Chip-cn-dat/3peak-dat/3peak-dat.md
... ...
@@ -6,4 +6,26 @@
6 6
datasheet TP5551 == [[Datasheet_TP5551-TP5552-TP5554.pdf]]
7 7
8 8
9
-- [[op-amp-dat]]
... ...
\ No newline at end of file
0
+- [[op-amp-dat]]
1
+
2
+- [[LDO-dat]]
3
+
4
+- [[TP5532-dat]] - [[3peak-dat]]
5
+
6
+## TPL810
7
+
8
+TPL810 == [[3peak]]
9
+
10
+https://www.3peak.com/hvldo/tpl810
11
+
12
+
13
+- [[battery-pack-dat]] -> [[AA-battery-holder-dat]]
14
+
15
+
16
+24-V Input, 180-mA Output High Voltage and Low Quiescent Current LDO
17
+
18
+The TPL810 is a series of high-performance and lowdropout linear regulators. The TPL810 series supports a maximum 24-V input voltage and 180-mA output current with a low quiescent current and high PSRR. The TPL810 series is stable with a 2.2-μF to 22-μF output capacitor, and a 4.7-μF ceramic capacitor is recommended.
19
+
20
+
21
+## ref
22
+
Chip-cn-dat/3peak-dat/TP5532-dat.md
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@@ -0,0 +1,29 @@
1
+
2
+# TP5532-dat
3
+
4
+- [[TP5532-dat]] - [[3peak-dat]]
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+
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+
7
+
8
+## TP5532
9
+
10
+The 3PEAK TP5531/5532/5534 is a series of low-power chopper-stabilized operational amplifiers that provide input offset voltage correction for low offset and offset drift over time and temperature.
11
+
12
+The series operates with a single supply voltage as low as 1.8 V, while drawing a quiescent current of 42 μA per amplifier with a gain bandwidth product of 350 kHz.
13
+
14
+The series is unity-gain stable, and has no 1/f noise.
15
+
16
+It also has a good power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR), and features the rail-to-rail input and output swing.
17
+
18
+## Features
19
+
20
+- • Low Offset Voltage: 10 μV (Max)
21
+- • Zero Drift: 0.008 μV/℃
22
+- • 0.1-Hz to 10-Hz Noise: 1.1 μVPP
23
+- • Low Supply Current: 42 μA per Amplifier
24
+- • Bandwidth: 350 kHz
25
+- • Slew Rate: 0.16 V/μs
26
+- • High-Gain, 130-dB High CMRR and PSRR
27
+- • Rail-to-Rail Input and Output Swing
28
+- • Operating Temperature Range: −40°C to 125°C
29
+- • Small Packages: SOT353 (SC70-5) and SOT23-5 (TP5531)
Chip-dat/TI-dat/TI-audio-dat/NE5532-dat/NE5532-dat.md
... ...
@@ -8,7 +8,7 @@
8 8
NE5532x, SA5532x Dual Low-Noise Operational Amplifiers
9 9
10 10
11
-
11
+![](2026-01-25-18-36-09.png)
12 12
13 13
## boards
14 14
... ...
@@ -31,6 +31,9 @@ the gain is 15K / 2.2K
31 31
![](2024-10-27-14-27-33.png)
32 32
33 33
34
+
35
+
36
+
34 37
## ref
35 38
36 39
- [[TI-dat]] - [[resistor-dat]]
... ...
\ No newline at end of file
Circuits-dat/protection-dat/battery-protection-dat/battery-protection-dat.md
... ...
@@ -28,4 +28,6 @@ OC OD mosfet control - to cut of BAT- to GND
28 28
29 29
## ref
30 30
31
+- [[battery-protection]] - [[battery]]
32
+
31 33
- [[protection-dat]] - [[power-protection-dat]]
... ...
\ No newline at end of file
Tech-dat/amplifier-dat/op-amp-dat/op-amp-dat.md
... ...
@@ -40,6 +40,7 @@ OP27 - Low Noise, Precision Operational Amplifier
40 40
41 41
LM6142 - Series Operational Amplifiers - Op Amps
42 42
43
+- [[3peak-dat]]
43 44
44 45
## ref
45 46
app-dat/home-plant-dat/full-spetrum-light-dat/full-spectrum-light-dat.md
... ...
@@ -0,0 +1,31 @@
1
+
2
+# full-spetrum-light-dat
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+
4
+
5
+
6
+- [[home-plant-dat]] - [[full-spectrum-light-dat]] - [[ph-tester-dat]]
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+
8
+
9
+
10
+# Why Do Plants Need Full-Spectrum Light?
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+
12
+Plants need **full-spectrum light** for growth because it closely mimics natural sunlight, providing the essential wavelengths required for **photosynthesis and healthy development**. Here’s why full-spectrum light is important for plants:
13
+
14
+## 1. Covers All Necessary Wavelengths
15
+- **Blue Light (400–500 nm)** → Stimulates vegetative growth, strong leaves, and root development.
16
+- **Red Light (600–700 nm)** → Promotes flowering and fruiting.
17
+- **Green Light (500–600 nm)** → Helps penetrate deeper into leaves for balanced growth.
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+- **UV Light (Below 400 nm)** → Enhances plant defense mechanisms and improves color and flavor in some plants.
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+- **Infrared (Above 700 nm)** → Encourages stretching and flowering.
20
+
21
+## 2. Mimics Natural Sunlight
22
+- Since the sun provides a full spectrum of light, plants evolved to use all its wavelengths.
23
+- Standard bulbs (like warm white LEDs or fluorescents) lack certain wavelengths, leading to weak or unbalanced growth.
24
+
25
+## 3. Supports Different Growth Stages
26
+- **Seedlings & Vegetative Stage** → Needs more **blue light** for strong leaves and stems.
27
+- **Flowering & Fruiting Stage** → Requires more **red and infrared light** to stimulate blooms and fruit development.
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+
29
+## 4. Improves Plant Health & Yield
30
+- A proper full-spectrum light helps plants grow **faster, healthier, and with better yields** compared to limited-spectrum lighting.
31
+- Some plants, like leafy greens, grow well under **blue-dominant light**, while fruiting plants (like tomatoes) need **more red light**.
app-dat/home-plant-dat/full-spetrum-light-dat/full-spetrum-light-dat.md
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@@ -1,25 +0,0 @@
1
-
2
-# full-spetrum-light-dat
3
-
4
-# Why Do Plants Need Full-Spectrum Light?
5
-
6
-Plants need **full-spectrum light** for growth because it closely mimics natural sunlight, providing the essential wavelengths required for **photosynthesis and healthy development**. Here’s why full-spectrum light is important for plants:
7
-
8
-## 1. Covers All Necessary Wavelengths
9
-- **Blue Light (400–500 nm)** → Stimulates vegetative growth, strong leaves, and root development.
10
-- **Red Light (600–700 nm)** → Promotes flowering and fruiting.
11
-- **Green Light (500–600 nm)** → Helps penetrate deeper into leaves for balanced growth.
12
-- **UV Light (Below 400 nm)** → Enhances plant defense mechanisms and improves color and flavor in some plants.
13
-- **Infrared (Above 700 nm)** → Encourages stretching and flowering.
14
-
15
-## 2. Mimics Natural Sunlight
16
-- Since the sun provides a full spectrum of light, plants evolved to use all its wavelengths.
17
-- Standard bulbs (like warm white LEDs or fluorescents) lack certain wavelengths, leading to weak or unbalanced growth.
18
-
19
-## 3. Supports Different Growth Stages
20
-- **Seedlings & Vegetative Stage** → Needs more **blue light** for strong leaves and stems.
21
-- **Flowering & Fruiting Stage** → Requires more **red and infrared light** to stimulate blooms and fruit development.
22
-
23
-## 4. Improves Plant Health & Yield
24
-- A proper full-spectrum light helps plants grow **faster, healthier, and with better yields** compared to limited-spectrum lighting.
25
-- Some plants, like leafy greens, grow well under **blue-dominant light**, while fruiting plants (like tomatoes) need **more red light**.
app-dat/home-plant-dat/home-plant-dat.md
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@@ -14,6 +14,8 @@
14 14
15 15
## system
16 16
17
+- [[home-plant-dat]] - [[full-spectrum-light-dat]] - [[ph-tester-dat]]
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+
17 19
### Temperature and Humidity
18 20
19 21
Humidity Tray: Place a shallow tray of water with some pebbles or stones in the growing area.
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@@ -55,7 +57,7 @@ The term "fresh air" for plants, in a technical sense, generally refers to an op
55 57
56 58
- timing relay - [[mcu-relay]]
57 59
58
-### light
60
+##[[full-spectrum-light-dat]]
59 61
60 62
- [[full-spetrum-light-dat]]
61 63
app-dat/home-plant-dat/ph-tester-dat/2026-01-25-18-25-51.png
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Binary files /dev/null and b/app-dat/home-plant-dat/ph-tester-dat/2026-01-25-18-25-51.png differ
app-dat/home-plant-dat/ph-tester-dat/2026-01-25-18-26-02.png
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Binary files /dev/null and b/app-dat/home-plant-dat/ph-tester-dat/2026-01-25-18-26-02.png differ
app-dat/home-plant-dat/ph-tester-dat/ph-tester-dat.md
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@@ -0,0 +1,68 @@
1
+
2
+# ph-tester-dat
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+
4
+- [[home-plant-dat]] - [[full-spectrum-light-dat]] - [[ph-tester-dat]]
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+
6
+
7
+## apps
8
+
9
+![](2026-01-25-18-25-51.png)
10
+
11
+
12
+- [[display-dat]] and [[mcu-dat]] == [[stm8-dat]]
13
+
14
+- [[power-dat]] - [[LDO-dat]] - [[3peak-dat]]
15
+
16
+- [[OP-amp-dat]]
17
+
18
+![](2026-01-25-18-26-02.png)
19
+
20
+[[OP-amp-dat]] for [[ph-tester-dat]]
21
+
22
+
23
+## What kind of op-amp IS required?
24
+
25
+You need an **electrometer-grade or FET-input op-amp**.
26
+
27
+### Suitable op-amps for pH measurement
28
+
29
+| Op-amp | Input bias current |
30
+| ------------- | --------------------- |
31
+| [[LMP7721-dat]] | 3 fA |
32
+| [[LMC6001-dat]] | 25 fA |
33
+| [[TL072-dat]] / [[TL082-dat]] | ~65 pA *(borderline)* |
34
+| [[OPA129-dat]] | 75 fA |
35
+| [[AD8605-dat]] | 1 pA |
36
+
37
+> **Rule of thumb:**
38
+> Input bias current should be **< 1/1000 of electrode current**
39
+
40
+---
41
+
42
+Typical pH front-end architecture
43
+
44
+ pH electrode
45
+ │
46
+ │ (very high impedance)
47
+ ▼
48
+ [ FET-input buffer ]
49
+ │
50
+ ├─ Gain & offset
51
+ │
52
+ ├─ Temperature compensation
53
+ │
54
+ ▼
55
+ ADC / MCU
56
+
57
+- First stage must be **unity-gain buffer**
58
+- Guard rings + clean PCB required
59
+- Shielded cable mandatory
60
+
61
+### Ibias
62
+
63
+- Ibias ≤ 1 pA → good pH front end
64
+- Ibias 1–10 pA → acceptable with care
65
+- Ibias 10–50 pA → hobby / lab demo only
66
+- Ibias >50 pA → no
67
+
68
+
battery-dat/battery-holder-dat/AA-battery-holder-dat/AA-battery-holder-dat.md
... ...
@@ -1,6 +1,10 @@
1 1
2 2
# AA-battery-holder-dat
3 3
4
+- [[battery-holder-dat]] - [[18650-battery-holder-dat]] - [[AA-battery-holder-dat]]
5
+
6
+- [[battery-pack-dat]] - [[battery-pack-kit-dat]]
7
+
4 8
5 9
6 10
## 3X AA battery holder
battery-dat/battery-pack-dat/battery-pack-dat.md
... ...
@@ -1,6 +1,14 @@
1 1
2 2
# battery-pack-dat
3 3
4
+
5
+
6
+- [[battery-holder-dat]] - [[18650-battery-holder-dat]] - [[AA-battery-holder-dat]]
7
+
8
+- [[battery-pack-dat]] - [[battery-pack-kit-dat]]
9
+
10
+
11
+
4 12
- in the pack including [[BMS-dat]]
5 13
6 14
power-dat/LDO-dat/LDO-dat.md
... ...
@@ -9,6 +9,8 @@
9 9
10 10
- [[LDO-3CH-dat]]
11 11
12
+
13
+
12 14
## comparable table
13 15
14 16
... ...
@@ -98,10 +100,15 @@ SOT23-5
98 100
99 101
HMC860LP3E - QUAD LOW NOISE HIGH PSRR LINEAR VOLTAGE REGULATOR
100 102
101
-## others
102 103
103 104
104 105
106
+
107
+
108
+## others unsort
109
+
110
+- [[3peak-dat]]
111
+
105 112
MC7824BD2TG == Linear Voltage Regulators 24V 1A Positive
106 113
107 114
Nisshinbo Micro Devices Inc. **NJM78L05UA-TE2** == Fixed Positive Standard Regulator, 5VBIPolar, PSSO3, MINI, PLASTIC, SOT-89, 3 PIN