Sunday, February 27, 2011
Friday, January 28, 2011
Wednesday, January 12, 2011
Audio Amp Build
Finally getting around to building a chassis for my latest amp; its based on this design (http://www.tech-diy.com/LM4780_bridgedamp.htm) I had most of the parts kicking around; so I'm finally going to build a decent amp for my Mission V62 speakers. Nothing too crazy +-30VDC Rails; 33000uF cap bank; running the LM4780 in bridged mode to keep distortion low. Gives 120W RMS per channel while keeping distortion under 0.01% across the spectrum at full power(at least according to the guys at tech-diy.com)
I got the heatsinks and main chassis supports cut; I'm going to get some sheet metal cut and powdercoat it some fancy color.
I got the heatsinks and main chassis supports cut; I'm going to get some sheet metal cut and powdercoat it some fancy color.
Friday, January 7, 2011
Adjusting a Busybee Milling Table
Some details posted on the main site:
In case you came from somewhere else: http://thegreatgeekery.blogspot.com/
Thursday, January 6, 2011
The Wooden Pickle: Linear Bearings & Ball Screw
Something a friend of mine is working on...
Wednesday, January 5, 2011
Monday, December 20, 2010
CNC laser cutter
Incase you came in from somewhereelse; Check out the mainpage of the blog: http://thegreatgeekery.blogspot.com/
I have started a Cnc laser cutter with the hopes of building something good enough to cut SMD solder stencils.
Laser head:
I started with a 300mW IR laser salvaged from a CD burn; later I bought a 1W IR laser off ebay and a glass focussing lend. I turned a holder for the laser diode; and mounted it it in aluminum heatsink. I put the whole thing on a CDROM sled mounted on a ink jet printer carriage
Pics and video below.
For the driver I'm using stepper control modules from Pololu; I have laid out a carrier board for them and sent it off to be fabbed; should be in next week. Fully optically isolated; two relays for spindle control; 3 inputs for limit switches. Provides upto 2A of current per stepper coil (up to 35V)
I have started a Cnc laser cutter with the hopes of building something good enough to cut SMD solder stencils.
Laser head:
I started with a 300mW IR laser salvaged from a CD burn; later I bought a 1W IR laser off ebay and a glass focussing lend. I turned a holder for the laser diode; and mounted it it in aluminum heatsink. I put the whole thing on a CDROM sled mounted on a ink jet printer carriage
Pics and video below.
300mW prototype
1W IR Module cutting wood
For the driver I'm using stepper control modules from Pololu; I have laid out a carrier board for them and sent it off to be fabbed; should be in next week. Fully optically isolated; two relays for spindle control; 3 inputs for limit switches. Provides upto 2A of current per stepper coil (up to 35V)
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