Step 1: Prepare the Base Panel
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- Used white acrylic sheet (3 mm thick, 14 × 9 cm)
- Drilled 4 holes to match LCR meter mounting holes
- Inserted plastic/metal spacers in holes
- Glued spacers firmly to the acrylic sheet for mounting support
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- Placed LCR meter on spacers
- Tightened 4 screws to fix LCR meter on acrylic
- Took 18650 battery holder (2P)
- Positioned it below LCR meter on acrylic (centered)
- Glued battery holder firmly to acrylic for strong hold
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- Took Powerbank module
- Positioned with USB port facing outward (side)
- GluedPowerbank module on bottom-right side of acrylic
- Took Boost converter module (XL1308/SX1308)
- Fixed it on bottom-left side of acrylic
- Used glue to secure both modules in place
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- Used medium-thick copper wire, bent to required shape and length
- Connected negative (-) of powerbank module to negative (-) input of boost module, soldered firmly
- Used another copper wire to connect positive (+) of powerbank module to positive (+) of battery holder, soldered in place
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- Connected output negative (-) of boost module to:
- Negative (-) of battery holder
- Negative (-) of LCR meter
- Soldered all joints firmly
- Connected output positive (+) of boost module directly to positive (+) of LCR meter, and soldered
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Step 7: Add ON/OFF Switch1 / 5
- Soldered one copper wire from powerbank module +ve (or +ve of battery holder) – free end left
- Soldered another copper wire from +ve input of boost module – free end left
- Took 2-pin ON/OFF switch
- Soldered both free wire ends to the 2 legs of the switch (one wire per leg), as shown in the image
- This allows switching power to the boost module
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- Inserted 2× 18650 batteries (recovered from old laptop battery pack – good quality cells)
- ⚠️ Check battery voltage and condition before use for safety
- Placed batteries into the 2-cell holder
- After inserting, Switch ON and used a screwdriver to adjust the boost module preset
- Set output voltage to 9V using a multimeter
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- 3D printed an outer case for side protection
- Installed case on acrylic sheet using FlexKwik gum (strong adhesive)
- For the top cover, used a clear acrylic sheet for better component view
- Laser-cut holes for:
- Power switch
- LCR test button
- Component testing area
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- This device supports battery charging and mobile power output
- To charge the internal 18650 batteries, plug a USB cable into the powerbank module input
- A red LED blinks during charging
- To charge a mobile device, connect it to the USB output port
- You can also power or charge small USB gadgets like:
- Mobile phones
- Earbuds/EarPods
- Smartwatches
- USB lamps or fans
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- First, switch ON the power using the ON/OFF switch
- Insert the component legs into the LCR meter’s ZIF socket
- Lock the socket by pressing down the lever
- Press the test button on the LCR meter
- Wait a few seconds — the component type and full details (value, pinout, etc.) will appear on the display
- Your 2-in-1 Portable Component Tester & Mobile Charger is now ready!
- Enjoy testing components and charging devices anytime, anywhere
- ✅ Reliable, compact, and DIY-friendly
- Watch the full build videofor reference and live demo
- Thank you for reading! 🙏
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