Board-dat/DOD/DOD1119-dat/DOD1119-dat.md
... ...
@@ -1,8 +1,13 @@
1 1
2
-# DOD1119-dat mini-toy-board-dat
2
+# DOD1119-dat
3
+
4
+
5
+mini-toy-board-dat
3 6
4 7
This board is a copy from a commerial toy product, so based on a real selling product, but used a more advanced [[RISC-V-dat]] chip
5 8
9
+
10
+
6 11
## Board map
7 12
8 13
![](2024-08-25-18-15-59.png)
Board-dat/NWI/NWI1249-dat/NWI1249-dat.md
... ...
@@ -20,6 +20,7 @@
20 20
21 21
![](2025-07-30-16-50-00.png)
22 22
23
+board left side
23 24
24 25
| touch | Pin Name | Function | Signal |
25 26
| ----- | -------- | --------- | ---------- |
... ...
@@ -44,6 +45,9 @@
44 45
| T14 | ADC2_CH3 | | GPIO14 |
45 46
| | | 5V | Power 5V |
46 47
48
+
49
+board right side
50
+
47 51
| singal | function | pin name | touch |
48 52
| ------ | -------- | -------- | ----- |
49 53
| GPIO43 | UOTXD | LED TX | |
... ...
@@ -115,6 +119,14 @@ esp32-s3 = {
115 119
116 120
![](2025-07-30-16-52-51.png)
117 121
122
+extension board V2
123
+
124
+- [[SX1308-dat]] - [[LCD-dat]] - [[TP4054-dat]]
125
+
126
+- [[I2S-dat]] - [[MAX98357-dat]]
127
+
128
+
129
+
118 130
## init debug boot log
119 131
120 132
mode:DIO, clock div:1
Board-new-dat/HV-module-dat/2025-10-08-15-19-42.png
... ...
Binary files /dev/null and b/Board-new-dat/HV-module-dat/2025-10-08-15-19-42.png differ
Board-new-dat/HV-module-dat/2025-10-08-15-20-14.png
... ...
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Board-new-dat/HV-module-dat/HV-module-dat.md
... ...
@@ -0,0 +1,61 @@
1
+# HV-module-dat
2
+
3
+- [[high-voltage-dat]]
4
+
5
+- High Voltage Boost Module
6
+
7
+
8
+## Module Function
9
+
10
+![](2025-10-08-15-19-42.png)
11
+
12
+dimension
13
+
14
+![](2025-10-08-15-20-14.png)
15
+
16
+## Module Info
17
+
18
+- Non-isolated Boost Converter
19
+
20
+### Input Specifications
21
+- **Input Voltage:** Two selectable ranges (set via PCB rear jumper, default is 10-32V)
22
+ 1. 8–16V (for 3S lithium batteries and 12V lead-acid batteries)
23
+ 2. 10–32V (for wide input voltage applications)
24
+- **Input Current:** Max 5A
25
+- **Quiescent Current:** 15mA (at 12V to 50V boost; increases with higher output voltage)
26
+
27
+### Output Specifications
28
+- **Output Voltage:**
29
+ 1. 45–390V continuously adjustable
30
+ 2. ±45–390V continuously adjustable (default ±50V; for other voltages, please specify when ordering)
31
+ - Module has voltage regulation; output voltage remains stable and does not change with input voltage.
32
+- **Output Current:** Max 0.2A (depends on input/output voltage difference; higher output voltage means lower output current)
33
+- **Output Power:** 40W (peak 70W)
34
+
35
+### Protection Features
36
+- **Short Circuit Protection:** Yes (10A input fuse; do not directly short output or draw arcs, as this may damage rectifier components. Use a power resistor in series for arc drawing.)
37
+- **Overcurrent Protection:** Yes (reduces output voltage if input current exceeds 4.5A)
38
+- **Overvoltage Protection:** Yes (reduces output voltage if output exceeds 410V)
39
+- **Reverse Polarity Protection:** Yes (non-self-resetting; reverse connection will blow the fuse, avoid reverse connection)
40
+
41
+### Other Specifications
42
+- **Operating Temperature:** -40°C to +85°C (enhance cooling if ambient temperature is high)
43
+- **Operating Frequency:** 75kHz
44
+- **Conversion Efficiency:** Up to 88% (depends on input/output voltage, current, and voltage difference)
45
+- **Mounting:** 4 × 3mm screws
46
+- **Wiring:** Terminal block for solderless output (soldered output if with enclosure)
47
+- **Module Dimensions:** 60mm (L) × 50mm (W) × 22mm (H)
48
+
49
+### Capacitor Charging Time (Measured Data)
50
+- 470μF to 390V: 2 seconds
51
+- 1000μF to 390V: 4 seconds
52
+- 2200μF to 390V: 8 seconds
53
+- 4700μF to 390V: 18 seconds
54
+
55
+### Important Safety Note
56
+> **Warning:** This module outputs high voltage, which is dangerous to humans and animals. Please take proper safety precautions during use. The seller is not responsible for any consequences resulting from improper use or handling of the module.
57
+
58
+
59
+## ref
60
+
61
+- [[tech-dat]]
... ...
\ No newline at end of file
Board-new-dat/RP2350-board-dat/RP2350-board-dat.md
... ...
@@ -1,4 +1,3 @@
1
-
2 1
# RP2350-board-dat
3 2
4 3
- [[RP2350-dat]]
... ...
@@ -9,4 +8,64 @@
9 8
10 9
## board map
11 10
12
-![](2025-10-08-14-20-58.png)
... ...
\ No newline at end of file
0
+![](2025-10-08-14-20-58.png)
1
+
2
+## RP2350A Board Specifications
3
+
4
+
5
+Main features include:
6
+
7
+- **Dual Cortex-M33 or Hazard3 processors, up to 150MHz**
8
+- 520KB multi-bank high-performance SRAM
9
+- Supports up to 16MB external flash via dedicated QSPI bus
10
+- DMA controller
11
+- Fully connected AHB crossbar switch
12
+- On-chip programmable LDO for core voltage generation
13
+- 2 on-chip PLLs for generating USB and core clocks
14
+- 30 GPIO pins, 4 of which can be used as analog inputs
15
+- 2 UARTs
16
+- 2 SPI controllers
17
+- 2 I2C controllers
18
+- 24 PWM channels
19
+- USB 1.1 controller and PHY, supporting host and device modes
20
+- 3 Programmable IO (PIO) blocks, with a total of 12 state machines
21
+
22
+
23
+
24
+
25
+| Parameter | Value / Description |
26
+| ----------------------- | ----------------------------------------------------------- |
27
+| Model | Pico2 |
28
+| Chip Model | RP2350A |
29
+| Core Architecture | Dual-core Cortex-M33 or RISC-V, Hazard3 processors |
30
+| Main Frequency | 150 MHz |
31
+| On-chip SRAM | 520 kB |
32
+| On-board QSPI Flash | Upgraded to 16 MB, with added RGB LED |
33
+| GPIO | 26 pins (3 can be used as ADC) |
34
+| Programmable IO (PIO) | 3 IO (PIO) blocks, 12 state machines total |
35
+| UART | 2 |
36
+| SPI Controllers | 2 |
37
+| I2C Controllers | 2 |
38
+| PWM Channels | 16 |
39
+| USB | 1× USB 1.1 controller and PHY, with host and device support |
40
+| USB Port Type | Type-C |
41
+| Power Supply | USB 5V, VSYS 1.8V–5.5V |
42
+| Supply Voltage | 5V |
43
+| Output Voltage | 5V / 3.3V |
44
+| GPIO Voltage | 3.3V |
45
+| Operating Current | ≤ 300 mA |
46
+| Pin Count | 40 |
47
+| ADC Resolution | 12-bit, 500 KSPS |
48
+| Operating Temperature | -20°C to 85°C |
49
+| Supported Languages | MicroPython, C, C++ |
50
+| Programming Method | Recognized as mass storage device, drag-and-drop upload |
51
+| Development Environment | Visual Studio Code, Eclipse |
52
+
53
+
54
+
55
+
56
+## ref
57
+
58
+- [[MCU-dat]]
59
+
60
+- [[peripherals-dat]]
... ...
\ No newline at end of file
Chip-cn-dat/TP-dat/TP4054-dat/2025-10-08-15-23-13.png
... ...
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Chip-cn-dat/TP-dat/TP4054-dat/TP4054-dat.md
... ...
@@ -1,8 +1,21 @@
1 1
2 2
# TP4054-dat
3 3
4
+
5
+## SCH 1 + 6206
6
+
7
+- [[LDO-dat]] - [[ME6206-dat]]
8
+
9
+
4 10
![](2025-07-09-18-40-16.png)
5 11
12
+
13
+## SCH 2
14
+
15
+![](2025-10-08-15-23-13.png)
16
+
17
+
18
+
6 19
## ref
7 20
8 21
- [[TP-dat]]
... ...
\ No newline at end of file
Chip-cn-dat/WCH-dat/CH32V003-dat/CH32V003-dat.md
... ...
@@ -3,7 +3,9 @@
3 3
4 4
- [[CH32V103-dat]]
5 5
6
+## board
6 7
8
+- [[DOD1119-dat]]
7 9
8 10
9 11
... ...
@@ -23,7 +25,9 @@
23 25
24 26
- SWIO = PD1 / PD4 / PD5
25 27
- 调试模式：串行单线调试接口
26
-- [[WCHLink-dat]] - [[SWIO-dat]] - [[MounRiver-dat]] - [[WCH-PROG-dat]]
28
+
29
+- [[WCH-sdk-dat]]
30
+
27 31
28 32
29 33
### Compile project
Chip-cn-dat/WCH-dat/WCH-MCU-dat/WCH-MCU-dat.md
... ...
@@ -9,13 +9,18 @@
9 9
10 10
- [[CH32V003-dat]] - [[CH32V103-dat]]
11 11
12
+- [[CH582-dat]]
13
+
14
+
15
+
16
+
12 17
13 18
开发工具：http://www.mounriver.com/
14 19
芯片资料：https://www.wch.cn/products/CH32V103.html
15 20
16 21
- [[CH579-dat]]
17 22
18
-- [[WCH-PROG-dat]] - [[WCH-SDK-dat]]
23
+- [[WCH-SDK-dat]]
19 24
20 25
21 26
## ref
Chip-cn-dat/chip-cn-dat.md
... ...
@@ -19,7 +19,7 @@
19 19
20 20
- [[quectel-dat]]
21 21
22
-- [[WCH-dat]] - [[CH55x-dat]] - [[CH582-dat]]
22
+- [[WCH-dat]] - [[WCH-MCU-dat]]
23 23
24 24
- [[LGT-dat]] - [[LGT8F328-DAT]]
25 25
Chip-cn-dat/goertek-dat/SPL06-001-dat.md
... ...
@@ -14,6 +14,15 @@ coefficients. The coefficients are used in the application to convert the measur
14 14
pressure and temperature values.
15 15
16 16
17
+
18
+[SPL06-MEMS-barometer-micropython](https://github.com/ChangboBro/SPL06-MEMS-barometer-micropython)
19
+
20
+The SPL06 is a high precision MEMS barometer, its resolution of altitude can up to 5cm! (but I think maybe +-10cm, still very good)
21
+
22
+
23
+
24
+
25
+
17 26
## SCH
18 27
19 28
![](2025-10-02-05-36-27.png)
... ...
\ No newline at end of file
Chip-cn-dat/microne-dat/me6206-dat/me6206-dat.md
... ...
@@ -1,6 +1,9 @@
1 1
2 2
# me6206-dat
3 3
4
+
5
+- [[TP4054-dat]]
6
+
4 7
available in 1.5V, 2.5V, 2.8V, 3.3V
5 8
6 9
SOT23-3, SOT89-3
Chip-cn-dat/suosemi-dat/SX1308-dat/2025-10-08-15-21-45.png
... ...
Binary files /dev/null and b/Chip-cn-dat/suosemi-dat/SX1308-dat/2025-10-08-15-21-45.png differ
Chip-cn-dat/suosemi-dat/SX1308-dat/SX1308-dat.md
... ...
@@ -14,7 +14,9 @@
14 14
15 15
![](2025-10-02-05-33-41.png)
16 16
17
+SCH2
17 18
19
+![](2025-10-08-15-21-45.png)
18 20
19 21
## ref
20 22
Chip-dat/Analog-device-dat/MAX98357-dat/2025-10-08-15-41-41.png
... ...
Binary files /dev/null and b/Chip-dat/Analog-device-dat/MAX98357-dat/2025-10-08-15-41-41.png differ
Chip-dat/Analog-device-dat/MAX98357-dat/2025-10-08-15-42-01.png
... ...
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Chip-dat/Analog-device-dat/MAX98357-dat/MAX98357-dat.md
... ...
@@ -12,6 +12,12 @@
12 12
- 05 Plug and play: only a single power supply is needed, 35 different clocks and 128 digital audio formats can be automatically configured
13 13
- 06 Suitable for microcontrollers or development board systems with I2S audio output such as RaspberryPi, ArduinoL and ESP32
14 14
15
+## footprint
16
+
17
+![](2025-10-08-15-42-01.png)
18
+
19
+- [[WLP-dat]] - [[QFN-dat]] - [[footprint-dat]]
20
+
15 21
16 22
## SCH
17 23
... ...
@@ -21,6 +27,11 @@
21 27
22 28
![](2025-07-10-18-22-52.png)
23 29
30
+chip footprint == - [[WLP-dat]]
31
+
32
+
33
+
34
+![](2025-10-08-15-41-41.png)
24 35
25 36
## Pins
26 37
Chip-dat/TI-dat/TI-dat.md
... ...
@@ -37,7 +37,7 @@
37 37
TPDxEUSB30 2-, 4-Channel ESD Protection for Super-Speed USB 3.0 Interface
38 38
39 39
40
-
40
+- [[voltage-reference-dat]]
41 41
42 42
43 43
Chip-dat/raspberry-pi-dat/RP2040-dat/RP2040-dat.md
... ...
@@ -7,7 +7,7 @@ RP2040 Pico介绍：
7 7
RP2040 Pico是一款低成本，高性能的微控制器开发板，具有灵活数字接口。硬件上，采用RaspberryPi官方自主研发的RP2040微控制器芯片，搭载了ARM Cortex MO+双核处理器，高达133MHz的运行频率，内置了264KB的SRAM和2MB的内存，还板载有多达26个多功能的GPIO引脚。软件上，可选择树莓派提供的C/C++SDK，或者使用MMicroPython进行开发，且配套有完善的开发资料教程，可方便快速入门开发，并嵌入应用到产品中。
8 8
9 9
10
-
10
+## board info for RP2040 board
11 11
12 12
- Dual-core Arm Cortex-M0+ processor, up to 133 MHz
13 13
- 264 KB on-chip SRAM
Chip-dat/raspberry-pi-dat/RP2350-dat/RP2350-dat.md
... ...
@@ -1,5 +1,12 @@
1 1
# RP2350-dat
2 2
3
+
4
+## board
5
+
6
+- [[RP2350-board-dat]]
7
+
8
+## info
9
+
3 10
[datasheet](https://datasheets.raspberrypi.com/rp2350/rp2350-datasheet.pdf)
4 11
5 12
... ...
@@ -25,22 +32,6 @@ RP2350 is a stateless device that supports execute-in-place (XIP) from external
25 32
26 33
RP2350 is manufactured using a modern 40nm process node, featuring high performance, low dynamic power consumption, and low leakage. It also offers multiple low-power modes to support long-term operation on battery power.
27 34
28
-Main features include:
29
-
30
-- **Dual Cortex-M33 or Hazard3 processors, up to 150MHz**
31
-- 520KB multi-bank high-performance SRAM
32
-- Supports up to 16MB external flash via dedicated QSPI bus
33
-- DMA controller
34
-- Fully connected AHB crossbar switch
35
-- On-chip programmable LDO for core voltage generation
36
-- 2 on-chip PLLs for generating USB and core clocks
37
-- 30 GPIO pins, 4 of which can be used as analog inputs
38
-- 2 UARTs
39
-- 2 SPI controllers
40
-- 2 I2C controllers
41
-- 24 PWM channels
42
-- USB 1.1 controller and PHY, supporting host and device modes
43
-- 3 Programmable IO (PIO) blocks, with a total of 12 state machines
44 35
45 36
Security:
46 37
PCB-dat/PCB-design-dat/footprint-dat/footprint-dat.md
... ...
@@ -9,6 +9,8 @@
9 9
10 10
- [[QFP-dat]] - [[SSOP-dat]] - [[SOP-dat]]
11 11
12
+- [[WLP-dat]] - [[QFN-dat]] == [[MAX98357-dat]]
13
+
12 14
- [[fab-PCBA-dat]]
13 15
14 16
## common footprint libraries
SDK-dat/WCH-SDK-dat/WCH-SDK-dat.md
... ...
@@ -1,12 +1,20 @@
1 1
2
-# WCH-sdk
2
+# WCH-sdk-dat
3 3
4
-- [[WCH-PROG-dat]] - [[mounriver-dat]]
5
-
6
-- [[CH32V003-dat]]
4
+- [[WCH-PROG-dat]]
7 5
8 6
- [[WCHlink-dat]]
9 7
8
+- [[SWIO-dat]]
9
+
10
+- [[MounRiver-dat]]
11
+
12
+
13
+## chips
14
+
15
+- [[CH32V003-dat]]
16
+
17
+- [[WCH-MCU-dat]]
10 18
11 19
12 20
## ref
Tech-dat/ADC-dat/ADC-dat.md
... ...
@@ -14,6 +14,12 @@
14 14
- AD7799
15 15
- AD7880 == LC2 MOS Single +5 V Supply, Low Power, 12-Bit Sampling ADC
16 16
17
+- [[ADS7822-dat]] - 12-Bit, 200 kSPS, SPI Interface, Micro Power, Single Supply, Rail-to-Rail I/O ADC with Internal Reference
18
+
19
+
20
+
21
+
22
+
17 23
## SCH
18 24
19 25
### ADC with measure MOSFET control
Tech-dat/Interface-dat/I2S-dat/2025-01-06-14-07-17.png
... ...
Binary files a/Tech-dat/Interface-dat/I2S-dat/2025-01-06-14-07-17.png and /dev/null differ
Tech-dat/Interface-dat/I2S-dat/2025-01-06-14-07-43.png
... ...
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Tech-dat/Interface-dat/I2S-dat/I2S-DAC-dat/2025-01-06-14-07-43.png
... ...
Binary files /dev/null and b/Tech-dat/Interface-dat/I2S-dat/I2S-DAC-dat/2025-01-06-14-07-43.png differ
Tech-dat/Interface-dat/I2S-dat/I2S-DAC-dat/I2S-DAC-dat.md
... ...
@@ -1,6 +1,9 @@
1 1
2 2
# I2S-DAC-dat
3 3
4
+
5
+- [[amplifier-dat]]
6
+
4 7
I2S DAC Decoder speaker
5 8
6 9
- [[PCM5122-dat]] - [[MPC1083-dat]]
... ...
@@ -11,6 +14,18 @@ I2S DAC Decoder speaker
11 14
12 15
- [[UDA1334-dat]] - [[AMP1013-dat]] - [[NXP-dat]]
13 16
17
+
18
+
19
+
20
+## Common Microphone, Speaker Wiring
21
+
22
+
23
+
24
+![](2025-01-06-14-07-43.png)
25
+
26
+
27
+
28
+
14 29
## Pin
15 30
16 31
| Name | default ESP32 | also Name | func | RPI GPIO | RPI pin |
Tech-dat/Interface-dat/I2S-dat/I2S-dat.md
... ...
@@ -1,6 +1,10 @@
1 1
2 2
# I2S-dat
3 3
4
+
5
+
6
+## info
7
+
4 8
An I2S (Interactive Two-Way Serial) interface is a type of serial communication protocol used for transferring data between devices.
5 9
6 10
It is commonly used in computer networking, as well as in audio processing and digital electronics.
... ...
@@ -11,27 +15,28 @@ One of the key features of I2S interfaces is their ability to support full-duple
11 15
12 16
This makes I2S a popular choice for high-speed data transfer applications.
13 17
14
-- [[I2S-microphone-dat]] - [[I2S-DAC-dat]]
15 18
16
-- [[everest-semi-dat]]
17 19
20
+## category
18 21
19
-## Common Microphone, Speaker Wiring
22
+- [[I2S-microphone-dat]]
20 23
21
-![](2025-01-06-14-07-17.png)
24
+- speaker == [[I2S-DAC-dat]]
22 25
26
+- [[sensor-dat]]
23 27
24 28
25
-![](2025-01-06-14-07-43.png)
26 29
30
+## chips
27 31
28
-## Other combine use with ESP32-S3
32
+- [[everest-semi-dat]]
29 33
30
-![](2025-01-06-17-07-16.png)
31 34
32 35
33 36
37
+## Other combine use with ESP32-S3
34 38
39
+![](2025-01-06-17-07-16.png)
35 40
36 41
37 42
... ...
@@ -65,11 +70,8 @@ https://github.com/miketeachman/micropython-i2s-examples
65 70
https://github.com/miketeachman/micropython-i2s-examples
66 71
67 72
68
-## I2S sesnors
69 73
70
-[SPL06-MEMS-barometer-micropython](https://github.com/ChangboBro/SPL06-MEMS-barometer-micropython)
71 74
72
-The SPL06 is a high precision MEMS barometer, its resolution of altitude can up to 5cm! (but I think maybe +-10cm, still very good)
73 75
74 76
## ref
75 77
... ...
@@ -90,9 +92,6 @@ audio amplifer - [[audio-dat]] - [[amplifier-dat]] - [[CS4344-dat]]
90 92
91 93
92 94
93
-
94
-## ref
95
-
96 95
https://en.wikipedia.org/wiki/I%C2%B2S
97 96
98 97
- [[I2S]]
Tech-dat/Interface-dat/I2S-dat/I2S-microphone-dat/2025-01-06-14-07-17.png
... ...
Binary files /dev/null and b/Tech-dat/Interface-dat/I2S-dat/I2S-microphone-dat/2025-01-06-14-07-17.png differ
Tech-dat/Interface-dat/I2S-dat/I2S-microphone-dat/I2S-microphone-dat.md
... ...
@@ -7,6 +7,18 @@ I2S Output Digital Microphone - [[INMP441-dat]] - [[MSM261S4030H0R-dat]]
7 7
8 8
- [[SPH0645-dat]]
9 9
10
+
11
+
12
+
13
+
14
+- [[INMP441-dat]]
15
+
16
+![](2025-01-06-14-07-17.png)
17
+
18
+
19
+
20
+
21
+
10 22
## Common pins
11 23
12 24
Tech-dat/MCU-dat/mcu-dat.md
... ...
@@ -11,10 +11,13 @@
11 11
12 12
- [[8051-dat]]
13 13
14
-- [[raspberry-pi-dat]]
14
+- [[raspberry-pi-dat]] - [[RP2350-dat]]
15 15
16 16
- [[allwinner-dat]]
17 17
18
+
19
+
20
+
18 21
## other types
19 22
20 23
- [[FPGA-dat]] - [[CPLD-dat]] - [[DSP-dat]] - [[ARM-dat]] - [[RISC-V-dat]]
Tech-dat/amplifier-dat/amplifier-dat.md
... ...
@@ -1,6 +1,8 @@
1 1
2 2
# amplifier-dat
3 3
4
+- [[I2S-daC-dat]]
5
+
4 6
5 7
6 8
## operational amplifiers (op-amps)
... ...
@@ -34,12 +36,20 @@
34 36
35 37
- [[OP07-dat]] - [[LM386-dat]]
36 38
37
-- [[MS6002-dat]] - [[LM358-DAT]] - [[NS4150-dat]] - [[MCP6002-dat]]
39
+- [[MS6002-dat]] - [[LM358-DAT]]
40
+
41
+- [[NS4150-dat]]
42
+
43
+- [[MCP6002-dat]]
38 44
39 45
- [[OPA1641-dat]] - [[NE5532-dat]] - [[AD828-dat]] - [[TL072-dat]]
40 46
41 47
- [[PAM-dat]] - [[diodes-dat]] - [[PAM8302-dat]]
42 48
49
+
50
+
51
+
52
+
43 53
## Voltage Reference
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45 55
LM258, LM358, LM358A, LM358E, LM2904, LM2904A, LM2904E, LM2904V, NCV2904
Tech-dat/high-voltage-dat/high-voltage-dat.md
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@@ -0,0 +1,14 @@
1
+
2
+# high-voltage-dat
3
+
4
+
5
+## apps
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+
7
+- [[coilgun-dat]]
8
+
9
+- [[nixie-tube-dat]]
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+
11
+
12
+
13
+## ref
14
+
Tech-dat/interactive-dat/display-dat/LCD-dat/2025-10-08-15-22-38.png
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Tech-dat/interactive-dat/display-dat/LCD-dat/LCD-dat.md
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@@ -73,6 +73,13 @@ LCD data 24-bit
73 73
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75 75
76
+## LCD ports
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+
78
+8-pin
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+
80
+![](2025-10-08-15-22-38.png)
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+
82
+
76 83
77 84
## ref
78 85
Tech-dat/peripherals-dat/peripherals-dat.md
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@@ -45,6 +45,9 @@
45 45
46 46
- [[led-driver-dat]]
47 47
48
+- [[voltage-reference-dat]]
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+
50
+
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49 52
## basic
50 53
Tech-dat/voltage-reference-dat/2025-10-08-14-52-29.png
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Tech-dat/voltage-reference-dat/voltage-reference-dat.md
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@@ -0,0 +1,36 @@
1
+
2
+# voltage-reference-dat
3
+
4
+== V_ref
5
+
6
+
7
+- [[TI-dat]]
8
+
9
+## REF30
10
+
11
+REF30E and REF30, Low Current Voltage Reference in SOT-23-3
12
+
13
+Output voltage options
14
+- REF30E: 1.25V to 5V
15
+- REF30: 1.25V to 4.096V
16
+
17
+
18
+![](2025-10-08-14-52-29.png)
19
+
20
+- [[ADC-dat]]
21
+
22
+
23
+
24
+
25
+- [[peripherals-dat]]
26
+
27
+## TL431
28
+
29
+
30
+
31
+
32
+## ref
33
+
34
+- [[tech-dat]]
35
+
36
+- [[voltage-reference]]
... ...
\ No newline at end of file
app-dat/nixie-tube-dat/2025-10-08-15-12-43.png
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app-dat/nixie-tube-dat/nixie-tube-dat.md
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@@ -0,0 +1,82 @@
1
+
2
+# nixie-tube-dat
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+
4
+![](2025-10-08-15-12-43.png)
5
+
6
+- [[VFD-dat]]
7
+
8
+
9
+A **Nixie tube** is an electronic display device that uses **cold cathode glow discharge** to show numbers or symbols. It was widely used in the 1950s–1970s for calculators, instruments, counters, and clocks — before LED and LCD displays became common.
10
+
11
+---
12
+
13
+## 🧩 Working Principle
14
+
15
+A Nixie tube is filled with a low-pressure inert gas (usually **neon**, sometimes with a little mercury or argon) and contains multiple **cathodes** shaped like numbers (0–9), plus a **common anode grid**.
16
+
17
+When a **high DC voltage** (typically around **170V**) is applied between the anode and one of the cathodes, the gas near that cathode becomes ionized and glows with an **orange-red discharge**, illuminating the selected number.
18
+
19
+---
20
+
21
+## ⚙️ Structure
22
+
23
+| Component | Description |
24
+|------------|--------------|
25
+| Glass envelope | Sealed tube, filled with inert gas |
26
+| Anode mesh | A grid at the front, controlling current flow |
27
+| Cathode digits | Metal wire shapes (0–9), stacked at different depths |
28
+| Gas filling | Usually neon (Ne) with traces of mercury or argon |
29
+| Pins | Electrical leads for circuit connection |
30
+
31
+---
32
+
33
+## ⚡ Electrical Characteristics
34
+
35
+| Parameter | Typical Value |
36
+|------------|----------------|
37
+| Ignition voltage | 150–180 V DC |
38
+| Maintaining voltage | 120–140 V DC |
39
+| Current per digit | 1–3 mA |
40
+| Light color | Orange-red (from neon glow) |
41
+
42
+---
43
+
44
+## 💡 Applications
45
+
46
+- Old digital instruments
47
+- Counters and frequency meters
48
+- **Nixie clocks** (retro electronic clocks)
49
+- Retro art and design projects
50
+
51
+---
52
+
53
+## 🕰️ History and Modern Revival
54
+
55
+- Commercialized by **Burroughs Corporation** in the 1950s.
56
+- Replaced by LED and LCD displays in the 1970s.
57
+- Revived in modern times for **vintage-style Nixie clocks** and electronic art.
58
+
59
+---
60
+
61
+## 🔬 Nixie Tube vs. Vacuum Fluorescent Display (VFD)
62
+
63
+| Feature | Nixie Tube | VFD |
64
+|----------|-------------|-----|
65
+| Light source | Gas discharge | Electron-excited phosphor |
66
+| Voltage | High (~170V) | Low (~30V) |
67
+| Color | Orange-red | Green or blue-green |
68
+| Drive type | Individual cathode control | Grid + cathode matrix |
69
+| Lifetime | Moderate (a few thousand hours) | Longer (tens of thousands of hours) |
70
+
71
+---
72
+
73
+## 🧠 Summary
74
+
75
+A **Nixie tube** is a **gas-discharge-based numeric display** famous for its warm, vintage orange glow.
76
+Though technologically obsolete, it remains popular among hobbyists and designers for its nostalgic beauty and craftsmanship.
77
+
78
+
79
+
80
+## ref
81
+
82
+- [[high-voltage-dat]]
... ...
\ No newline at end of file