Created on 20 Oct 2021

You will no longer die from your deadlift with Livelift!

Livelift monitors your posture while you are deadlifting. It will alarm you if you are destroying your lower back by not having a correct posture!


Minghan Gang


Zhichun Zhao


Aichen Yao


Chi Gao

Part Cost Quantity Total
Flex Sensor 4.5" $15.95 4 $63.80
Flex sensor for monitoring lower back form
Vibration Motor $2.15 4 $8.60
Vibration Motor for alert
Redboard $19.95 2 $39.90
Redboard microprocessor
3-axis accelerometer $19.95 3 $59.85
3-axis accelerometers for motion analysis
SparkFun Qwiic Cable Kit $7.95 2 $15.90
Micro controller Sensor Cables
Qwiic Cable - 500mm $1.95 5 $9.75
Long cables to connect distant controllers and sensors
USB micro b cable $4.95 2 $9.90
cable for program uploading and powering
Red LED button $4.25 4 $17.00
button for user interface
Green LED button $3.95 4 $15.80
button for user interface
SparkFun Qwiic Alphanumeric Kit $22.95 1 $22.95
display kit for user interface
9v rechargeable battery $26.99 1 $26.99
rechargeable battery for off computer use
9v battery clip $5.99 1 $5.99
9v battery clip to connect to microcontroller
Project Totals: 33 $296.43
Track 1 Base Budget: $300.00
Preferred Vendor Budget Bonus: $0.00
Remaining Budget: $3.57
Chi Gao 12 Feb 2022, 10:36 p.m. EST
Our progress: We started from exploring the parts we had. RedBoard is similar to Arduino and we managed to set up all of our environments. Then we started playing with flex sensors. By bending flex sensors, their resistance can change. We assembled a basic voltage divider circuit on bread board. Later we collected a few sets of data in the gym, and the result is not quite good... Relying on one sensor only is too inaccurate. Therefore we decided to use more flex sensors and... accelerometers! Exploring with accelerometers was a hard journey. We spent some time resolving conflicting devices on the I2C bus. Then we discovered address jumpers (Thanks Han!) on accelerometers and buttons! Yay! After some struggles with software design and if-elses for our sensors (Thanks Aichen for flex sensor development and Han for accelerometer development!), we put everything together on a T-shirt. Wearable technology! Special thanks to Zhichun on sewing sensors on our T-shirt! She learned how to use that sewing machine in Techspark all by herself! 👏 With all wirings and soldering (Thanks Chi!), our final prototype is up. Han will be our deadlift demo hero for tomorrow (we wrote this on Feb 12). It is a great experience for all of us. We learned how to use Redboard, sensors, assembling a distributed sensing system, and lots of fun and joy in building! We will definitely continue prototyping with those cool stuff on Sparkfun! GO GO LIVELIFT!!!!