UNBOXING WORLD'S SMALLEST ALL IN ONE WIRELESS PRINTER

UNBOXING VIDEO OF HP DESKJET 3775 INKJET PRINTER

This is a unboxing video of hp deskjet 3775 which is world's smallest all in one wireless printer made by hp. support this video and we will make another review video of it. Printer: https://amzn.to/2WGvdO5

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HOW TO MAKE WATER TANK LEVEL CONTROLLER FULLY AUTOMATIC (DIY) | MS TECH

circuit diagram of automatic water level controller

Now a days electricity bill is increasing because of our usage electricity providers don't have enough to give us and they increasing the bill,so today i decided to make automatic water level controller which will make your water pump fully automatic and no more overflows so we save much electricity and most importantly water.

We need 555ic,bc548 transistor-2,resistor 10k,100-2,diode 1n4007,relay 30a,dot board and some wires. This is simple circuit you can make it by watching the video below or by watching the circuit above.