CONN-DAT/CONN-dat.md
... ...
@@ -1,7 +1,7 @@
1 1
2 2
# Conn-dat
3 3
4
-- [[CONN-dat]] - [[cable-dat]]
4
+- [[CONN-dat]] - [[cable-dat]] - [[pitch-dat]]
5 5
6 6
- [[conn-cable-terminal-dat]]
7 7
CONN-DAT/CONN-power-dat/CONN-power-dat.md
... ...
@@ -40,6 +40,6 @@ MR/MT/XT30/60/90/150 Lithium Battery Controller Motor Charger Power Connector AM
40 40
41 41
## ref
42 42
43
-- [[CONN-dat]]
43
+- [[CONN-dat]] - [[pitch-dat]]
44 44
45 45
- [[conn-power]] - [[conn]]
... ...
\ No newline at end of file
Chip-cn-dat/youwang-dat/2026-05-28-12-14-53.png
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Chip-cn-dat/youwang-dat/youwang-dat.md
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1
+
2
+
3
+# youwang-dat
4
+
5
+
6
+`UTC2411` LINEAR INTEGRATED CIRCUIT - [[LDO-dat]]
7
+
8
+![](2026-05-28-12-14-53.png)
9
+
10
+
Chip-dat/mosart-dat/MA6162-dat/2026-05-28-12-11-07.png
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Chip-dat/mosart-dat/MA6162-dat/MA6162-dat.md
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1
+
2
+
3
+# MA6162-dat
4
+
5
+- [[mosart-dat]] - [[MA6162-dat]]
6
+
7
+- [[MC3361-dat]]
8
+
9
+1. General Description
10
+
11
+MA6162 USB-PS/2 Wireless Mouse Receiver IC
12
+
13
+MA6162 is a wireless mouse receiver control IC. It operates using RF at a frequency of 27
14
+MHZ, single channel.
15
+
16
+MA60H09, MA6121, MA6231 and MA6221 can be the transmitter.
17
+
18
+MA6162 (packaged with SOP-16, 150mil) can be configured as USB or PS/2 mode. It's
19
+auto-detected. It can receive command and echo status or data format which are compatible with
20
+PS/2 mode or USB mode.
21
+
22
+1. Features
23
+
24
+- USB-PS/2 Auto-Detection Circuit.
25
+- 5V -> 3.3V Regulator.
26
+- 120KHz Ring Oscillator.
27
+- Compatible with PS/2 protocol.
28
+- Conforms to USB 1.5 Mbps Specification, Version 1.1.
29
+- Supports 1 device address and 2 endpoints (1 control endpoint and 1 interrupt endpoint).
30
+- Integrated USB transceiver.
31
+- Built-in 1.5Kohm D- pull-high resistor.
32
+- 6MHz clock rate (76.8KHz clock rate in PS/2 and air interface).
33
+- Compatible with Microsoft scrolling and 5B mouse.
34
+- Build-in error detection circuit (one way).
35
+- Baud Rate: 4800 bps in air or 4096 bps as in optical mouse mode.
36
+
37
+
38
+![](2026-05-28-12-11-07.png)
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Chip-dat/mosart-dat/mosart-dat.md
... ...
@@ -0,0 +1,5 @@
1
+
2
+
3
+# mosart-dat
4
+
5
+- [[mosart-dat]] - [[MA6162-dat]]
... ...
\ No newline at end of file
Chip-dat/unisonic-dat/MC3361-dat/2026-05-28-12-04-23.png
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Chip-dat/unisonic-dat/MC3361-dat/2026-05-28-12-08-09.png
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Chip-dat/unisonic-dat/MC3361-dat/MC3361-dat.md
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@@ -0,0 +1,52 @@
1
+
2
+
3
+# MC3361-dat
4
+
5
+DESCRIPTION
6
+
7
+The UTC MC3361BP is designed for use in FM dual conversion communication. It contains a complete narrow band FM demodulation system operable to less than 2.5V supply voltage. This low-power narrow-band FM IF system provides the second converter, second IF, demodulator. Filter Amp and squelch circuitry for communications and scanning receivers.
8
+
9
+FEATURES
10
+
11
+- * Low power consumption (4.0mA typ. at Vcc=4.0V)
12
+- * Excellent input sensitivity (-3dB limiting, 2.0mVrms typ.)
13
+- * Minimum number of external components required.
14
+- * Operating Voltage:2.5~7.0V
15
+
16
+APPLICATIONS
17
+
18
+- *Cordless phone (for home use)
19
+- *FM dual conversion communications equipment
20
+
21
+
22
+## application and SCH
23
+
24
+![](2026-05-28-12-04-23.png)
25
+
26
+
27
+
28
+![](2026-05-28-12-07-14.png)
29
+
30
+一款替代富士通MB15E03SL单通道频率合成器，工作频率可达1.2GHz， 工作电压范围2.2V-5.5V。包括一个双模前置分频器. RF分频器 64/65 or 128/129，一个可编程参考频率分频器 （R counter），一个可编程反馈频率分频器 （N counter）， 一个鉴相器， 一个电流可调电荷泵，LDO电压调制器， 以及3线串行接口（DATA, CLK, EN）。
31
+
32
+本芯片与一个外置压控振荡器（VCO）和一个无源滤波器形成环路。通过3线串行接口配置参考频率分频器和反馈频率分频器的分频数，可以得到所需要的频率。
33
+
34
+本芯片采用的是 0.35um CMOS制作工艺，封装形式为TSSOP-16。可以应用到无绳电话，无线Ｕ段麦克风，无线音响，无线耳机，手机，无线网络（WLAN)，无线通讯（PCS/PCN），有线电视调制器（Cable TV Tuner)，以及其他无线遥控与通讯系统等。
35
+
36
+Low Power Narrowband FM IF
37
+
38
+The MC3361C includes an Oscillator, Mixer, Limiting Amplifier, Quadrature Discriminator, Active Filter, Squelch, Scan Control and Mute Switch. This device is designed for use in FM dual conversion communications equipment.
39
+
40
+- Operates from 2.0 to 8.0 V Supply
41
+- Low Drain Current 2.8 mA Typical @ VCC = 4.0 Vdc
42
+- Excellent Sensitivity: Input Limiting Voltage -
43
+- - 3.0 dB = 2.6 µV Typical
44
+- Low Number of External Parts Required
45
+- Operating Frequency Up to 60 MHz
46
+- Full ESD Protection
47
+
48
+![](2026-05-28-12-07-00.png)
49
+
50
+- [[MA6162-dat]] - [[93C46-B-dat]]
51
+
52
+![](2026-05-28-12-08-09.png)
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\ No newline at end of file
Chip-dat/unisonic-dat/unisonic-dat.md
... ...
@@ -0,0 +1,11 @@
1
+
2
+
3
+# unisonic-dat
4
+
5
+- [[youwang-dat]] - [[unisonic-dat]] - [[MC3361-dat]] - [[RC-boat-dat]]
6
+
7
+- [[power-tools-dat]] - https://www.unisonic.com.tw/uploadfiles/836/Applications/power-tool.pdf
8
+
9
+- [[triac-dat]] - UTC BT131
10
+
11
+
Network-dat/frequency-dat/27mhz-dat/27mhz-dat.md
... ...
@@ -0,0 +1,47 @@
1
+
2
+
3
+# 27mhz-dat
4
+
5
+- [[27mhz-dat]] - [[frequency-dat]] - [[frequency-rc-dat]]
6
+
7
+The use of the 27 MHz frequency in RC boats comes down to two main factors: **the physics of how radio waves interact with water** and **manufacturing costs**.
8
+
9
+While modern hobby-grade RC cars and drones have almost entirely moved to the 2.4 GHz band, water presents a unique physical barrier that makes the older, lower 27 MHz frequency highly advantageous for boats and submarines.
10
+
11
+---
12
+
13
+## The Physics of Water and Radio Waves
14
+
15
+Radio waves are electromagnetic radiation, and their frequency dictates their wavelength.
16
+* **27 MHz** has a very long wavelength of about **11 meters**.
17
+* **2.4 GHz** (used in modern Wi-Fi and most drones) has a very short wavelength of about **12.5 centimeters**.
18
+
19
+Water—especially conductive water with impurities—is excellent at absorbing and reflecting high-frequency radio waves. In fact, 2.4 GHz is the exact same frequency your microwave oven uses to heat the water molecules in your food.
20
+
21
+Because of this, 2.4 GHz signals cannot penetrate water effectively. If a 2.4 GHz wave hits the surface of a lake, it largely bounces off or gets instantly absorbed. If an RC boat using 2.4 GHz takes on a heavy splash, flips over, or dips its receiver antenna below the water line, the signal drops to zero immediately.
22
+
23
+The much longer waves of 27 MHz can easily "punch through" water splashes and wave crests. More importantly, 27 MHz can actually penetrate several feet of fresh water. For RC submarines, lower frequencies (like 27 MHz, 40 MHz, or 75 MHz) are strictly mandatory, as a 2.4 GHz signal will fail if the submarine dives more than an inch below the surface.
24
+
25
+> **Key insight:** The longer the wavelength, the better it ignores small obstacles like water droplets and wave crests.
26
+
27
+---
28
+
29
+## Cost and Legacy
30
+
31
+Beyond physics, 27 MHz is heavily used in "toy-grade" RC boats for economic reasons:
32
+
33
+1. **Unlicensed Band:** 27 MHz is part of the ISM (Industrial, Scientific, and Medical) and Citizen's Band (CB) spectrum. It has been free for consumer use globally for decades.
34
+2. **Extremely Cheap Electronics:** The basic analog AM or FM crystal components required to build a 27 MHz transmitter and receiver cost literal pennies to manufacture.
35
+3. **Simplicity:** Toy manufacturers already have massive supply chains built around 27 MHz boards, making it the easiest plug-and-play solution for cheap aquatic toys.
36
+
37
+## 27 MHz vs. 2.4 GHz in RC Boats
38
+
39
+| Feature | 27 MHz | 2.4 GHz |
40
+| :-------------------- | :--------------------------------------- | :--------------------------------- |
41
+| **Water Penetration** | Excellent (can reach submarines) | Non-existent (bounces or absorbs) |
42
+| **Splash Resistance** | Unaffected by surface splashes | Splashes can cause signal drops |
43
+| **Antenna Length** | Requires a long, external wire | Very short (often hidden inside) |
44
+| **Interference** | High (easy to cross signals with others) | Zero (digitally bound to receiver) |
45
+| **Response Time** | Noticeable analog lag | Instant digital response |
46
+
47
+Today, high-end hobby RC boats actually *do* use 2.4 GHz, but they require a specific design workaround: the receiver antenna must be routed through a plastic tube that sticks straight up, ensuring the tip remains strictly above the water line at all times.
... ...
\ No newline at end of file
Network-dat/frequency-dat/frequency-dat.md
... ...
@@ -5,7 +5,7 @@
5 5
- [[VSWR-dat]] - [[bands-dat]] - [[frequency-dat]]
6 6
7 7
8
-
8
+- [[27mhz-dat]] - [[frequency-dat]] - [[frequency-rc-dat]]
9 9
10 10
- [[antenna-dat]] - [[antenna-spring-dat]]
11 11
... ...
@@ -14,6 +14,9 @@
14 14
15 15
## common frequency
16 16
17
+- [[27mhz-dat]]
18
+
19
+
17 20
- 315 - [[RF-dat]]
18 21
- 868 915 == [[lora-dat]] - [[CDMA-dat]] - [[RFID-dat]]
19 22
- 433 - [[lora-dat]] - [[RF-dat]]
Network-dat/frequency-dat/frequency-rc-dat/frequency-rc-dat.md
... ...
@@ -0,0 +1,148 @@
1
+
2
+
3
+# frequency-rc-dat
4
+
5
+- [[27mhz-dat]] - [[frequency-dat]] - [[frequency-rc-dat]]
6
+
7
+## 27 MHz
8
+
9
+The 27 MHz band is legal in most, if not all, countries for use with all types of RCs. Subject to interference from adjacent CB Operation. Note:cheap toys seem to usually use Channel 4 if there is no channel stated.
10
+
11
+- 26.995 MHz -- Channel 1 -- Brown
12
+- 27.045 MHz -- Channel 2 -- Red
13
+- 27.095 MHz -- Channel 3 -- Orange
14
+- 27.145 MHz -- Channel 4 -- Yellow
15
+- 27.195 MHz -- Channel 5 -- Green
16
+- 27.255 MHz -- Channel 6 -- Blue - Shared with CB Radio Service, never an "exclusive" channel
17
+
18
+## 49 MHz
19
+
20
+Used in some cheap toy R/C, there are at least 6 channels here too. (Need help here.) Not recommended for control of model aircraft due to limited range. Transmitter power limited to 100 Milliwatts.
21
+
22
+- 49.830 Mhz -- Channel 1
23
+- 49.845 Mhz -- Channel 2
24
+- 49.860 Mhz -- Channel 3
25
+- 49.875 Mhz -- Channel 4
26
+- 49.890 Mhz -- Channel 5
27
+
28
+## 50 MHz
29
+
30
+The 50 MHz band is legal for all types of models in the US and Canada, for operators with an amateur radio license. For some reason, Channel 09 is not listed as safely usable in Canada, according to the MAAC's listings.
31
+
32
+- 50.800 MHz -- Channel RC00
33
+- 50.820 MHz -- Channel RC01
34
+- 50.840 MHz -- Channel RC02
35
+- 50.860 MHz -- Channel RC03
36
+- 50.880 MHz -- Channel RC04
37
+- 50.900 MHz -- Channel RC05
38
+- 50.920 MHz -- Channel RC06
39
+- 50.940 MHz -- Channel RC07
40
+- 50.960 MHz -- Channel RC08
41
+- 50.980 MHz -- Channel RC09 (not listed for use in Canada)
42
+
43
+## 53 MHz
44
+
45
+53 MHz is another amateur radio band for all types of models in the US and Canada. It is no longer in use for RC flying models, as high powered repeaters are now operating on this band in the United States, with very few, if any six-meter repeaters in use within Canada. Ground-based RC model operation on 53 MHz should still be relatively interference-free, however.
46
+
47
+- 53.100 MHz -- Black-Brown
48
+- 53.200 MHz -- Black-Red
49
+- 53.300 MHz -- Black-Orange
50
+- 53.400 MHz -- Black-Yellow
51
+- 53.500 MHz -- Black-Green
52
+- 53.600 MHz -- Black-Blue
53
+- 53.700 MHz -- Black-Violet
54
+- 53.800 MHz -- Black-Gray
55
+
56
+## 72 MHz
57
+
58
+The 72 MHz band is for aircraft use only. Country information is not currently available, other then that it is legal in the US and Canada, with various nations also using either the entire band (as Argentina is said to do) or parts of it (as France does for channels 21 through 35, and Japan with two bands using channels 17 through 21 and channels 50 through 54) as examples.
59
+
60
+- 72.010 MHz -- Channel 11
61
+- 72.030 MHz -- Channel 12
62
+- 72.050 MHz -- Channel 13
63
+- 72.070 MHz -- Channel 14
64
+- 72.090 MHz -- Channel 15
65
+- 72.110 MHz -- Channel 16
66
+- 72.130 MHz -- Channel 17
67
+- 72.150 MHz -- Channel 18
68
+- 72.170 MHz -- Channel 19
69
+- 72.190 MHz -- Channel 20
70
+- 72.210 MHz -- Channel 21
71
+- 72.230 MHz -- Channel 22
72
+- 72.250 MHz -- Channel 23
73
+- 72.270 MHz -- Channel 24
74
+- 72.290 MHz -- Channel 25
75
+- 72.310 MHz -- Channel 26
76
+- 72.330 MHz -- Channel 27
77
+- 72.350 MHz -- Channel 28
78
+- 72.370 MHz -- Channel 29
79
+- 72.390 MHz -- Channel 30
80
+- 72.410 MHz -- Channel 31
81
+- 72.430 MHz -- Channel 32
82
+- 72.450 MHz -- Channel 33
83
+- 72.470 MHz -- Channel 34
84
+- 72.490 MHz -- Channel 35
85
+- 72.510 MHz -- Channel 36
86
+- 72.530 MHz -- Channel 37
87
+- 72.550 MHz -- Channel 38
88
+- 72.570 MHz -- Channel 39
89
+- 72.590 MHz -- Channel 40
90
+- 72.610 MHz -- Channel 41
91
+- 72.630 MHz -- Channel 42
92
+- 72.650 MHz -- Channel 43
93
+- 72.670 MHz -- Channel 44
94
+- 72.690 MHz -- Channel 45
95
+- 72.710 MHz -- Channel 46
96
+- 72.730 MHz -- Channel 47
97
+- 72.750 MHz -- Channel 48
98
+- 72.770 MHz -- Channel 49
99
+- 72.790 MHz -- Channel 50
100
+- 72.810 MHz -- Channel 51
101
+- 72.830 MHz -- Channel 52
102
+- 72.850 MHz -- Channel 53
103
+- 72.870 MHz -- Channel 54
104
+- 72.890 MHz -- Channel 55
105
+- 72.910 MHz -- Channel 56
106
+- 72.930 MHz -- Channel 57
107
+- 72.950 MHz -- Channel 58
108
+- 72.970 MHz -- Channel 59
109
+- 72.990 MHz -- Channel 60
110
+
111
+## 75 MHz
112
+
113
+75 MHz is a surface model band in the US.
114
+
115
+- 75.410 MHz --- Channel 61
116
+- 75.430 MHz --- Channel 62
117
+- 75.450 MHz --- Channel 63
118
+- 75.470 MHz --- Channel 64
119
+- 75.490 MHz --- Channel 65
120
+- 75.510 MHz --- Channel 66
121
+- 75.530 MHz --- Channel 67
122
+- 75.550 MHz --- Channel 68
123
+- 75.570 MHz --- Channel 69
124
+- 75.590 MHz --- Channel 70
125
+- 75.610 MHz --- Channel 71
126
+- 75.630 MHz --- Channel 72
127
+- 75.650 MHz --- Channel 73
128
+- 75.670 MHz --- Channel 74
129
+- 75.690 MHz --- Channel 75
130
+- 75.710 MHz --- Channel 76
131
+- 75.730 MHz --- Channel 77
132
+- 75.750 MHz --- Channel 78
133
+- 75.770 MHz --- Channel 79
134
+- 75.790 MHz --- Channel 80
135
+- 75.810 MHz --- Channel 81
136
+- 75.830 MHz --- Channel 82
137
+- 75.850 MHz --- Channel 83
138
+- 75.870 MHz --- Channel 84
139
+- 75.890 MHz --- Channel 85
140
+- 75.910 MHz --- Channel 86
141
+- 75.930 MHz --- Channel 87
142
+- 75.950 MHz --- Channel 88
143
+- 75.970 MHz --- Channel 89
144
+- 75.990 MHz --- Channel 90
145
+
146
+
147
+## ref
148
+
Tech-dat/pitch-dat/pitch-dat.md
... ...
@@ -0,0 +1,6 @@
1
+
2
+
3
+# pitch-dat
4
+
5
+- 2.54 mm
6
+- 3.96 mm - [[VH3.96-dat]]
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app-dat/RC-apps-dat/rc-Marine-vehicle-dat/rc-boat-dat/rc-boat-dat.md
... ...
@@ -46,6 +46,29 @@ A **wave deflector** is a structure or plate used to **redirect, reduce, or brea
46 46
![](2025-12-06-13-55-25.png)
47 47
48 48
49
+
50
+## build 1
51
+
52
+![](2026-05-28-11-45-05.png)
53
+
54
+- [[UTC3361-dat]] - [[UTC358-dat]] - [[LM358-dat]]
55
+
56
+![](2026-05-28-11-46-21.png)
57
+
58
+![](2026-05-28-11-45-35.png)
59
+
60
+![](2026-05-28-11-45-47.png)
61
+
62
+![](2026-05-28-11-46-06.png)
63
+
64
+![](2026-05-28-11-46-36.png)
65
+
66
+- [[frequency-dat]] - [[27mhz-dat]]
67
+
68
+![](2026-05-28-11-48-44.png)
69
+
70
+- [[CONN-power-dat]]
71
+
49 72
## propeller setup
50 73
51 74
- [[propeller-dat]]
battery-dat/battery-pack-dat/battery-pack-dat.md
... ...
@@ -161,8 +161,6 @@ so for high current, always GOOD to use higher voltage pack
161 161
| 14S2P | 51.8V | 58.8V | | Higher capacity |
162 162
163 163
164
-common apps - [[Electric-tools-dat]] - [[drone-battery-dat]]
165
-
166 164
167 165
## why one bad 18650 battery will ruin other paralled batteries
168 166
... ...
@@ -329,6 +327,11 @@ In series packs, **the smallest parallel group determines the usable capacity**.
329 327
330 328
![](2026-05-19-23-45-52.png)
331 329
330
+common apps - [[Electric-tools-dat]] - [[drone-battery-dat]]
331
+
332
+- [[RC-apps-dat]]
333
+
334
+
332 335
## ref
333 336
334 337
- [[battery-dat]] - [[battery-charger-dat]]