Cheap wireless bike computer: INBIKE IN321/IC321 from Banggood

Review of my cheap but decent INBIKE IC321/IN321 wireless waterproof bicycle computer with LED Back-lighting from And how I install it on my 2017 Giant Trance 2 trail mountain bike.

July 5, 2020: The unit finally gave out on me. I left it on the bike while riding in the rain. Water finally found its ways inside the unit and destroyed the LCD screen. I tried to blow dry it with hair dryer in the hope to revive it but couldn’t. Price of the unit jumps up to roughly about $25 CAD including shipping. But considering this unit lasts me 3 years, I think it’s OK. Lesson learn: wrap it with zip-lock bag while riding in the rain. 🙂

cheap bike computer from Banggood

Sep 13, 2018: After almost 1 year it’s still working perfectly despite the fact that the plastic tabs at the back were broken off. I used 3M Scotch #4011 double sided tape (this ape doesn’t leave residue) to mount it on my handle bar.

Product Feature:

  • 12 functions : 1. Clock 2. EL back light 3. Aveage speed 4. Riding time 5. Total distance / total ODO 6. Stop Watch 7. Metric / imperial alternative 8. Riding speed 9. Max speed 10. Riding distance 11. AUTO ON / OFF
  • Bicycle odometer with LCD back-light.
  • Easy to read LCD display with large screen.
  • Easy to control with mode touch, ideal companion for your bicycle.
  • Easy to install firmly with mounting accessories.
  • Perfect to use for riding and other outdoor actives.
  • Ideal assistant for bicycle training.
  • Portable, durable and convenient.
  • Time display function, also can be used as a stop watch wonderful gadget for travelling.

Note: The computer back-light is only for 3 seconds. The installation of the head magnet can only be on a round spoke.

R.I.P my beloved Banggood wireless waterproof bicycle computer. I will remember you through this video at Dagmar North Trails in Uxbridge, Ontario.

Cheap wireless waterproof INBIKE bike computer

DIY All Aluminum 3D Printer

After 5 months of hard work on this 3D printer project, this is my final result. An all aluminum frame 3D printer. I designed this 3D printer model in Solidworks based on some other 3d printers I found online (ie Aluminatus TrinityOne, MendelMAX v2, Lulzbot TAZ, etc….) and then CNC machine myself most of the parts you see in this video.

DIY all aluminum frame 3D printer

If you like my work, please consider donating. To donate, please click

Download SolidWorks source files

I will list primary parts of the part I use in this 3D printer project and some of my comments/review about it.

NEMA 17 Stepper motors from StepperOnline – excellent customer service, will exchange bad motor if you run into one without question.

SeeMeCNC EZStruder Cold End – used to be good quality and sturdy but not anymore. I would not buy another one from them. Holes are not lined up with stepper motor holes unless you drill it bigger. Material used is not that great. So soft and flexible.

Gadget3D electronic parts which include RAMPS 1.4, stepper driver and Arduino Mega board, etc… and all the wires for you to connect – excellent customer service from China and fast shipping.

8020 Inc aluminum extrudions profile – excellent stuff to make 3D Printer with or any other machine for that matter.

Maker’s Tool Works TR10x2 lead screw and nuts – I had to ditch this and replace with M6x1 stainless steel threaded rod which i believe is more reliable. I might use these lead screw for other project like DIY CNC mill or CNC lathe.

Gates PowerGrip GT2 belt from 3D Maker World – excellent product.

E3D v5 Hotend Extruder – For the look E3D looks better than a J-Head Mk V-BV but in terms of PLA printing J-Head hotend leads by far.