Martin's corner on the web

Misc

DHT22 accuracy test part 2/2

I have measured the relative humidity as per my set up, and got steady readouts exactly in the 75% area as expected: DHT22 Library Demo Requesting data…Got Data 25.50C 75.20% Integer-only reading: Temperature 25.5 C, Humidity 75.2 % RH Requesting…

DHT22 accuracy test part 1

I have been boggled for a while about the Relative Humidity data that I gather, I get some higher than expected reading. I blogged about this in this post and @Dimitrios suggested in the comments that my box my be…

Scope screenshots

One of the cool things about having a digital scope is that you can take screenshots and post them in blogs :). I wanted to check how a Funky v2 was behaving, so hooked one to measure its current consumption…

Oscilloscope

I have finally decided to get myself an oscilloscope, my choice ended up to be a Rigol DS1052E. The model seems to be pretty popular, and for a price tag of 309 EUR with delivery, I could no longer resist.…

RFM12B End of Life

EDIT March 2015: [It has been two years since this post, and the RFM12B is¬†still widely available. I guess the rumors at that time were exaggerated widely.] There has been bad news for the RFM12B ecosystem last week, namely the…

Wallpaper prank

I wish I did this for April 1st, but here is it anyway ūüôā I wanted to test out the HID keyboard features of the Arduino Leonardo compatible Funky v2, so during my research on the subject ¬†I accidentally stumbled…