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Modify 600Va UPS to an Inverter (12V to AC Conversion) - Upgraded version with cooler fan auto switching

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  First step you need to remove the buzzer otherwise it will keep making noise and irritating when you are using for long hours. Identify the buzzer and remove it safely using soldering iron and Desolder Sucker. Please refer this article which i already covered for using soldering iron and Desolder Sucker.  https://sajeetronics.blogspot.com/2021/05/soldering-basics-and-smd-soldering-on.html   Replace the 7 or 9 Amp Battery (Originally came with the UPS) with a CAR battery Connect Car battery + and - with the UPS Battery terminal + and - Now UPS will start produce AC voltage from AC out put terminals. But using this solution for long hours is not recommended Because  MOS-FET and Transformer gets heat when it's started DC to AC conversion Process. Normal UPS is designed to Use for 15-20 min only so if you need long hours you need a proper ventilation system inside the UPS.  Fixing a cooler fan To achieve that we need to Fix a cooler fan. But i have seen in the m...

Building a Low Cost Power Tank for 4G Router

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Required items    18650 3.7V – 4300mAh (2000mAh Actual) Li-ion Battery X 6 (You can use 3 as well) Some links in Sri Lanka to Buy https://nilambaraelectronics.com/product/3-7v-2200mah-li-ion-18650-battery/ https://www.daraz.lk/products/lithium-ion-icr18650-1500mah-icr-18650-37v-36v-li-ion-rechargeable-battery-for-portable-fans-and-solar-motion-sensor-lights-i120539339-s1035478092.html 3S 20A 12.6V Li-ion Lithium Battery 18650 Charger Protection Board PCB BMS Cell Charging Protecting Module   https://nilambaraelectronics.com/product/3s-20a-12-6v-li-ion-lithium-battery-18650-charger-protection-board-pcb-bms-cell-charging-protecting-module/ https://www.daraz.lk/products/3s-20a-126v-li-ion-lithium-battery-18650-charger-protection-board-pcb-bms-cell-charging-protecting-module-i125327759-s1042307495.html 1N4007 Rectifier Diode X4(nos)  https://www.daraz.lk/products/10pcs-rectifier-diode-assorted-1n4007-diy-kit-i122859337-s1040431779.html 1000uf/25v  Radial Elec...

Why Does My Generator Run, but Not Produce Electricity? Flashing the Field, AVR and Brush Holder Replacement

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  Loss of Residual Magnetism (Most Common) Generators work by moving electrical conductors through a self-created magnetic field. However, generators do not contain any magnets. The magnetic field referred to is created by taking some of the generator output voltage, converting it to DC, and feeding it into a coil to make an electromagnet. Generators start up by using something called residual magnetism. This is a small amount of magnetism left over from the magnetic field that was created the last time the generator was running. This little bit of leftover magnetism is enough to produce a small amount of electricity. This small amount is used to create an electromagnet. As the engine begins to turn this electromagnet, moving its electric field, through the stator windings, your generator will produce more power. However, if residual magnetism is lost, your generator will produce no power at startup. Loss of residual magnetism may be caused by the generation being out of use for a ...

Are you working from home ? Looking for power alternatives ?

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  Use your Car battery as a power source Option1: Use your car lighter port for Router and laptop with mini inverter Link to order the product : https://www.daraz.lk/products/bellylady-150w-car-power-inverter-dc-12v-o-ac-220v-usb-5v-auto-charger-adapter-for-laptop-voltage-i126132843-s1042974514.html?spm=a2a0e.searchlist.list.5.47332377TtGmPo&search=1 Option2: Use your car battery to power your Router and laptop with Sine wave inverter Link to order the product :  https://www.daraz.lk/products/max-2000w-4000w-6000w-dc-12v-to-ac-220v-power-converter-inverter-voltage-convertor-transformer-with-lcd-display-pure-sine-wave-aluminum-aalloy-2000w-i113150631-s1024070796.html?spm=a2a0e.searchlist.list.9.47332377HAzUbZ&search=1 Option3: Connect 12v battery directly to Router (9 volts DC internet router via a 12v battery) Connect a 7809 Voltage Regulator IC across the battery and connect the output of the 7809 to the router. I don't think the IC should heat as the current is only ...

LG Top Load Washer - PE Error code ( Water Level / Pressure Sensor ) FIX

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LG Error code details : https://www.lg.com/us/support/help-library/error-codes-washing-machine-CT00000305-20150140270078 PE Error Code PE The  error indicates that there is a problem with the water level sensor.   How a Pressure Switch Works in a Washing Machine A pressure switch, or water level control, allows your washing machine to detect when it's sufficiently filled. It can then close the valve from which your home or building's water supply into the machine. Pressure Hose Your washer contains an air-tight hose that runs from the body of the washer to the pressure switch. As the washer fills with water, the air that was in it is displaced, and has no way to escape but through the hose, gradually increasing the pressure on the switch. Water Level Setting Most washers allow you to set the desired water level yourself (usually low/medium/high settings). This simply changes the threshold of pressure at which the switch is told to redirect the power---the higher the th...

Sony Bravia 55" Double image / Image Flickering ( CKV - Clock Vertical Signal ) LED Panel Repairing

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Double Image fault solution through CKV, CKVB and STVP Signal Cutting. What is Ckv CKVB STVP in LCD TV?  Pulse-pulse CKV, CKVB, STVP used as pulse “Row driver” or also called “Gate – driver”. … What is CKV in LED TV?  The CKV signal detection circuit comprises a first LED, a second LED, a first light sensor, a second light sensor and a judging module. A node between the first LED and the second LED is used for receiving CKV signals output by the control panel. What is pair a signal ? Pair signals mean after the level shifter section we will get the separate output like CKV 1 , CKVB 1 and STV 1. before entering to Gate Driver IC [ COF ] these three signals are synchronizing each other its called signal paring. depending on COF ic this pair will be increase or decrease. example single COF IC is available in scalar board single pair signal only available (ckv 1,ckvb 1, stv 1) ckv is a positive pulse and ckvb is a generally negative pulse. CKV SIGNAL Other Names  COG, Gate dr...