Quick Negative Voltage for an Op Amp
It is a classic problem when designing with op amps: you need the output to go to zero, but — for most op amps — you can’t quite get down …read more Continue reading Quick Negative Voltage for an Op Amp
Category Archives: negative rail
Negative Voltage Pushes AVR to New Heights
If we say that a hacker is somebody who looks at a “solved” problem and can still come up with multiple alternative solutions, then [Charles Ouweland] absolutely meets the grade. Not that we needed more evidence of his hacker cred given what we’ve seen from him before, but he recently wrote in to tell us about an interesting bit of problem solving which we think is a perfect example of the principle. He wanted to drive a salvaged seven segment LED display with an AVR microcontroller, but there was only one problem: the display needs 15V but the AVR is …read more
The Negative Rail Explained
With the high availability of modular components and incredible wealth of information and tutorials online, it’s now easier than ever for hackers and makers to assemble complex electronic projects without getting bogged down with the theory behind it all. But the downside is that the modern electronic hobbyist often doesn’t have as deep an understanding of the low-level concepts that they would have if they had to build everything from scratch. This can be a problem when they try diagnosing and repairing faults, or when they start to branch out into reverse engineering.
Which makes “Building Blocks” by [David Christensen] …read more