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SC-1mk2 and SC-1mk500 Mic Preamp Kits



SC-1mk2 Preamp Kit  SC-1mk500 Lunchbox Preamp Kit 
 Monday, December 21, 2009
TS-2 Mic Preamp Redesign
Monday, December 21, 2009 11:40:15 PM (Central Standard Time, UTC-06:00) (  |  |  )
I opened up a big box labeled "TS-2" that I've put away for sometime.
Surprise surprise!

I have lots of finished front panels, hundreds of blank VU meter boards, parts for the 48V DC-DC converter, inductors, chips, LEDs, etc... even found some brand new router bits.

I think I'm going to stick with the current front panel design. So we'll have power on/off switch, VU meter on/off switch, 48V on/off, polarity reverse switch, gain, and trim knobs and 5-LED VU meters. This design is as basic as I can make it (while still keeping the features working.)

I think I've got the solution now to reduce labor building a TS-2 preamp. The new board design will:

Reduced molex connectors from (7) to (2).
Eliminated 12 wire to XLR soldering tasks.
Eliminated 12 wire stripping, and 12 heatshrinking tasks.
Made easier soldering the VU meter PCBs to the main motherboard.
Eliminate 14 wire stripping, 14 molex connectors crimping tasks.

I think I can have a prototype PCB for the new board design by late January. So I need to finish the PCB design before the 31st.

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Wifi Radio
Monday, December 21, 2009 5:32:49 PM (Central Standard Time, UTC-06:00) ( )



Mightyohm documents in his blog the making of a low cost, open source wireless streaming internet radio receiver.  All construction details, including schematics, source code, and even the design process itself will be documented on this blog. http://mightyohm.com/blog/2008/10/building-a-wifi-radio-part-1-introduction/


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 Saturday, December 19, 2009
Doing Some CNC Milling Work After A Couple O
Sunday, December 20, 2009 3:43:41 AM (Central Standard Time, UTC-06:00) (  |  )
Doing some CNC milling work...



After a couple of hours, I have these babies...



For my TS-2 preamps


TS-2 Preamp by FiveFish Studios

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DC-DC Converter How-To
Saturday, December 19, 2009 8:10:27 PM (Central Standard Time, UTC-06:00) (  |  |  )


Maxim offers a great explanation of DC-DC converters.

DC-DC Converter Tutorial

Abstract: Switching power supplies offer higher efficiency than traditional linear power supplies. They can step-up, step-down, and invert. Some designs can isolate output voltage from the input. This article outlines the different types of switching regulators used in DC-DC conversion. It also reviews and compares the various control techniques for these converters.

http://www.maxim-ic.com/app-notes/index.mvp/id/2031

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Bliptronic 5000 LED Synthesizer
Saturday, December 19, 2009 2:37:48 PM (Central Standard Time, UTC-06:00) (  |  |  )
This is not DIY per se.... you can buy this musical device ready-made. 

But for under $50, you don't need to DIY this. Just buy it. It's loads of fun too.



What's under the hood?


http://www.thinkgeek.com/electronics/portable-audio-video/c4e1/

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