How to (re)build a custom kernel on CentOS There are plenty of how-to's about building vanilla kernel on all types of Linux'es. The top of the search results tell you about "the CentOS way" of building new kernel - using rpm etc. It might be the "right way" of obtaining a custom kernel, but it did not fit into my brains even after few reading attempts :) Hence this simplified old-style procedure, that proved to work well on modern CentOS.
Flood in the InternetThese days search engines throw tons of schematics of "Class A headphone amplifiers" on us. There we can find anything: from monsters capable of driving big loudspeakers to humble OpAmps heavily loaded by 30 Ohms without any hope for help. The big wave of so-called hybrid headphone amps is scary:
Dear friends, I have to apologize for not posting much on this blog lately. The reason is simple: I am swamped by the development of this site's Russian twin. There…
In this article:
- Linearity of professional equipment using budget OpAmps
- Low distortion precision AGC
- Can be battery operated: minimized EMI
How things began
Other good people provided ideas for this solution: notbrainsurgery @ livejournal Robert @ softwarerevisions.blogspot.com For some reason GoDaddy jailed hosting does not provide rsync, while it allows ssh user sessions to the host. It's not obvious how to move big chunks of data without "resume" functionality. Even worse for backup needs... Here's one of possible solutions based on my own experience. I hope this post could help someone too :)
It's relatively easy to screw the partition table on a USB key. I happened to have a quality 16GB USB key that got it all wrong (due to some of my experiments in the past :) - it was presenting itself as 250G drive. fdisk, sfdisk and hdparm all showed wrong disc geometry. I'd be happy to possess a little jewelry of 250GB, but I am afraid we'll have to wait a year or two for these to come. Sure I'd have problems should I try to use it as is for anything...Getting it all right turned out to be very simple - once I found what to do.
a nearly ideal LDO regulator gained quite some interest amongst readers. Meanwhile I managed to build two "barrel" multi-purpose power supplies based on this LDO circuit.
Working PrototypeCasing was always the biggest doubt in my DIY projects. Here I resorted to nice and cheap stainless-steel cans from Ikea with covers cut from a 6mm thick MDF. Perfect solution... to be stuck behind the desk.
|120W barrel power supply|
Ideal LDO Voltage RegulatorLDO = low dropout
|Ideal Low Dropout Linear Voltage Regulator ;)|