ONU/Router UPS - DIY Project/Gadget
Parts
৳473
৳210
৳63
৳105Battery Charging Module
Battery Charging Module 6-30V buck converter to 5VCircuitBazar BD · In stock
1
৳105
৳42
৳400
৳66
৳44
৳105
Your kit — price breakdown
| # | Part | Seller | Unit price | Qty | Line total |
|---|---|---|---|---|---|
| 1 | BatteryBigmax 3.7v 10000mah Lithium Polymer Battery | CircuitBazar BD | ৳473 | 1 | ৳473 |
| 2 | Battery ChargerCharger Circuit 12.6V 3A | CircuitBazar BD | ৳210 | 1 | ৳210 |
| 3 | BMSBattery Management System | CircuitBazar BD | ৳63 | 1 | ৳63 |
| 4 | Battery Charging ModuleBattery Charging Module 6-30V buck converter to 5V | CircuitBazar BD | ৳105 | 1 | ৳105 |
| 5 | Battery Level IndicatorBattery Level Indicator 0-100% | CircuitBazar BD | ৳105 | 1 | ৳105 |
| 6 | Ac CordAc Cord 200cm | Gadget Corner | ৳42 | 1 | ৳42 |
| 7 | Booster ModuleBooster Module 3v in to 30v out adjustable | CircuitBazar BD | ৳200 | 2 | ৳400 |
| 8 | JackMale DC Jack 5.5mm x 2.1mm | CircuitBazar BD | ৳11 | 6 | ৳66 |
| 9 | JackFemale DC Jack 5.5mm x 2.1mm | CircuitBazar BD | ৳11 | 4 | ৳44 |
| 10 | CaseCase for the DIY Project/Gadget Kit | Gadget Corner | ৳105 | 1 | ৳105 |
- Parts subtotal (one kit)
- ৳1,613
- × Kits
- 1
- Items total
- ৳1,613
- Delivery
- 2 parcels from 2 sellers — charged at checkout
- Reward
- ৳100 coupon after delivery (not taken off this price)
- You pay now
- ৳1,613
Prices are live and checked again at checkout.
Overview
DIY Project/Gadget Kit for ONU/Router UPS
- Keeps your ONU or router running through short power cuts
- Rechargeable lithium polymer battery pack
- Battery management board (BMS) to protect the cell
- 0-100% battery level indicator
- Adjustable booster module to match your device's voltage
- DC jacks (male and female) for clean, swappable connections
- Case included, so the build is tidy and safe to keep on a shelf
Tools needed
- Soldering iron and solder
- Multimeter
- Wire cutter and stripper
- Hot glue gun or double-sided tape
Build guide
- 1
Check the parts match
Read each part's voltage and current before you start. The cell, the charger and the BMS must all agree on the number of cells and the charging voltage. Ask the AI to check compatibility if unsure; it is help, not a guarantee.
- 2
Wire the battery to the BMS
Connect the battery pack to the BMS board following its markings. Double-check polarity with the multimeter before soldering.
- 3
Add the charging path
Connect the AC cord side to the charger circuit, and its output to the BMS charge input. Keep mains wiring insulated and away from the low-voltage side.
- 4
Set up the booster
Connect the BMS output to the booster module input. With nothing else attached, turn the trimmer until the multimeter shows the voltage your ONU or router needs. Never guess this value.
- 5
Fit the indicator and the jacks
Wire the level indicator across the battery, and the DC jacks to the booster output so you can plug the router in and out.
- 6
Close it up and test
Fix everything inside the case, plug in the router, then switch the mains off and on to check that it keeps running through the cut.
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