535 and eeprom programming
deepakgupta.rf wrote:clawson wrote:EEPROM sometimes corrupts if an AVR is allowed to run below the BOD threshold - do you have BOD enabled. (to be honest the amount of info in...
Friday, 18 March 2011 - 07:35
7805 So hot!
Murata OKI-78SR-5/1.5-W36-C, 5V/1.5A $3.93 (Mouser) Murata 7805SR-C 5V/0.5A $11.78 (Digikey) Wonder why a 1.5A rated switching voltage regulator is 3 times cheaper than a 0.5A...
Friday, 4 March 2011 - 00:00
7805 So hot!
If 1.5A cheaper than 100mA regulator, why not?
Thursday, 3 March 2011 - 23:54
7805 So hot!
Why OKI-78SR-5/1.5-W36-C is so cheap as compared to other switching regulator like Recom 5V/1A Switching Voltage Regulator USD12.45! One Recom can buy 4 OKI-78SR-5/1.5-W36-C!...
Thursday, 3 March 2011 - 16:36
7805 So hot!
matt6ft9 wrote:This is a switching drop in replacement for the 7805: The cost is $3.93 USD for one. It should run much cooler. Matt Looks like...
Thursday, 3 March 2011 - 15:48
7805 So hot!
meslomp wrote:in your original post you have a drawing that states : 12V DC power supply, and you are using a 12V AC power supply, so you violate your own design parameters. Also...
Thursday, 3 March 2011 - 15:30
7805 So hot!
I cant use 9V supply because I am using the 12V unregulated supply too to power other components. So, I need 12V and 3V only. I also cant redesign my PCB because it is already...
Wednesday, 2 March 2011 - 16:44
7805 So hot!
I also add a heatsink, it feel a hot but still ok to touch, I have tried to run the board for few hours continously without problem (touch wood)... My question is, with this heat...
Wednesday, 2 March 2011 - 06:58
7805 So hot!
Yup, the power supply is unregulated...Sometimes it go as high as 15V! Attaching the heat sink to 7805 ease the heat a bit, but still hot when touching (not burning though).
Wednesday, 2 March 2011 - 04:46
7805 So hot!
Energy consumption is not my concern at all... 200 ohm needs to dissipate .1x.1x200=2W, so I need to use a 5W resistor. Does that mean it is not important to add a diode between...
Wednesday, 2 March 2011 - 03:48
Any AVR Bootloader tutorial
zbaird wrote:For one of the Circuit Cellar contests I put together a little Butterfly bootloader that used a WIZnet Ethernet module. Have a look and see if it helps at all. Thanks...
Friday, 11 February 2011 - 06:06