1. Voltage Regulator

    To use the ESP8266 and the PPD42NS together we need 5V and 3.3V.

    There are some ways to achieve this.

    First option

    Buy a LM1117.

    Second option

    I didn't have a LM1117, but got a LM317 and two resistors.

    The schema to build a voltage regulator with this ...

    Tagged as : arduino
  2. Imagegeneration for Kindle 4

    Task: Generate images displayable on a Kindle 4.

    Example code using Python and Pillow:

    # -*- coding: utf-8 -*-
    from PIL import Image, ImageDraw, ImageFont
    image = Image.new("P", (600,800), 255)
    # generate a 8 bit greyscale palette
    def palette():
      for i in range(0,256):
        yield i;yield i; yield i
    image ...
    Tagged as : linux
  3. Around the Bodensee by bike

    With a small group I cycled from Konstanz to Konstanz via Bodman, Überlingen, Friedrichshafen, Lindau, Bregenz (AT), Rohrschach (CH) and Kreuzlingen (CH). We started on a Wednesday an 11:30 in Konstanz after arriving by train, stayed the first night on the Camping site Camping Birnau-Maurach near Uhldingen-Mühlhofen and the ...

    Tagged as : quantified-self bike

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