AGTCooke, if you are considering doing more surface mount soldering you may want to take a look at using solder paste and a hotplate. This page has quite a good guide to hotplate soldering. Its also possible to use a skillet, Sparkfun have a pretty good tutorial on how to do it as well.

Well, I reached my limit today. Nearly 23 months and no amp. Xin's own "Currently Shipping" post is 8 months out of date, and $300 out of pocket. I emailed Xin and requested that my order be canceled and to be refunded. I fully expected to need to wait a week or more before I heard...

Quote: Originally Posted by DoYouRight wow great way to introduce your own board! would you happen to have a spare? I only had one board made as I knew I would make a mistake somewhere, and boy did I! If you notice in the photo the board has V3.0 on it, the schematic I...

For those that were interested in a little more information on my Beta build I've attached the files. Due to the forum attachment size limit I've had to split them up. What IS included: Schematics for the Beta22 control board and Sigma22 control board. Source code for the picaxe...

I'll likely get some time to put the files together over the weekend, so hopefully I'll have something for you guys after that. I'll try to update things as well to reflect the additional changes I made during the build. I'll try to include stuff like part numbers for the case, switches, knob...

I started getting things together and ordering parts in February this year. Most of the time was waiting for various parts to arrive. The cases are Par Metal 12x12x4 Series 20 in Black. The front panels are done by Front Panel Express. The button lights are set up so that Balanced is Blue and...

Thanks guys Just don't look under the control board, its a mess with the modifications I had to make.

Well its finally done. The front panels arrived yesterday from FPE so I was able to fit them last night. I went with dual colour Bulgin momentary switches for the mode buttons. Blue Green The control of the amp is done using a Picaxe18+driver chip to handle the LEDs as well as the...

SilverShadow, I recommend making your desktop background a photo looking out your window, taken from where you sit. Make it look like your monitor is see through

Agreed, the Arduino is probably the best way to go. In fact I have already done something like this myself. The voltage from the Sigma22 goes into a voltage divider -> opamp so both rails can be measured. (the arduino can only measure between 0 and +5V)

Primarily the picaxe handles the power switching with some added bells and whistles. In its simplest form it allows you to use a momentary push button to toggle the power on and off. But because of the additional inputs and logic also allows you to do some more interesting stuff. If you...

As requested, a closeup of the FETS mounted on the heatsink As you can see I cut away a section of the heatsink. This helps the fins of the heatsink line up with the vents in the bottom of the case. And also a closeup of the picaxe controller The four six pin chips near the front are...

Quote: Originally Posted by johnwmclean Is a headphone/speaker design? Keep em coming Never heard of this, like to hear more about the pros and cons regarding this feature - never seen any on other builds. Primarily headphone, but I like to leave my options open The is...

Yup, thats the glass jar kit, makes things so much easier (Thanks Jeff!) I have cut notches into the heatsink so I could have them mounted closer together. The vents in the bottom of the case now line up with the heatsink fins. I figure the way Perth summers get I need it to handle as much...

Hmm... lets try that again...