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  1. Ch33f

    +/- 12 V power supply acting weirdly(?)

    First of all: Yes I know, you should always measure the performance of a power supply under load. BUT: I just conjured up a little +/- 12 V supply with a 7812 and a 7912. After soldering the thing together I just hooked it up to my 30V lab suplly (which has only one channel, hence the need for...
  2. Ch33f

    Using an oscilloscope without a probe. Good or bad idea?

    Hi there, I want to measure current with my oscilloscope. So far, so easy. Just bodge in a little and precise resistor, like 1 Ω or so and measure the voltage across it. But I don't want to bodge that, I want a nice sollution. Now here is my idea: I wanted to make a little resistor box e.g...
  3. Ch33f

    Controll for Seven-Segment-Displays

    Hi everyone, as part of a bigger project I'm going to build a (hopefully) nifty little controll for a couple of seven segment displays (gonna call them 7SDs from now on) I had lying around from one of those cheap surprise packages. It's supposed to give a nice interface for a microcontroller...
  4. Ch33f

    Trying to understand a low voltage warning circuit

    Hi there everyone, Introduction: I'm kind of a newby in electronics but I am eager to learn and want to actually understand how things work instead of just (re-)using them. This is why I'm posting here. I hope this is the right form to post it on. In order to accomplish this goal I read...
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