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Summertime is holiday time but who will be looking after your delicate houseplants while you are away? Caring for plants is very often a hit or miss affair, sometimes you under-water and other times you over-water. This design seeks to remove the doubt from plant care and keep them optimally watered.  The principle of the circuit is simple: first the soil dampness is measured by passing a signal through two electrodes placed in the soil. The moisture content is inversely proportional to the measured resistance. When this measurement indicates it is too dry, the plants are given a predefined dose of water. This last part is important for the correct function of the automatic watering can because it takes a little while for the soil to absorb the water dose and for its resistance to fall. If the water were allowed to flow until the soil resistance drops then the plant would soon be flooded.  An Electronic Watering Can Circuit diagram : An Electronic Watering Can Circuit Diagram...

One way to provide good negative-voltage regulation is with a low-drop-out positive-voltage regulator operating from a well-isolated secondary winding of a switch-mode circuit transformer. The technique works with low-dropout types. Under all loading conditions , the minimum voltage difference between the regulator Vin and Vout pins must be at least 1.5V , IC LT1086 low-dropout voltage. If this requirement isn't met, the output falls out of regulation. Two programming resistors, R1 and R2, set the output voltage 12V, and the IC LT1086 servo the voltage between the output and its adjusting terminals to 1.25V. Capacitor C1 improves ripple rejection, and protection diode D1 eliminates common-load problems. Since a secondary winding is galvanically isolated , a regulator 12V output  can be referenced to ground. Therefore , in the case of a negative-voltage output , the positive-voltage terminal of the regulator connects to ground , and the 12V output comes off the anode of D1. The Vin ...

Google has launched the first three Android One Smartphones, starting at Rs. 6,299 in India. The launch of Android One Smartphones has been considered as an initiative, where. Indian buyers can own high-quality and advanced smartphones at affordable price tags. This initiative has started off in India, and will be launched in other countries later. Currently, Micromax, Karbonn and Spice has launched their first ever smartphones, running on the Android One platform. Later, other smartphone manufactures will also launch Android One running smartphones in India. India’s number one smartphone brand, Micromax has launched the ‘Canvas A1’, their first ever Android One Smartphone. The Micromax Canvas A1 is available exclusively on Amazon. India with a price tag of Rs. 6,499. At this price tag, this smartphone packs various advanced features making it a worth buy package deal. On the other hand, two more Android One smartphones, naming as Karbonn Sparkle V and Spice Dream Uno have hit the Ind...

Following two budget-friendly smartphones, BLU announced its flag grade Android phone – Life Pure. If you need a high performance smartphone, let’s go on checking. BLU Life Pure is a 5-inch Android smartphone with flagship performance that measures 142 x 69.4 x 7.7mm and weights 128grams. ures ultra-slim and minimal design and runs on Google Android 4.2 Jelly Bean mobile operating system, moreover, Life Pure comes with MediaTek MT6589T Cortex-A7 1.5GHz quad-core processor with PowerVR SGX544 GPU, 2GB RAM, 32GB internal storage, 5-inch full HD display at 1080 x 1920 pixels resolution with 441 ppi, 5-megapixel front-facing camera capable of full HD imaging and 13-megapixel rear autofocus camera with a 5-element lens, BSI sensor and LED flash. The smartphone feat Apart from that, other specs include GPS, Bluetooth 4.0, WiFi, Hotspot, FM radio and 2000mAh rechargeable battery. BLU Life Pure Android phone comes in two colors and costs $349 USD.