Since I finally realised that even I could probably benefit from incorporating a little bit of software in my otherwise purely hardware-based projects, I have been toying with the idea of building a more generic controller that could be used for many different audio projects. Obviously this is...

No, you have been hibernating and all of a sudden it's April 1st EAGLE flies across the Channel (and beyond) - ELEKTOR.com – Platform for electronics and microcontrollers Wonder what this will mean for DIY'ers? /U.

Simple question: Can I use a 50k linear pot for either the volume or the bass boost on an M3? Reason: I have a semi-finished M3 and two Alps Black Beauties lying around (both 50k but one is linear and the other is log taper) /U.

What do you think, are these really NOS? BUF03FJ Buffer IC on eBay, also ICs Processors, Electronic Components, Electrical Test Equipment, Business Industrial (end time 23-May-09 14:44:18 BST) /U.

Let's consider this, slightly flawed, rectifier circuit with the connections for AC and DC mixed up. Assuming this was a completed, soldered PCB, would it be possible to get it to work correctly but simply flipping some of the diodes around? And if yes, which diodes would have to be flipped so...

Anyone going? /U.

If anyone from the UK or Europe are planning to order from Canford sometime soon, I'd really appreciate some help getting a single (small & cheap) item which I need. Send me a PM if you can help /U.

Found a version of this track on one of those places where one isn't supposed to look for new music It is listed as "Good Enough" (Acoustic) but no further information is given. The track is 3mins 40 secs long and it sounds like it is just Sarah on her piano, not live or anything. Does anyone...

I need to remove a pair of small transformers from a PCB. Any tips/ideas on how to get the d**n things off without destroying either the transformer or the PCB (or both ). I've removed as much solder as I could using desoldering braid but it's not enough and it's simply impossible to heat all...

Ok, I know this isn't new, but I just bought it a couple of days ago and I was actually pleasantly surprised. I hadn't expected much, but this is a very good concert. The set here is a 90 min. concert as well as an audio cd with 12 of the 17 tracks from the concert. The songs are varied and...

..or am I wrong? From looking at the datasheet for the Kobiconn 2.5mm jack over at mouser.com (p/n 171-3306), it would seem that it fits the socket on the HD590, HD495 and similar models without any modifications. There was a gold-plated version as well (used to be p/n 171-3307), but it appears...

http://www.spikedhumor.com/articles/4044/I_O_Brush.html (probably the most useless as well though) /U.

Lately I've come to the harsh realisation that there is just too long between I actually finish anything (complete with case and everything). However, as I have plenty of projects wating to be completed, so I figured I'd show a little of what's lurking in the corners of my desk Millet...

Has anybody tried to build this ? Last week I found the schematic for PPL's Lisa-II amp and jamont's PCB-layout. As the layout files weren't immediately available I decided to "clone" jamont's layout on my own. I'll probably be ordering a board or two in a month or so, but I thought I'd post...

Does anyone know how to disassemble a pair of HD495's? My brother managed to break his pair and it seems the problem is in the connector (the cable is fine). From what I can see, the earcup can be disassebled, but I am a little unsure of who much force it will tolerate without breaking. Are...

..May the next year be one of lots of good whisky and good music for you /U.

I'm trying to lay out PCB's for a few small tube circuits using 6922/6DJ8 tubes, but how in the #&€%! do I connect the heaters to the (proper) tubes? I sorta figured out that I have to connect each heater separately but I can't get it to link the heater and the tube. Does anybody know how to do...

Well, there are actually two reasons for this design: Firstly, since I discovered sources for cheap high-bright LED's everything I build has to look like it's designed by a mad PC-casemodder on LSD and secondly, because I was recently given access to the prototype workshop at my job, I just had...

I just saw here that diyhifisupply.com is apparently selling the DACT CT2 for $70 on clearance which looks like a good deal to me I am in no way affiliated with this company (I had actually never heard of them before today) and I take no responsibility whatsoever etc. /U.

Can anyone convert these libraries to Eagle 4.11 format (or later) for me? Unfortunately the OS X version of Eagle doesn't recognize files from older versions As far as I am aware, simply opening the libraries and resaving them from within Eagle 4.11 will do. /U. Link to file (76 kB zip)

I finally managed to case my PPA after it has spend a few months in a "voodoochile-case" (clamped to a piece of wood ) Pics below The thread title of course refers to that I have a v1.1 board nearly completed as well. With any luck it'll be cased up in three months or so Do...

A few weeks ago I had the chance to play with one of these stepped drillbits in the prototype shop at work. I really liked it so I went out and bought a set of three for myself. They were not cheap but I hoped they could make chassis-building a little easier. I have tons of completed amps and...

This might be a stupid question but I can't for the life of me find anything on any of my AD86x0-opamps that indicate pin 1 and the datasheet isn't much help as far as I can see. Which rule of thumb/part of the datasheet did I overlook? /U.

I'm considering Marcello Pellerano's Zen as my next "official" project, but can anybody tell me if I can use 1/4W resistors for the amp?. I plan to use the same voltages and bias-points stated in the article. I have also had trouble finding the ZTX450 at any of my usual parts sources. Can...

I just came home from the second of two concerts in Copenhagen. The show lasted around 2 hours (just over 2 hours in fact) and it was very well made and it is great fun to watch. If Kraftwerk is coming to a place near you, go see them because this was a great show!. (and bring earplugs...