Microcomputer Project Updates
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Accelerometer Testing
27 May 2010 1:59 PM | 2 Comments -
Final Project
12 May 2010 9:48 AM | No Comments -
Project Proposal
07 April 2010 12:27 PM | No Comments -
PWM / Motor Control Update
31 March 2010 9:05 AM | No Comments -
Preliminary Investigation
30 March 2010 12:25 PM | No Comments
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Featured Archive
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Switch Bounce
Most people who have dabbled in embedded design know that all mechanical switches have some amount of “bounce” where they are not making solid contact for a short time after being pressed or released. If you manage to read the button fast enough that you make more than one reading while the button is still [...] -
Introducing Scopezilla: HP 54720A
I decided that I needed a scope for my projects a few weeks ago. After searching for a little while I decided on a used HP 54720A. This thing is a monster! It is about the size of tall kitchen trash-can and weighs a whopping 75lbs. For all that massiveness you get 1.1GHz bandwidth, 4GS/s (thats four [...] -
Equate File for HC11 Registers
I couldn’t find an equate file of the registers for the 68HC11 anywhere online, so I just typed it all in myself. To spare others from the same tedium I am posting it here in hopes that anyone who needs it can find it easily. The file includes both the extended addresses of each of [...] -
Lab 2 – Quantitative Metallography
Quantitative metallography is the study of metallic crystal structures from the perspective of numeric quantities. Examples of quantitative metallographic measurements include number of grains per unit area and fraction of specific phase per unit volume. These two quantities are what we will investigate in this lab. -
Lab 6 – Creep
Creep is a condition where a material will undergo progressive plastic deformation under constant load or stress. In most metals, this behavior is only present at elevated temperatures, but a few soft metals like tin and lead will experience creep at room temperatures. This experiment will explore the creep behavior of lead. -
Distortion Testing
I have been doing a few distortion measurements of the drivers in my current project. I have become concerned about the distortion products of the mic itself. The following is a test of the distortion of my HDS Nomex driver driven at 2.83V with mic distances of 4″, 8″ & 16″. The distortion products should [...] -
Peerless/Usher – Post #5
Another Crossover This one has a little more informed crossover point. I ended up with 1800Hz LR4. Hopefully this will be low enough to attenuate the peak in 3rd harmonic on the woofer (centered @ 1600) as well as get rid of most of the weird peak in high order harmonics in the tweeter around 2k. [...]