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AVR and MUX issues
Hello, I have a problem with a circuit I am working on. I am currently using an ATmega32 and a multiplexer to read in values from 4 thermocouples. The thermocouple signals are...
Sunday, 5 June 2011 - 23:29
My circuit makes an audible tone...And i don't want it to...
So part of my project includes using a charge pump IC (TC7660) to provide a negative voltage to control the contrast of an LCD display I'm using. See attached circuit. The...
Wednesday, 23 March 2011 - 23:32
Thermistors questions
Hello, I am currently working on a project that uses a thermistor to read temperature values. I've set up a voltage divider as shown on the attached circuit. I'm reading the...
Sunday, 13 March 2011 - 18:32
Sparadic thermocouple readings, AVR ADC
Hello all, I am having a weird problem with a project I am working on. I am trying to use an op-amp circuit and the ADC on an ATMega8 to read temperatures from a thermocouple....
Saturday, 5 March 2011 - 00:13
AVR/PNP transistor issue
Hello all, I'm having a weird issue. I am using an I/O pin on the AVR to turn on/off the backlight of an LCD. I am not, however, switching the backlight directly from the AVR....
Tuesday, 1 March 2011 - 22:47
Pushbutton, LED, AVR
Quick electronicas question. As of now, I am using a pushbutton for user input. I have avtivated the internal pull-up resistor on an I/O pin on my AVR and read the state. When...
Wednesday, 29 December 2010 - 20:19
How to drive LCD backlight... Transistor question
Hello all, this is probably a simple question for the electronics buffs out there. Most of the 2x16 LCD displays I've seen out there have a LCD+ and an LCD- on them. This makes...
Wednesday, 22 December 2010 - 14:20
PCB interconnect solution needed...
Hello all, I bought a 2x16 LCD display for a project I'm working on, but when it arrived, I realized the I/O holes are very small. I don't have any tools to measure exactly the...
Tuesday, 7 December 2010 - 14:07
LCD & Pushbutton menu issues
Hello all, I'm trying to make a framework for an LCD + 3 button menu (prev, next, enter) but I'm encountering some odd results. For the code below, I am basically trying to do...
Friday, 3 December 2010 - 19:30
AVR & small brushed DC motor circuit considerations
Hello all, last week or so I got some great input from this community about a resetting issue with my AVR project and luckily found a quite simple solution: Bypass capacitors on...
Wednesday, 1 December 2010 - 15:38
AVR Resetting Issue.
Hello all, I am having a little trouble with a project I'm working on. Right now, the problem is (i'm sure there will be more to come) is that my mcu keeps resetting and I cannot...
Saturday, 27 November 2010 - 18:35
ATMEga32 & 2x16 LCD resetting issue...
Hello all, I am having a little trouble with a project I'm working on. Right now, the problem is (i'm sure there will be more to come) is that my mcu keeps resetting and I cannot...
Saturday, 27 November 2010 - 14:57