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Discussion Title Created date
DAC range limited?
Freaks, I did a brief search but could not find a thread that covered this issue. I am using the DAC of a 128a1u. I need an output from 0-2.5VDC. Even with no load, I cannot get...
Thursday, 31 October 2013 - 23:36
Colpitts and temperature change.
Freaks, I am using the attached circuit to detect the presence of an object inside the coil. The output is connected to the ICP on an Attiny84. The firmware measures the period of...
Friday, 23 August 2013 - 16:56
Frequency measurement on Attiny84.
Freaks, I am using T1 and the ICP mode on an Attiny84 to measure the period of a square wave. The maximum frequency to be measured is around 45Khz. The period measured is always...
Thursday, 22 August 2013 - 19:17
How do I set clk fuses on ATTiny84 using JTAGICE mkII?
Freaks, I am using a JTAGICE mkII to program and debug an ATTiny84. All works well except I cannot figure out how to change the clock fuses to select the external crystal. I...
Thursday, 15 August 2013 - 20:30
AC ground and the "brick" power supply
Freaks, I am working on a project that uses a brick power supply. When completed the project will end up in an industrial environment. Some of the power supply units available...
Monday, 18 June 2012 - 11:46
CO-AX vs "ground plane"
Freaks, I am looking for some assistance with a small technical decision I have to make. Any feedback would be greatly appreciated. I am using a sensor to detect a charge on...
Wednesday, 8 February 2012 - 15:23
Need optoisolator in a small pkg
Freaks, I'm looking for an optoisolator with darlington o/p in as small a pkg as possible. Can anyone suggest a device? Thanks in advance. A.
Sunday, 20 November 2011 - 23:21
Is it a good idea to share ( a clk )?
Freaks, I have a board design that uses two mega 128s and one xmega. Currently they all have their own xtals. Comm between the micros is by serial port. ( No problems to date )...
Wednesday, 20 July 2011 - 15:06
malloc() and the unused pointer.
Freaks, I need a little direction with reference to the use of malloc(). If I have an array of (void) pointers that I will be using to reference strings that will be assigned...
Monday, 11 July 2011 - 05:43
Libs for database
Freaks, I need to implement a database on a system that currently uses fixed memory locations for data storage. The current setup is too inflexible for some upgrades I am planing...
Tuesday, 28 June 2011 - 19:00
Sensor ideas needed.
Hi Freaks, I am trying to figure out a way to detect the presence of a person within a circle with a 4 foot diameter. The sensor needs to be battery operated and should go a month...
Saturday, 7 May 2011 - 20:06
A question of Joules.
Freaks, Although I understand the concepts, I am little short on details. Could someone a little more versed in HV apps try and set me straight. I have an application that...
Wednesday, 12 January 2011 - 20:23