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+---
+title: ES120 USB-C mod
+date: 2025-03-05
+tags: screw driver, pcb, 3d print
+category: hardware
+summary: Add a USB-C port to your Miniware ES120 screwdriver.
+---
+
+I own a Miniware ES120 electronic screwdriver. It's one of the last devices in my household that still has a microUSB
+connector which is pretty annoying. So I modded it to use USB-C. The mod is quite simple, you need a small PCB with the
+USB-C port, a new 3d printed end cap that sticks out a little and you need to solder the connections to the original
+PCB. In the end everything looks pretty neat and works really well.
+
+Here's a little build guide.
+
+# BOM
+
+| Part              | Count | Schema Ref | Description | Mouser | LCSC |
+| ----------------- | ----- | ---------- | ----------- | ------ | ---- |
+| GCT USB4120-03-C  | 1     | J1         | USB-C port  | [640-USB4120-03-C ](https://mou.sr/3Whgqrz) | [C3445864](https://www.lcsc.com/product-detail/USB-Connectors_Global-Connector-Technology-USB4120-03-C_C3445864.html) |
+| 5.1 kOhm Resistor | 2     | R1,R2      | 0603/1608   | [667-ERJ-3EKF5101V](https://mou.sr/41IiRG1) | [C2907114](https://www.lcsc.com/product-detail/Chip-Resistor-Surface-Mount_FOJAN-FRC0603J512-TS_C2907114.html) |
+
+You can get the parts on [Mouser](https://eu.mouser.com) or [LCSC](https://www.lcsc.com). Get the PCBs from
+[Aisler](https://aisler.net/) or [JLCPCB](https://jlcpcb.com/). The 3D printed end cap can be ordered at
+[JLC3D](https://jlc3dp.com/). They can even assemble everything for you if the parts are too small for your taste and
+you don't want to solder it yourself.
+
+The endcap can also be 3D printed at home, at any other 3D printing service or at your local hackspace.
+
+# Additional parts
+
+To connect the breakout board to the PCB you will need some enameled wire or single core cable strand.
+
+# PCB
+
+![front](https://gitlab.com/XenGi/es120-usb-c-mod/-/raw/main/es120-usb-c-front.png)
+![back](https://gitlab.com/XenGi/es120-usb-c-mod/-/raw/main/es120-usb-c-back.png)
+
+The gerber files are zipped in the `production` folder. Upload them to the PCB fab and make sure the PCB has a thickness
+of only 1mm. There is really not much space in the housing.
+
+# Endcap
+
+![endcap](https://gitlab.com/XenGi/es120-usb-c-mod/-/raw/main/cad/rev2/endcap.png)
+
+You can find the 3D model in the [repository](https://gitlab.com/XenGi/es120-usb-c-mod) or on
+[Printables](https://www.printables.com/model/1216140-endcap-for-miniware-es120-usb-c-mod).
+
+If you want to print it yourself, I'd recommend using a 0.25mm nozzle. I printed it in
+[Prusament PETG Prusa Galaxy Black](https://www.prusa3d.com/product/prusament-petg-prusa-galaxy-black-1kg/) and it came
+out pretty nice.
+
+# Integration
+
+1. Unscrew the end piece of the screwdriver
+2. Unscrew display with Torx T3
+3. Remove display cover
+4. Remove PCB
+5. Desolder microUSB port
+6. Solder wires from PCB to USB-C adapter
+7. Insert PCB back into the case
+8. Put display cover back on
+8. Put adapter PCB into endcap
+9. Put endcap into the slots so it fits snug
+10. Screw on the metal end piece
+11. Put the display screw back in
+12. Profit!
+
+Try to charge the screwdriver and connect it to a PC to check if power and data lines work again.
+