In the next phase of creating a PCB with KiCad you must connect the components to “modules” (a term KiCad uses to refer to footprints) with cvpcb. You can open cvpcb from the KiCad main window by pressing the second large button. cvpcb will issue a warning about not finding a .cmp file but this is normal before you have saved with cvpcb (which in turn creates the .cmp file). […]

Categories: KiCad Tutorial

Recently I have been using KiCad as my one and only EDA (Electronic Design Automation) tool and I think it’s surprisingly good. I’m not sure why it is not more widely used (maybe because of the fairly crappy website?) because it really is comparable to Eagle and other cheap/free EDA tools. The biggest pro is of course the fact that KiCad is an open source software and has no limitations on […]

Categories: KiCad Tutorial

Edit: Schematic had a bug, the INT pin on the DS3234 should be connected to pin 2 on the arduino, not the 32kHz pin! I updated the schematic. I bought a small aquarium (54l) as an impulse buy and I needed some lights for it, so naturally I wanted to use LEDs. I also needed a timer for the lights. I also wanted the lights to fade in and out […]

Every once in a while I’d have needed a function generator but since I didn’t have one I always had to resort to some sort of quick and poor 555 kludge or something similar. I spotted a nice looking DDS (Direct Digital Synthesis) kit meant for the Juma RX-1 receiver that uses the AD9833 DDS chip. I figured I should be able to use it as a function generator because the frequency range […]

I’ve been thinking about making a temperature logger for my room and my computer, I set on using DS18S20 sensors from Maxim because they’re common, cheap and overally pretty ideal. My computer is so new that it does not have a serial port (not 100% sure, I think there might be a pinheader on the motherboard with serial port connections) so I have to use USB for interfacing. Next thing […]

I saw a cool app-note from Maxim that described a gamma-photon detector which used a regular PIN-diode as a sensor. The actual circuit looked simple enough so I decided build it, you can never have too many measurement instruments right? The detector in itself is pretty simple, just some op-amps and a comparator. I decided to build it with all the bells and whistles so I included a digital potentiometer so you can […]

I’ve had the need to measure some small currents a few times and my cheap multimeter is not exactly the best tool for that. I decided to build a current adapter (a “transresistance amplifier” to be exact!). I already had almost all the parts for a µcurrent adapter created by Dave Jones (µcurrent) which fit the bill nicely. The device is basically a run-off-the-mill current shunt with an amplifier. The […]