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HC-SR04 code with timer based trigger.
I am trying to implement a measuring device as a parking aid using the HC-SR04. I have found a lot of good examples. I have used the ideas from different versions and put them...
Sun. Sep 17, 2017 - 04:26 PM
Olimex MKII firmware upgrade
I have searched and tried to find a solution to my problem but I just can't get anything to work. I got a new computer (Windows 10) and am trying to get the programmer and...
Tue. Sep 12, 2017 - 04:09 AM
Solved: Olimex MKII firmware upgrade
I have searched and tried to find a solution to my problem but I just can't get anything to work. I got a new computer and am trying to get the programmer and software to work. I...
Sun. Sep 10, 2017 - 05:41 PM
PWM for ATTiny13A
I am trying to set up a variable duty PWM on an ATTiny13A. I can get the correct wave, but I only get a 50% duty wave. It doesn't matter what value I use for OCR0B. I tried 7,...
Mon. Feb 8, 2016 - 04:15 AM
PIN and Charlieplex issue
I am trying to debug some Charlieplex code and I am not sure what is going on. Let me see if I understand this: So this is how I intrepret these lines: DDRB = ( 1<<0 | 1...
Wed. Feb 25, 2015 - 08:36 PM
4x3 multiplexed keypad issue.
I have spent several days researching and modifying code to be able to read the keypresses on a 4x3 matrix keypad. I see that it has been done a gazillion times and I guess there...
Fri. Jan 30, 2015 - 06:50 PM
AVR314 attempt
I want to make a fake phone that the user can press the buttons and the sound of the corresponding buttons will be heard in the earpiece. If they enter the correct phone number...
Wed. Jan 28, 2015 - 04:07 AM
TIP120 problem
I am trying to power a solenoid from a signal generated by a microcontroller. It seems pretty straight forward. I am using a TIP120. I have a pin on the microcontroller to create...
Tue. Jan 20, 2015 - 05:39 PM
LED Charlieplex problem
I have 12 LEDs that are Charlieplexed that I want to control through some buttons. When a button is pressed. I want to toggle the state of the corresponding LED. I will need...
Sat. Jan 17, 2015 - 03:35 AM
Debouncing more than 8 buttons
I think I have searched to no avail to find a routine to debounce more than 8 buttons so I tried to modify Peter Dannegger's code but I couldn't get it to work. So I tried to...
Sun. Jan 11, 2015 - 07:03 AM
Combining Pins as inputs
I am experimenting with a method to create a method to use fewer pins that there are switches, similar to Charlie Plexing. So I have 12 switches. 4 rows by 3 columns. Think kind...
Fri. Jan 9, 2015 - 05:43 AM
Volatile Variable being optimized away?
I have some code that is not working and it looks like the problem is that the compiler is optimizing away my variable. I added the volatile declaration and it is still being...
Sat. Nov 29, 2014 - 06:21 AM

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