In my application (building a GainClone) I'm going to be turning the amp on and off by switching the +/-Vdc supplies with two relays - one for +Vcc, one for -Vcc, ground will remain connected. The relays will be placed after the transformer/psu and before the amp modules they power. I would...

I'm using the chipamp.com GainClone and finished the PSU a while ago. I tested it about a month ago with no load and all was well - the PSU powered up, LED turned on, and voltages were right on the money. Today I got some time to continue working so I mounted the PSU and Trafo to a piece of...

I remember reading somewhere (perhaps on this board) that using a relay to cut power on the secondary side of a transformer was bad practice. I'm wondering if (assuming that's true), it's simply not the best solution or if it actually is a problem. The situation is that I have a custom-wound...

I've been doing some work with my little rotary encoder and I think I'm ready to order a couple prototypes. The main idea is the encoder input (with optional push-switch) and then outputting a count over the 1-wire protocol through the HEADER (which also carries 5V and GND) to an Arduino /...

Hi guys, long story short I'm missing a 12MHz crystal and two 1206-size caps to match (usually 20pf 50V) to finish my GrubDAC. If anyone has any around that they could drop in the mail for me (to avoid a Mouser order just for this), I'd be glad to paypal you a few bucks for the trouble. PM if...

Quick question - does anyone have a source for plastic standoffs (like these) for circuit boards in larger quantities and hopefully a better price?

I travel pretty often by way of air and need a good set of headphones or IEMs to block out the noise. From my experience IEMs are better at this but I'm open to suggestions. I've been looking at the Yuin OK series for awhile but I'm not sure whether they'd give great isolation as they're not...

So I acquired an old Beckman Circuitmate 9020 oscilloscope a few years ago and only recently dug it out of the garage and brought it to my apartment. It's a little beat up but in working condition (so far as I can tell). I'm having trouble finding any information on it other than user manuals...

I know this isn't entirely completely directed at Audio, so bear with me. This could be used to control audio devices (especially ones using the Arduino, which we're starting to see more and more of), so I hope I'm not entirely off topic here. I've been working on a project where I need to...

Anyone have recommendations for a DIY bench power supply kit? Obviously I'm not looking for exact precision or perfect regulation - just enough to power circuits I'm testing and such. Looking to spend under $100-150, must come with an enclosure (don't have the tools to do casework in my...

Can someone point me towards a source for female breakaway headers and female sockets? By female breakaway headers, I mean something like this SparkFun Electronics - Break Away Female Headers but in larger quantities and a lower price. By female sockets, I mean those single circular...

Sparkfun has audio jack breakout boards. Combined with the jack they're made for and some 90deg headers, they pop right into a breadboard, saving the hassle of soldering up a jack to leads and plugging the leads into the breadboard when you're prototyping. They're here. Disclaimer: I do not...

Does anyone know of / have an Orcad Capture (Pspice) model for the voltage regulators? I looked around google and a few of the manufacturer sites and couldn't find anything. Unfortunately I don't know enough about Pspice to model it myself, and although I could make it from components according...

I remember reading about these places where you could pay hourly or for a monthly membership, and you could use all sorts of fun electronics and machinery (like drill presses, laser cutters, etc). I've been racking my brain for an hour trying to figure out what to call them and put into google...

Are the OK2's worth double the price of the OK3's? I've heard the PK3 and found them a bit harsh on the high end. I listen to mostly rock, with a little indie, electronic, and classical. I'm leaning towards sticking to the OK3's because these will be my daily buds for walking to campus, and I...

Can someone point me towards some posts/sites on cable braiding? A forum search didn't provide any tutorials or too many details. I understand braiding in general but wanted to see what different geometries were being used, and the merits of them.