Home Automation – Side Lights

This time I used a ready-made photo-electric switch that you can get off of Amazon or eBay for around ₹350. The PE switch controls two lights on the East wall: one facing North and lighting up the courtyard walkway, and the other facing South. I used these neat screwless terminal connector blocks. No more twisting... Continue Reading →

Advertisements

Light Switch Automation 2

Just got this photo-electric switch that you can get off of Amazon or eBay for around ₹350. It is based on a fairly simple circuit using an IC 555. I remember making similar circuit in my high school days, re-purposing an IC 555 to trigger with an LDR voltage divider as input (a shout-out to... Continue Reading →

Warm White LEDs

Overtime I've replaced CFL bulbs with warm-white LEDs (due to the health risk due to the level of blue light present in pure white LEDs). Here's a review of the warm-white LEDs I've tried. Color: Philips Stellar Bright 14W, 3000K, 1300lm (93 lm/W): Slightly more whitish warm-white. Similar to a 100W incandescent bulb or halogen... Continue Reading →

Home Automation – Front Lights

This is for future reference, specific to home wiring. See Light Switch Automation for general details on controller and wiring. Added a photoelectric switch to control the front yard lights. Without the controller, the switchboard wire (yellow) is connected directly to the Live/Red wire of the AC power source. With the controller in place, the... Continue Reading →

Home Automation – Courtyard Light

This is for future reference, specific to home wiring. See Light Switch Automation for general details on controller and wiring. Added a photoelectric switch to control the courtyard light hanging from the ceiling of the back house upper floor balcony. The controller is inside the switchboard inside the house. I housed this sensor in a... Continue Reading →

Light Switch Automation

Wired up an automated light switch for under ₹400. Got the parts off of eBay: Photoelectric relay module: XH-M131 - ₹150 5V 3W DC SMPS module: HLK-PM01 -  ₹150 Wires: 1 sq. mm, multi-stranded, 0.5 meter each of Red, Black, Yellow - ₹15 Wires: thin 2-core cable, aka "speaker wire", 5 meters for placing the... Continue Reading →

Gigaset A490

Cordless phone wasn't working, it would turn itself off within 3min. Opening the phone (Gigaset A490), did not see any noticeable loose connections or shorts. Only damage is that the paper from the speaker cone had been eaten away leaving lots of black powdery residue all over the phone. Just cleaning the PCB with rubbing... Continue Reading →

Drip Irrigation – Algae

Within a span of 2 months, algae started appearing in the inlet and outlet tubes. As expected, following nature's law of exponential growth, within the next 2-3 months it filled the whole tube, pretty much clogging the solenoid valve inlet and outlet. I'm guessing the exposure to sunlight from the transparent tubes is causing the... Continue Reading →

Drip Irrigation Automation

Automated the watering of Drip Irrigation by using a solenoid valve controlled by an Arduino board. Note that while I played around with a soil moisture sensor, which works fine in the lab, but I decided not to use it in the field for the following reasons: Corrosion of sensor electrodes due to salty water.... Continue Reading →

Blog at WordPress.com.

Up ↑