Type in the full discussion title or a part of it.
Discussion Title Created date
Piezo 'tweeter' power handling AVR question
Hi all,   I am planning on driving a piezo tweeter from an AVR.  The construction of the transducer is a piezo element glued to a paper cone.  That assembly is...
Wednesday, 30 December 2015 - 04:14
Pulse stretcher - 555 timer alternative?
Hi folks,   I am looking for a simple way to generate a pulse of 5 seconds from a momentary pushbutton.  I thought about the 555 timer, but I only have 3 volts.  I...
Tuesday, 20 October 2015 - 17:58
Burnt Ethernet circuit after years of operation
Can anyone throw in some thoughts on this?   Alarm panel with an Ethernet connection to a Cisco switch.  The alarm panel goes offline.  I see the board is charred...
Wednesday, 3 June 2015 - 01:53
D flip flop question - how to make a latch
Hello, I am trying to toggle a small motor on and off with a single push button. Button press = motor ON, next button press = motor OFF. So essentially I need a signal to change...
Tuesday, 22 July 2014 - 21:36
Common 'glue' you see on circuit boards
Can anyone tell me what that stuff is they use to Keep capacitors together on circuit boards? It is a flexible type of glue but you can tell it is not silicone. Does anyone have...
Saturday, 30 October 2010 - 20:38
ATMEGA128 external watchdog needed?
Hi, I am using an ATMEGA128 with the internal watchdog. Why would someone recommend me use an external watchdog chip? I ran my design across some engineers for a second set of...
Friday, 29 October 2010 - 01:39
LED question
Hi, I am looking to try something crazy. An LED flash bulb for a camera. I have 5 volts to work with and I am looking to make a PCB with an LED or several LED's. A few...
Monday, 23 August 2010 - 03:17
Question on Delays & Interrupts
Hi. I am using Codevision to write code for an ATMEGA8. I have a timer interrupt that occurs every 800uSec. This is working great and I have it to check the status of an input...
Friday, 12 September 2008 - 01:02
Tiny13 interrupt routine question
Hello. I am using the Tiny13 with the internal 4.8MHz oscillator. What I need is a 10mSec interrupt where I can check the state of an input pin. I downloaded AVR Calc and I...
Friday, 1 February 2008 - 22:33
Need help understanding memory size
I need help understanding size of memory. I have a Mega64 and I'd like to use its internal 2K of EEPROM to store a list of voltages read from the ADC, every 15 minutes (only in a...
Friday, 21 September 2007 - 14:04
Printing ADC value to terminal
I am working with a Mega64 and I have the UART working. I can send my function a hex values and it writes the character equivalent to the terminal just fine. void TransmitData...
Tuesday, 11 September 2007 - 15:20
AC mains optocoupler
I am trying to safely isolate AC mains through an optocoupler. The output is a square wave, yet want I want is a sine wave output, like the AC input. Do I need a special type of...
Wednesday, 5 September 2007 - 13:17

Pages