Search found 41 matches

by wholder
Tue Feb 13, 2018 12:28 pm
Forum: AVR Microcontrollers
Topic: AVR/Arduino Hardware Debugger on the Cheap
Replies: 2
Views: 724

Re: AVR/Arduino Hardware Debugger on the Cheap

I’ve posted a new, part 3 article on my debugger project, along with new code and an overview video.  The new code  is now able debug an Arduino UNO running at 16 MHz and also includes some bug fixes and enhancements.   https://sites.google.com/site/wayneholder/debugwire3   https://youtu.be/F1202b0l...
by wholder
Sun Feb 04, 2018 2:05 pm
Forum: AVR Microcontrollers
Topic: AVR/Arduino Hardware Debugger on the Cheap
Replies: 2
Views: 724

Re: AVR/Arduino Hardware Debugger on the Cheap

Just a quick update, I've updated the code for both DebugWireDebugger and OnePinSerial to improve the automatic baud rate detection and the reliability of debugWire communication using OnePinSerial. The new code has successfully worked with an ATTiny85 running at 8 MHz. See: https://sites.google.com...
by wholder
Wed Jan 31, 2018 7:20 pm
Forum: AVR Microcontrollers
Topic: AVR/Arduino Hardware Debugger on the Cheap
Replies: 2
Views: 724

AVR/Arduino Hardware Debugger on the Cheap

I’ve developed an Arduino sketch that runs on one Arduino and allows it to control and debug another Arduino, or an AVR-Series micro-controller such as an ATTiny85.  With some limitations, you can use the controlling Arduino to disassemble code, single step code, inspect and modify the current value...
by wholder
Thu Aug 03, 2017 4:30 pm
Forum: Arduino
Topic: New Arduino Key Lib can Read 6 Buttons using only 3 I/O pins
Replies: 2
Views: 707

New Arduino Key Lib can Read 6 Buttons using only 3 I/O pins

I've written a new key input library that supports a special type of multiplexing that can scan 6 buttons using only 3 I/O pins, 10 buttons using 4 I/O pins, 15 buttons using 5 I/O pins, and so on. For more details, see my web page and video at: Introducing KeyPlexLib (or, 'Wayneplexing' on Arduino ...
by wholder
Sun Jun 11, 2017 2:19 pm
Forum: Projects
Topic: Pushbutton and Time-based Power On/Off for Arduino
Replies: 0
Views: 480

Pushbutton and Time-based Power On/Off for Arduino

I’ve designed a small circuit you can build which lets you power an Arduino On, or Off by pushing a button, or responding to an external signal, such as from a sensor. You can also use this circuit with a Real Time Clock (RTC) module to power on an Arduino at a particular time, or date and time and ...
by wholder
Fri Mar 22, 2013 3:26 pm
Forum: Sparkfun Promotions and Competitions
Topic: AVC 2013 Course Discrepency
Replies: 5
Views: 2994

Re: AVC 2013 Course Discrepency

I did read through the rules carefully, but it doesn't seem to address the two specific cases I asked about, at least with respect to ground vehicles. Manual intervention seems to be allowed in the Aerial category, but it's not clear if I can carry, or use a transmitter to stop a ground vehicle if i...
by wholder
Fri Mar 22, 2013 1:28 pm
Forum: Sparkfun Promotions and Competitions
Topic: AVC 2013 Course Discrepency
Replies: 5
Views: 2994

Re: AVC 2013 Course Discrepency

Thanks for clearing up the issue with the ramp dimensions and for the guidance on the stanchion and hoop pipe diameters. That helps a lot. On a different subject, the rules say "The vehicle must be fully autonomous and self-contained. No transmitters or communication beacons (other than GPS) of any ...
by wholder
Wed Mar 20, 2013 4:51 pm
Forum: Sparkfun Promotions and Competitions
Topic: AVC 2013 Course Discrepency
Replies: 5
Views: 2994

AVC 2013 Course Discrepency

The walkthrough video (at about the 3:27 mark) indicates the width of the ramp as being 4.5' (feet). However, the diagram on the page at https://avc.sparkfun.com/2013 shows this same measurement as 45" (inches), which is substantully narrower at 3 3/4' (feet). Can you confirm which measurement is co...
by wholder
Fri Feb 08, 2013 3:32 pm
Forum: Sparkfun Promotions and Competitions
Topic: AVC 2013?
Replies: 6
Views: 3713

Re: AVC 2013?

It's now February and still no update on AVC? June 15 is not that far away and, for those of us coming from out of state, it would be really helpful to know a few details about the new venue and it's location so we can make travel and lodging plans. Not meaning to complain, but I do hope we can lear...
by wholder
Sun Dec 23, 2012 6:47 pm
Forum: Sparkfun Promotions and Competitions
Topic: AVC 2013?
Replies: 6
Views: 3713

AVC 2013?

Any news, or updates? Even a few crumbs of information would be nice...

Wayne
by wholder
Mon Apr 02, 2012 4:49 pm
Forum: Arduino
Topic: HELP: gps not talking?
Replies: 20
Views: 4171

Re: HELP: gps not talking?

I believe the problem is that the buffer size used to hold received characters in SoftwareSerial was reduced in Arduino 1.0. For some background on this, see my post at:

https://sites.google.com/site/waynehold ... g-with-gps

Wayne
by wholder
Wed Jan 11, 2012 10:07 am
Forum: SparkFun Site Questions/Comments
Topic: 2012 Free Day is no fun...
Replies: 9
Views: 2468

2012 Free Day is no fun...

Well, after spending an hour typing meaningless text, I decided to stop. There's still plenty of money left, but it's just not worth my time to sit here on a work day doing a totally boring task, over and over and over and over just to get $100. To all the rest of you, I wish you the best. But, hone...
by wholder
Sat Dec 31, 2011 2:01 am
Forum: New Product Ideas
Topic: Level Translation Protoboard Shield
Replies: 0
Views: 445

Level Translation Protoboard Shield

I'd like an Arduino shield that looked like: http://www.sparkfun.com/products/7914 but provided the following features: 1. A beefier 3.3 Volt regulator and pins to tap this voltage 2. Switchable, onboard level convertors for selected pins, such as: a. Analog input pin 4 (SDA) and analog input pin 5 ...
by wholder
Fri Dec 23, 2011 2:50 pm
Forum: SparkFun Product Questions
Topic: AVC Newbie requests advice
Replies: 2
Views: 319

AVC Newbie requests advice

After several years of saying I'm going to try but then chickening out, I finally signed up for the 2012 AVC and plan to build a ground vehicle. So, now that I've probably bitten off more than I can chew, I'm looking for advice and wondering if anyone has, or is willing to share some with a new guy ...
by wholder
Mon Sep 12, 2011 10:54 am
Forum: SparkFun Product Questions
Topic: ATTiny10 Assembly IDE and Device Programmer
Replies: 1
Views: 388

ATTiny10 Assembly IDE and Device Programmer

I've developed a simple, Java-based IDE for writing assembly code for the ATTiny10 family. I've also developed a simple HV programming circuit that works with the IDE to create a complete solution for writing code and then programming an ATTiny10 device. Since my design implements a high voltage pro...