Experiments&Design-CHINKEII's notes

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2025-03-16
Build a homemade optical tweezer In order to capture a 5um particle, it's easier to use the geometric optics theory to get start with. So I chose a bigger particle (5um) which is simi
- 2025-03-16
- 40
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2024-08-16
2FSK over the air 1. What's 2FSK (two frequency represent 0 and 1) 2. Connect CC1101 with Arduino See 2ASK over the air.
- 2024-08-16
- 49
- 1
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- Experiments&Design
- RF
2024-08-16
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 pinout of CC1101 module:
- 2024-08-16
- 74
- 0
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- Experiments&Design
- RF
2024-07-31
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 find the problem, finally I figured out. I
- 2024-07-31
- 53
- 0
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- Experiments&Design
- Physics
2023-12-13
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 KB/s.
- 2023-12-13
- 24
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- Optics
- Experiments&Design
2023-12-11
Long-pass filter & Short-pass filter 1. 短波通過フィルター薄膜構成: A|{L \over 2}H{L \over 2}|^7G {L \over 2}:Lについて光路差{１ \over 8} 波長　{H}:Hについて光路差{１ \over 4} 波長 A: Air(inde
- 2023-12-11
- 34
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2023-12-01
Zip laser transmission(30kb/s~50kb/s) 1.調整可能受信機： 2.受信機回路
- 2023-12-01
- 53
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- 0
- Optics
- Experiments&Design
2023-11-27
PM2.5 measurement & Matlab real-time plot 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/
- 2023-11-27
- 26
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- Experiments&Design
2022-10-11
How a fiber temp sensor works 1. Principles (Mach-Zehnder Interferometer) When light emitted from a source passes through a beam splitter, it splits into two beams with identical p
- 2022-10-11
- 22
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2022-10-09
Simulation of F-P laser cavity's stable mode ソースコード: clear; clc; clf; figure(1); hold on; lambda=632.8*10^-3;%um L=100*lambda; k=2*pi/lambda; a=25*lambda; C=sqrt(1i/(lambda*L)*exp(-1i*k*L)); for
- 2022-10-09
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