Category Experiments

Embedded system, Engineering, Experiments, Optics

Testing Basic Optical Tweezers (Part 2)

0. Experiment reports: In this experiment, I captured a record of Brownian movement which highly resembles the simulation by OTGO…

@keiichin
July 23, 2025

Engineering, Experiments, Optics

Testing Basic Optical Tweezers (Part 1)

I was inspired by a YouTube video, which made optical tweezers seem much easier than I’d ever thought. It indeed…

@keiichin
March 16, 2025

Engineering, Experiments, RF

2FSK over the air

1. What’s 2FSK (two frequency represent 0 and 1) 2. Connect CC1101 with Arduino See 2ASK over the air. 3.…

@keiichin
August 16, 2024

Engineering, Experiments, RF

2ASK over the air

1. What’s 2ASK (simply ON-OFF) 2. Connect CC1101 with Arduino Need to connect CC1101 first. I used Arduino, and here’s…

@keiichin
August 16, 2024

Electronics, Engineering, Experiments

Improve a Geiger counter

1. Problems Recently I found a Geiger counter on Amazon which can’t work well. After trying so many ways to…

@keiichin
July 31, 2024

Electronics, Embedded system, Engineering, Experiments, Optics

Zip laser transmission(speed test)

The fastest speed in this video is 1M BaudRates. So the theoretical transmission speed is close to : $\frac {1000000BaudRates}{8bit*1024}=122…

@keiichin
December 13, 2023

Electronics, Embedded system, Engineering, Experiments, Matlab

デバイス・ソフトウェア使用: #GP2Y10141325 #stm32f103ze #matlab #電気抵抗150オーム #蓄電器220uf #keil uVision5 Test/SourceCode GP2Y10141325を用いて、pm2.5を測定してから、uartを通してmatlabでデータを分析した。その回路図またはプログラミングコードはこちらです::#GP2Y10141325#stm32f103ze#matlab#電気抵抗150オーム#蓄電器220uf pic.twitter.com/Ayh11geXh7— プログラミング君 (@lovejp_1) September 20, 2021 GP2Y10141325を用いて、pm2.5を測定してから、uartを通してmatlabでデータを分析した。その回路図またはプログラミングコードはこちらです::#GP2Y10141325#stm32f103ze#matlab#電気抵抗150オーム#蓄電器220uf pic.twitter.com/Ayh11geXh7 pic.twitter.com/T8PJ4vuUb1— プログラミング君…