BOM-DAT/thyristor-dat/thyristor-dat.md
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@@ -15,6 +15,12 @@
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- **Package**: Stud type (high-power package for heatsinking)
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+
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+
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+
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+
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+
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+
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## BTW69 Series - 55A SCRs - Standard SCRs
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20 26
IT(RMS):55A VGT: 1.5V VDRM VRRM:1000Vand1200V
Board-dat/SMO/SMO1003-dat/SMO1003-dat.md
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@@ -12,4 +12,6 @@
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## ref
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+- [[sensor-IR-reflective-dat]]
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+
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- [[SMO1003]]
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Board-dat/SMO/SMO1070-dat/SMO1070-dat.md
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@@ -1,7 +1,7 @@
1 1
2 2
# SMO1070-dat
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-
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+[legacy wiki page](https://www.electrodragon.com/w/TCRT5000)
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6 6
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## TCRT5000 Module SCH
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@@ -33,9 +33,12 @@ full module SCH
33 33
- [[ITR9608-dat]]
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* ITR9909
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+- [[TCRT5000-dat]]
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+
36 38
37 39
## ref
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-- [[IR-reflective-sensor-dat]]
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+- [[sensor-IR-reflective-dat]]
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+
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- [[SMO1070]]
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Tech-dat/Sensor-dat/IR-reflective-sensor-dat/2023-11-20-14-14-00.png
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Tech-dat/Sensor-dat/IR-reflective-sensor-dat/IR-reflective-sensor-dat.md
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-
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-# IR-reflective-sensor-dat
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-
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-- [[SMO1070-dat]]
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-
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-
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-
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-## Applications
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-
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-* Meter pulse data sampling
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-* Paper shredder machine detection
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-* Obstacle detection
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-* Black and white line detection
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-
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-
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-
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-## IR TX RX pair module
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-
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-![](2023-11-20-14-14-00.png)
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Tech-dat/Sensor-dat/Infrared-sensor-dat/Infrared-sensor-dat.md
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-
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-# Infrared-sensor-dat
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-
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-## Demo
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-
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-https://t.me/electrodragon3/192
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Tech-dat/Sensor-dat/reflective-sensor-dat/reflective-sensor-dat.md
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-
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-# reflective-sensor-dat
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-
Tech-dat/Sensor-dat/sensor-Infrared-dat/sensor-IR-reflective-dat/2023-11-20-14-14-00.png
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Tech-dat/Sensor-dat/sensor-Infrared-dat/sensor-IR-reflective-dat/2025-10-26-17-27-04.png
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Tech-dat/Sensor-dat/sensor-Infrared-dat/sensor-IR-reflective-dat/sensor-IR-reflective-dat.md
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+
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+# sensor-IR-reflective-dat
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+
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+- [[sensor-photoelectric-dat]]
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+
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+## board
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+
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+- [[SMO1070-dat]] - [[SMO1003-dat]]
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+
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+
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+## working principles
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+
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+该传感器模块对环境光线适应能力强，其具有一对红外线发射与接收管，发射管发射出一定频率的红外线，当检测方向遇到障碍物（反射面）时，红外线反射回来被接收管接收，经过比较器电路处理之后，绿色指示灯会亮起，同时信号输出接口输出数字信号（一个低电平信号），可通过电位器科比电子旋钮调节检测距离，有效距离范围2～30cm，工作电压为3.3V-5V。
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+
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+该传感器的探测距离可以通过电位器调节、具有干扰小、便于装配使用方便等特点，可以广泛应用于机器人避障、避障小车、流水线计数及黑白线循迹等众多场合。
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+
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+
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+## Applications
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+
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+* Meter pulse data sampling
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+* Paper shredder machine detection
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+* Obstacle detection
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+* Black and white line detection
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+
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+
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+
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+## IR TX RX pair module
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+
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+![](2023-11-20-14-14-00.png)
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+
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+![](2025-10-26-17-27-04.png)
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+
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+
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+
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+## ref
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+
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+- [[sensor-infrared-dat]]
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Tech-dat/Sensor-dat/sensor-Infrared-dat/sensor-Infrared-dat.md
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+
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+# Infrared-sensor-dat
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+
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+- [[sensor-IR-reflective-dat]]
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+
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+## Demo
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+
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+https://t.me/electrodragon3/192
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+
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+
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+
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+## ref
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+
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+- [[sensor-dat]]
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Tech-dat/Sensor-dat/sensor-photoelectric-dat/2025-10-26-17-34-55.png
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Tech-dat/Sensor-dat/sensor-photoelectric-dat/2025-10-26-17-36-34.png
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Tech-dat/Sensor-dat/sensor-photoelectric-dat/sensor-photoelectric-dat.md
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+
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+# sensor-photoelectric-dat
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+
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+
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+- [[sensor-IR-reflective-dat]] - [[sensor-infrared-dat]]
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+
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+- [[sensor-reflective-dat]]
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+
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+## common types
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+
11
+- Through-beam type（对射型）
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+- Retro-reflective type（反射板型）
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+- Diffuse reflective type（漫反射型）
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+
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+### Diffuse reflective type（漫反射型）
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+
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+![](2025-10-26-17-36-34.png)
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+
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+## U-type Slot-type photoelectric sensor
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+
21
+- common slot dimension 5 mm
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+
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+## working principles
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+
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+- Infrared (IR) sensor — detects reflected IR light
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+- Ultrasonic sensor — measures sound wave echoes
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+- LIDAR sensor — uses laser light to detect distance
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+- Radar sensor — uses radio waves
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+
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+## alternative names
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+
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+- Obstacle detection sensor
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+- Obstacle avoidance sensor
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+- Proximity sensor
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+- Distance sensor
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+- Object detection sensor
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+- Range sensor
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+
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+## common drive methods
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+
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+![](2025-10-26-17-32-23.png)
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+
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+![](2025-10-26-17-34-55.png)
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+
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+
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+NPN与PNP概念解读
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+
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+NPN:表示共正电压，输出负电压；
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+PNP:表示共负电压，输出正电压；
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+NPN NO:表示常态下是常开的，检测到物体时黑色线输出一个负电压信号
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+NPN NC:表示常态下黑色线是输出负电压信号，检测到物体时，断开输出信号
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+PNP NO:表示常态下时常开的，检测到物体时黑色线输出一个正电压信号
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+PNP NC:表示常态下黑色线是输出正电压信号，检测到物体时，断开输出信号
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+
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+
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+## DC NPN drive
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+
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+![](2025-10-26-17-24-07.png)
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+
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+
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+## DC ~24V PNP drive
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+
63
+![](2025-10-26-17-24-26.png)
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+
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+
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+
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+
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+
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+## ref
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+
71
+- [[sensor-dat]]
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Tech-dat/Sensor-dat/sensor-photoelectric-dat/sensor-reflective-dat/sensor-reflective-dat.md
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+
2
+# sensor-reflective-dat
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+
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+
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+
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+## ref
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+
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+- [[sensor-photoelectric-dat]]
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+
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+
app-dat/gun-dat/coilgun-dat/coilgun-dat.md
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@@ -6,6 +6,26 @@
6 6
- [[coil-dat]]
7 7
8 8
9
+## multiple stages coilgun design tips
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+
11
+1. try using some kind of **ferrite washer caps at the both wnds of each coil**, to help focusing the magnetic field.
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+
13
+2. the main issue and also misunderstanding about your design is that theoretically adding more stages to the design won't increase the speed.
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+
15
+- Here is why: as the bullet passes through the stages it gains more speed, thus the required run time of each coil will be different. the early stages need more run time thus bigger inductance and capacitor values, **and the few last stages will have a lot less run time due to the high speed of the bullet, so you should use smaller values of inductors and capacitors values.**
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+
17
+- If you apply the same values to each stage, adventually the last stages will reduce the speed and efficiency of the coilgun drastically, because of the suck back effect that they cause due to exceeding the required run time of the coil.
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+
19
+3. try to minimize the airgap between the bullet and the barrel, aslo use **non-conductive barrel** to get rid of induced current losses.
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+
21
+4. The pcb traces add a noticable amount of resistance to the current path, so using a thicker and wider trackes covered with solder is a better choice.
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+
23
+5. calculate the values for the capacitor and inductor of each stage based on the bullet speed of the previous stage.
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+
25
+6. try using a stepped coil geometry for the coil of the first stage.
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+
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+
28
+
9 29
## why a simple coil connected to DC power supply cannot launch an iron projectile
10 30
11 31
Directly connecting a coil to a DC power supply **does create a static magnetic field**, but this **will not launch** an iron projectile. Reasons: (1) a steady DC field **pulls the projectile into the coil and holds it**, rather than pushing it out; (2) launching requires **a short, large-current pulse plus precise timing (cut-off after the projectile passes the coil center)** and enough energy — an ordinary DC supply and simple coil cannot do that.