Posted inOthers
Repair TP-Link TL-WR740N Router WAN port
This article describes how I repaired my router which had burnt WAN port at no cost.
Posted inOthers
Reduce Refrigerator bills with this Simple circuit
Refrigerator is a common household electrical appliance. When we buy refrigerator we try to minimize the electrical power consumption by looking for BEE 4 or 5 star rated ones which…
Posted inOscillator Others
What is dielectric resonator oscillator and it’s application
A dielectric resonator oscillator is basically a high frequency oscillator, operates within a range of few tens of gigahertz. The main frequency determining component is piece of dielectric material, usually…
Posted inOthers Solar Projects
Zero drop dusk to dawn solar charge controller by Sandeep
When you work with solar panels, you don't just need a panel to supply power, battery to store power and lights to glow, you will always need a good charge…
Yet another regulated power supply board
This is just a basic demo board of 78XX IC and LM317. LM 7805 and LM7812 are used here as 5V and 12V regulators. The supply for this board is…
Simple LM358 OP-AMP based USB Li-ion charger
UPDATE: https://www.circuitsdiy.com/usb-li-ion-charger-revision This is a simple li-ion charger without a dedicated li-ion charger IC. This circuit can be used to efficiently and intelligently charge any single cell Li-ion battery pack…
Posted inOthers
Simple Water level indicator circuit using Logic IC
This is a simple water level indicator circuit which can be used to indicate water at 3 stages EMPTY, LOW and FULL by three respsctive LEDs. The heart of this…
Posted inOthers
Super 3 stage resistor and continuity checker
The following continuity tester have a long range as well as mid and low range. There are 3 LEDs and they are for different ranges. The yellow one glows if…
Posted inOthers
Cheapest Mobile signal booster external antenna
There are some pretty signal boosters available in market which can only boost or amplify weak signal. But these products can’t bring unavailable towers. You can buy external antenna for…
Posted inOthers
5v to 12v converter – Simple DC voltage booster circuit
You can use this 5V to 12V converter circuit to easily get 12 volts from a 5V similar source. This is based of the theory that inductor holds current and…