BOM-DAT/transistor-dat/2024-10-01-19-17-13.png
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BOM-DAT/transistor-dat/2024-10-01-19-17-24.png
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BOM-DAT/transistor-dat/transistor-dat.md
... ...
@@ -0,0 +1,19 @@
1
+
2
+# transistor-dat
3
+
4
+## common used
5
+
6
+### S8050
7
+
8
+- [[relay-dat]] drive
9
+
10
+| pin | name | common |
11
+| --- | --------- | -------- |
12
+| 1 | base | io input |
13
+| 2 | emittor | gnd |
14
+| 3 | collector | output |
15
+
16
+![](2024-10-01-19-17-13.png)
17
+
18
+
19
+![](2024-10-01-19-17-24.png)
... ...
\ No newline at end of file
Chip-dat/74xx-dat/74HC595-dat/74HC595-dat.md
... ...
@@ -36,8 +36,13 @@ optional
36 36
- When the output-enable (OE) input is high, the outputs are in the high-impedance state.
37 37
38 38
39
+## code
40
+
41
+- [[py-595-demo-1.py]] - [[py-595-demo-2.py]]
42
+
43
+
39 44
## ref
40 45
41
-- [[RPI-dat]]
46
+- [[RPI-dat]] - [[rpi-python-dat]]
42 47
43 48
- [[74HC595]]
... ...
\ No newline at end of file
Chip-dat/74xx-dat/74HC595-dat/py-595-demo-1.py
... ...
@@ -0,0 +1,73 @@
1
+import RPi.GPIO as gpio
2
+from time import sleep
3
+
4
+class Shifter():
5
+ inputA = 19
6
+ inputB = 23
7
+ clock = 21
8
+ clearPin = 22
9
+
10
+ def __init__(self):
11
+ self.setupBoard()
12
+ self.pause = 0
13
+
14
+ def tick(self):
15
+ gpio.output(self.clock, gpio.HIGH)
16
+ sleep(self.pause)
17
+ gpio.output(self.clock, gpio.LOW)
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+ sleep(self.pause)
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+
20
+ def setValue(self, value):
21
+ for i in range(24):
22
+ bitwise = 0x800000 >> i
23
+ bit = bitwise & value
24
+ if bit == 0:
25
+ gpio.output(self.inputB, gpio.LOW)
26
+ else:
27
+ gpio.output(self.inputB, gpio.HIGH)
28
+ self.tick() # Corrected method call
29
+
30
+ def clear(self):
31
+ gpio.output(self.clearPin, gpio.LOW)
32
+ self.tick() # Corrected method call
33
+ gpio.output(self.clearPin, gpio.HIGH)
34
+
35
+ def setupBoard(self):
36
+ # Uncomment if needed
37
+ # gpio.setup(self.inputA, gpio.OUT)
38
+ # gpio.output(self.inputA, gpio.HIGH)
39
+
40
+ gpio.setup(self.inputB, gpio.OUT)
41
+ gpio.output(self.inputB, gpio.LOW)
42
+
43
+ gpio.setup(self.clock, gpio.OUT)
44
+ gpio.output(self.clock, gpio.LOW)
45
+
46
+ gpio.setup(self.clearPin, gpio.OUT)
47
+ gpio.output(self.clearPin, gpio.HIGH)
48
+
49
+def main():
50
+ pause = 0.5
51
+ gpio.setmode(gpio.BOARD)
52
+ shifter = Shifter()
53
+ running = True
54
+
55
+ while running:
56
+ try:
57
+ # shifter.clear()
58
+ # shifter.setValue(1)
59
+ # sleep(1)
60
+ shifter.clear()
61
+ shifter.setValue(0x0AAAAAA)
62
+ sleep(pause)
63
+ shifter.clear()
64
+ shifter.setValue(0x0555555)
65
+ sleep(pause)
66
+
67
+ except KeyboardInterrupt:
68
+ running = False
69
+
70
+ gpio.cleanup() # Clean up GPIO pins on exit
71
+
72
+if __name__ == "__main__":
73
+ main()
Chip-dat/74xx-dat/74HC595-dat/py-595-demo-2.py
... ...
@@ -0,0 +1,42 @@
1
+
2
+from pi74HC595 import pi74HC595
3
+import RPi.GPIO as gpio
4
+from time import sleep
5
+
6
+gpio.setmode(gpio.BOARD)
7
+
8
+# ds sh st
9
+
10
+
11
+
12
+# shift_register.set_by_list([0, 1, 0, 1, 1, 1, 0, 0])
13
+
14
+
15
+def main():
16
+
17
+ pause = 0.5
18
+ gpio.setmode(gpio.BOARD)
19
+ # shifter = Shifter()
20
+ sh1 = pi74HC595(23, 22, 21, 2)
21
+ sh2 = pi74HC595(19, 18, 16, 2)
22
+
23
+ running = True
24
+
25
+ while running:
26
+ try:
27
+
28
+ sh1.set_by_list([0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0])
29
+ sh2.set_by_list([0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 0])
30
+
31
+ sleep(pause)
32
+
33
+ sh1.clear()
34
+ sh2.clear()
35
+
36
+ except KeyboardInterrupt:
37
+ running = False
38
+
39
+ gpio.cleanup() # Clean up GPIO pins on exit
40
+
41
+if __name__ == "__main__":
42
+ main()
Tech-dat/GPIO-dat/rpi-gpio-drive-dat/rpi-gpio-drive-dat.md
... ...
@@ -0,0 +1,3 @@
1
+
2
+# rpi-gpio-drive-dat
3
+
Tech-dat/GPIO-dat/rpi-gpio-drive-dat/rpi-gpio-drive-dat.py
... ...
@@ -0,0 +1,19 @@
1
+
2
+# rpi-gpio-drive-dat.py
3
+
4
+import RPi.GPIO as GPIO
5
+from time import sleep
6
+
7
+GPIO.setmode(GPIO.BOARD)
8
+GPIO.setup(29, GPIO.OUT) # set a port/pin as an output
9
+
10
+
11
+try:
12
+ while True:
13
+ GPIO.output(29, 1) # set GPIO24 to 1/GPIO.HIGH/True
14
+ sleep(2) # wait half a second
15
+ GPIO.output(29, 0) # set GPIO24 to 0/GPIO.LOW/False
16
+ sleep(2) # wait half a second
17
+
18
+except KeyboardInterrupt: # trap a CTRL+C keyboard interrupt
19
+ GPIO.cleanup() # resets all GPIO ports used by this program
... ...
\ No newline at end of file
Tech-dat/SBC-dat/RPI-dat/RPI-errors-dat/RPI-errors-dat.md
... ...
@@ -20,10 +20,11 @@ to
20 20
21 21
22 22
23
-- /etc/apt/sources.list.d/ 是存放额外软件源的目录。
23
+- /etc/apt/sources.list.d/raspi.list 是存放额外软件源的目录。
24 24
- /etc/apt/sources.list 是主要的系统软件源文件。
25 25
- /etc/sources.list.d/raspi.list 是与 Raspberry Pi 相关的软件源配置文件。
26 26
27
+
27 28
not working options
28 29
29 30
/etc/apt/sources.list.d/raspi.list
Tech-dat/SBC-dat/RPI-dat/RPI-python-dat/RPI-python-dat.md
... ...
@@ -6,4 +6,14 @@ apt-get install pip
6 6
Note, selecting 'python3-pip' instead of 'pip'
7 7
8 8
9
+
10
+## setup env
11
+
12
+ python3 -m venv .venv
13
+ source .venv/bin/activate
14
+
15
+ pip install RPi.GPIO
16
+
17
+
18
+
9 19
- [[python-dat]]
... ...
\ No newline at end of file
Tech-dat/SBC-dat/RPI-dat/RPI-setup-dat/RPI-setup-dat.md
... ...
@@ -89,4 +89,30 @@ Edit /etc/wpa_supplicant/wpa_supplicant.conf and add id_str="school" under the s
89 89
90 90
- libreoffice-common
91 91
- chromium
92
-- python2.7
... ...
\ No newline at end of file
0
+- python2.7
1
+
2
+## updates
3
+
4
+- check architectures armv7l or aarch64
5
+
6
+### sources list
7
+
8
+- /etc/apt/sources.list.d/raspi.list 是存放额外软件源的目录。
9
+- /etc/apt/sources.list 是主要的系统软件源文件。
10
+- /etc/sources.list.d/raspi.list 是与 Raspberry Pi 相关的软件源配置文件。
11
+
12
+
13
+
14
+### setup the CN GFW mirror updating sources
15
+
16
+首先通过 uname -m 确定你使用的系统的架构。
17
+
18
+编辑镜像站后，请使用sudo apt-get update命令，更新软件源列表，同时检查您的编辑是否正确。
19
+
20
+https://mirrors.tuna.tsinghua.edu.cn/help/raspbian/
21
+
22
+选择你的 Raspbian 对应的 Debian 版本 Debian 12 (bookworm)
23
+
24
+ deb https://mirrors.tuna.tsinghua.edu.cn/raspberrypi/ bookworm main
25
+
26
+- ref https://mirrors.tuna.tsinghua.edu.cn/help/raspberrypi/
... ...
\ No newline at end of file
Tech-dat/actuator-dat/relay-dat/2024-10-01-19-16-11.png
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Tech-dat/actuator-dat/relay-dat/relay-dat.md
... ...
@@ -21,10 +21,17 @@ HF32F-G-5-HS
21 21
22 22
## relay control schematic
23 23
24
-using N-mos mosfet control
24
+## using N-mos mosfet control
25 25
26 26
![](2024-09-18-17-41-35.png)
27 27
28
+## using NPN transistor drive
29
+
30
+![](2024-10-01-19-16-11.png)
31
+
32
+- [[transistor-dat]]
33
+
34
+
28 35
### fly back diode
29 36
30 37
A flyback diode (also known as a freewheeling diode or reverse protection diode) is used to protect a relay or other inductive loads. When the relay coil is de-energized, it generates a high voltage reverse current (called back EMF) due to its inductive nature. This reverse current can damage other components in the control circuit.