The negative terminal ( GND) is connected to the boost converter IN- terminal. The NC contact of the relay is connected to the boost converter LM2587 IN+ terminal. The positive terminal ( Vbus) is connected to the relay COM contact. The power from the power bank is fed to the UPS through a micro USB port. A 5mm green LED with current limiting resistor is connected to 12V and Ground The relay terminals C1 and C2 are connected to the positive and negative terminals of the input DC jack. The positive terminal of the input DC jack is connected to the positive terminal of the output DC jack through a Schottky diode ( 1N5822 ). The voltmeter display is used to display the output voltage so that you can easily set the output voltage as per your requirement ( 12V or 9V ). Two LEDs are used for indicating the healthiness of the two power sources. The two diodes 1N5822 are used to block the reverse current flow. When the mains power fails, the relay coil will be de-energized, the COM contact will be connected to the NC contact and the stored energy in the power bank will be fed to the boost converter input. The working of the circuit is very simple, in normal condition, power from the mains is drawn by a 12V DC adapter to provide power to the router and energize the relay coil ( COM contact connects to NO contact ). Boost Converter Module – LM2587S ( Amazon ) Output Voltage Display for setting 9V or 12Vġ. Back up time depends on power bank capacityĥ.
#28 volt meter how to#
In this post, I will guide you on how to make a mini UPS for your Router that can run by using the power bank.ģ. DIY Mini ups for wifi router ( Light and Cheap ) I have already posted an article on DIY Mini UPS, but I have received so much feedback for making a UPS that can be run by using the power bank.
Using a conventional UPS ( Bulky and Costly )Ģ. It is annoying if you are in an important meeting/webinar through Zoom, WebEx, or MS-Team, and there is an interruption due to power cuts.ġ. More and more of us are working from home these days, and that means your home’s WiFi networks are more important than ever.Īnyone with a fixed-line connection will know that their WiFi drops whenever the power goes out. The pandemic COVID-19 outbreak forced companies to continue with work-from-home policy to maintain social distancing and for business continuity.
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