Personal Blog – Dushyant
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Standalone Temperature and Humidity Control v2

Sunday, December 8th, 2013

If you’ve reached here directly – please see:

http://dushyant.ahuja.ws/?p=740

I’ve modified the code to add the following:

  1. Used the OneButton library so that the setpoint can be increased by clicking button and decreased by long clicking the button
  2. Used the Timer library so that I don’t rely on delay – which was inaccurate
  3. Change the logic for temperature such that the heater gets switched on if the temperature goes below the setpoint. Makes more sense as you don’t need the heater to be on at the setpoint. Also, reduces chances of the heater malfunctioning by switching on and off all the time
  4. Used a similar logic for humidity – on when humidity is less than 50 and off when it is more than 60

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Physical Android Notifier

Saturday, November 30th, 2013

I wanted to create a simple notifier for my Android phone. Something that would blink whenever I have a missed call, or sms or whatsapp notification.

The hardware part was easy:

  1. Funduino Mini Pro
  2. Common Anode RGB LED
  3. Switch
  4. Bluetooth Breakout Board

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Digital Pin-Art – WIP

Wednesday, November 13th, 2013

I’m planning to create a digital “pin-art” board – something similar to the photo below.

Source: http://cdn.visualnews.com/wp-content/uploads/2011/05/Lulu-Guinness-11.jpg

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Standalone Temperature and Humidity Control

Monday, November 11th, 2013

Continuing from Standalone Arduino and Thermometer and Humidity Control, created a standalone thermometer and humidity control. Added the following features:

  1. Added a push-button to allow controlling the setpoint temperature
  2. Used the EEPROM library to save the setpoint temperature
  3. Enclosed everything in an extension cord with a power supply
  4. Left a socket to update programming as required

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Charlieplexed LEDs with Arduino (Induino)

Saturday, October 26th, 2013

Using ideas from:

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Lessons while travelling in South India

Friday, October 18th, 2013

Some lessons from my recent trip to Kodai Kanal:

  1. Do not underestimate Bangalore traffic
  2. RB1 is not a separate coach number – it means B1 with RAC seat – nearly missed my train because I couldn’t find the coach.
  3. Railway station with the same name as the city you wish to reach may not be in the city – Kodai Kanal Road station is almost 80 km from the city
  4. Do not trust google maps – shows Elephant Valley Resort right next to the Kodai Lake – its around 20 km from there.
  5. Do not book a non-AC bus – just because you do not think you’ll need AC – the bus was uncomfortable as hell.