How to make a Mini Power Bank


Don’t throw away the old Mobile battery. The high efficiency Lithium Ion battery can be reused to make a Mini Power bank useful as a Travel Mobile charger. For this, you needs a Lithium battery charger Module and a Mobile charger module in addition to the battery. Both modules will cost around Rs.100.
Continue reading

Advertisements

How to fix PIR sensor Alarm


PIR sensor is the ideal device to use as Surveillance systems that operates by sensing human body heat. It triggers the alarm from a distance of 10 meters when a human passes. It operates both day and night. Let us see how to fix it on the wall
Continue reading

How to set the Re trigger Jumper in PIR sensor Module


The PIR sensor module has a Jumper arrangement to select single trigger and re trigger modes. Let us see how it works Continue reading

How to connect PIR sensor Module


It is important to know the connections of PIR sensor module. It is easy to connect it with alarms, relay to drive AC load etc. Let us see Continue reading

How PIR Sensor works


PIR sensor module is an ideal device to make efficient alarm systems and save energy lights. Let us see how it works?

Continue reading

How to make a simple Transformerless Power supply


Most simple Transformerless power supply that can convert 220 V AC to DC. Out put DC depends on the value of the Zener used. Output current is 60-80 mA.
See the step wise procedure

Continue reading

How to Convert SMPS to Bench Power supply cum charger



Don’t throw away the SMPS power supply when the Computer damges. SMPS is a high current device that gives different regulated voltages from the output wires. It has numerous wires to give different voltages . So you can make a good Multi voltage power supply for the Projects or use as battery charger for different types of batteries. It has total isolation from Mains and output is safe DC.
Continue reading