[LPD433/Modules] add project (#150)

* [LPD433/Modules] add project

* tidy and spelling

* [Radio] more tidy and spelling

Author: tardate

README.md

@@ -1,4 +1,4 @@
-# 731 Little Electronic Art Projects
+# 732 Little Electronic Art Projects
 
 > Latest addition:sparkles: [Raspberry Pi B+ Case](./RaspberryPi/BPlusCase) - Finally, 3D PLA printing a case for the Raspberry Pi Model B+ ... at the library.
 

Radio/AM/HX108-2/README.md

@@ -192,8 +192,8 @@ The circuit basically maps to the following stages:
 * Second IF Filter and Amp: B4, V3
 * Demodulator: B5, V4
 * Audio amp:
-  * V5 audio driver/preamplifier
-  * B6, B7, V6, V7 push-pull class B power amplifier
+    * V5 audio driver/preamplifier
+    * B6, B7, V6, V7 push-pull class B power amplifier
 
 A quick sketch from my notes on the functional design:
 

Radio/AM/HX6B/README.md

@@ -18,7 +18,6 @@ Building and Aligning HX 6B AM Kit Radio by shango066
 
 [![clip](https://img.youtube.com/vi/6rNbZj3tpOs/0.jpg)](https://www.youtube.com/watch?v=6rNbZj3tpOs)
 
-
 ## Parts
 
 | Ref     | Part                        | Notes           |
@@ -67,7 +66,6 @@ The HX6B is a superheterodyne design with a single IF stage. The design basicall
 
 ![The Schematic](./assets/HX6B_schematic.jpg?raw=true)
 
-
 ## Credits and References
 
 * [the kit from a seller on aliexpress](https://www.aliexpress.com/item/DIY-Kits-Superheterodyne-Radio-Receiver-6-Transistor-sch-case-w-Speaker/32367150788.html)

Radio/AM/SimpleCrystalTransmitter/README.md

@@ -14,14 +14,13 @@ This is perhaps **the** classic AM transmitter - a self-oscillating crystal with
 amplitude modulated by transformer coupling between signal (audio) source and voltage driving the oscillator.
 
 Since it is "rock-locked", this transmitter has no frequency agility!
-It only operates on the frequency of the crsytal (1MHz in this case).
+It only operates on the frequency of the crystal (1MHz in this case).
 
 One of the best demonstrations is covered in
 "How to Make AM Radio Transmitter" by RimstarOrg:
 
 [![clip](https://img.youtube.com/vi/_4-Sx-T6VBc/0.jpg)](https://www.youtube.com/watch?v=_4-Sx-T6VBc)
 
-
 ## Circuit Design
 
 The final circuit includes an output filter network (C1, C2, C3 and L1) as shown in the schematic.
@@ -34,7 +33,6 @@ but in the final build I used a 600Ω:600Ω audio transformer without problem.
 
 ![Schematic](./assets/SimpleCrystalTransmitter_schematic.jpg?raw=true)
 
-
 ## Initial Breadboard Build
 
 The most basic build just required the CMOS oscillator and transformer.
@@ -52,7 +50,6 @@ While it is easy to pickup with an AM receiver, the sound quality is understanda
 
 ![scope_unfiltered_modulated_audio](./assets/scope_unfiltered_modulated_audio.gif?raw=true)
 
-
 ## Adding Output Filtering
 
 After AC coupling the output with C1, I added a T-filter comprising C2, L1 and C3.
@@ -69,7 +66,6 @@ the modulation can be seen quite clearly in this peak trace:
 
 ![SimpleCrystalTransmitter_bb_build2](./assets/SimpleCrystalTransmitter_bb_build2.jpg?raw=true)
 
-
 ## Putting it on Protoboard
 
 To snapshot the circuit for my project archive, I transferred the circuit to protoboard

Radio/AMFMRadioKit/README.md

@@ -19,7 +19,7 @@ The kit is designed around 3 core integrated circuits:
 
 ## Construction
 
-Some clarifications/intepretations of the instructions. Yes, its's all in simplified Chinese;-)
+Some clarifications/interpretations of the instructions. Yes, its's all in simplified Chinese;-)
 
 * battery leads are connected to pads marked GB+/GB-
 * the inductor with ferrite core fits in a plastic mount that slides/clips to the PCB. The leads are soldered to the two pads marked AM. This is the medium wave/AM antenna

Radio/FM/SimplestDirectReceiver/README.md

@@ -31,7 +31,7 @@ The most basic version of a simple direct conversion FM radio is covered in
 [3.15.1](https://www.mikroe.com/ebooks/radio-receivers-from-crystal-set-to-stereo/the-simplest-fm-receiver)
 of Mikroelektronika's excellent online book "Radio Receivers, from crystal set to stereo".
 
-Many variations of this ciruit are available around the web, often with the addition of an LM386 amplifier stage,
+Many variations of this circuit are available around the web, often with the addition of an LM386 amplifier stage,
 such as [this design](https://electronicsforu.com/electronics-projects/simple-fm-receiver)
 on electronicsforu.
 
@@ -83,7 +83,7 @@ that theoretically gives me a tuning range of
 [45.8 MHz](https://www.wolframalpha.com/input/?i=1%2F(2%CF%80*sqrt(0.55%C2%B5H*22pF)))
 to
 [96.0 MHz](https://www.wolframalpha.com/input/?i=1%2F(2%CF%80*sqrt(0.55%C2%B5H*5pF)))
-(that's a bit on the low side for the braodcast FM range, but I'll have a shot at shifting the range
+(that's a bit on the low side for the broadcast FM range, but I'll have a shot at shifting the range
 later).
 
 That corresponds to the performance I'm seeing - able to pick up all stations up to around 97.4 MHz very clearly.
@@ -94,8 +94,7 @@ One difference between various designs is the positioning of the variable capaci
 some have it in parallel going to the positive rail.
 I tried both combinations, with the final "good" circuit using the parallel arrangement (maybe it would work just as well going to ground, but I haven't testing it).
 
-
-Even though I have relatively strong FM broadcast signals in my area, I found an antenna indispensible.
+Even though I have relatively strong FM broadcast signals in my area, I found an antenna indispensable.
 I added 60cm of random wire, with a 10pF coupling capacitor.
 
 One other variation in my circuit was the choice of transistor.
@@ -105,7 +104,7 @@ A good substitution is perhaps 2N5109 with a 1200MHz gain bandwidth product.
 I don't have any 2N5109's, so I've simply used S9014 with only a 270MHz  gain bandwidth product,
 although of the stock I have on hand, an S9018 (800 MHz) might have been a better choice.
 
-## Construction
+## Final Construction
 
 The final circuit I used is as follows:
 

Radio/FM/SingleStageTransmitterKit/.catalog_metadata

@@ -6,4 +6,4 @@
     "relative_path": "Radio/FM/SingleStageTransmitterKit",
     "updated_at": "2019-08-04T11:25:24Z",
     "created_at": "2019-08-04T11:25:24Z"
-}
+}

Radio/FM/SingleStageTransmitterKit/README.md

@@ -9,8 +9,8 @@ Build a simple single-stage FK702 FM Transmitter Kit by Future Kit.
 I've been experimenting with FM, and the hardest thing to get right tends to be the hand-wound coils.
 So to get a baseline, I picked up a 1-transistor kit during a recent visit to Sim Lim Tower.
 
-The kit is the FK702 by [Future Kit](http://futurekit.com/). It takes the hastle out of getting the LC circuit
-right by printing the inductor coil on the PCB (used in conjuction with a trimmer capacitor).
+The kit is the FK702 by [Future Kit](http://futurekit.com/). It takes the hassle out of getting the LC circuit
+right by printing the inductor coil on the PCB (used in conjunction with a trimmer capacitor).
 
 ### Power Connections
 

Radio/FM/TwoStageTransmitter/README.md

@@ -19,7 +19,7 @@ The first transistor Q1 is an audio amplifier for the electret microphone.
 
 The LC tank circuit (C4, L1) provides the base carrier oscillator.
 C5 modulates the carrier frequency, but it is subject to bypass by the second transistor Q2.
-The degree of bypsass will depend on the voltage current applied to the base of Q2.
+The degree of bypass will depend on the voltage current applied to the base of Q2.
 Thus audio voltage controls the frequency of the oscillator i.e. we have FM!
 
 ### Component Selection and Results

Radio/LPD433/Modules/.catalog_metadata

@@ -0,0 +1,9 @@
+{
+    "id": "#712",
+    "name": "LPD433 Modules",
+    "description": "A roundup of readily available LPD433 modules, low power devices operating on the 433 MHz UHF/70-centimeter band.",
+    "categories": "Radio, LPD433",
+    "relative_path": "Radio/LPD433/Modules",
+    "updated_at": "2025-03-18T05:12:00Z",
+    "created_at": "2025-03-18T05:12:00Z"
+}

Radio/LPD433/Modules/README.md

@@ -0,0 +1,161 @@
+# #712 LPD433 Modules
+
+A roundup of readily available LPD433 modules, low power devices operating on the 433 MHz UHF/70-centimeter band.
+
+![Build](./assets/Modules_build.jpg?raw=true)
+
+## Notes
+
+Paired RF transmit/receive modules are widely available at low cost.
+The devices fit into the general category of
+[short range/low-power devices](https://en.wikipedia.org/wiki/Short-range_device)
+and specifically [LPD433](https://en.wikipedia.org/wiki/LPD433) - low power devices operating on the 433 MHz UHF/70-centimeter band.
+
+Typically applications
+
+* remote control switch
+* automotive anti-theft products
+* home security products and alarm systems
+* remote control electric doors, windows, gates
+* remote control curtains
+* remote control socket
+* remote control LED
+* remote control audio, MP3, speakers
+* remote control vehicles
+
+The following notes describe the main module types that are readily available on the market.
+
+### Module 1: WL102-341/RX470
+
+![module1](./assets/module1/module1.jpg)
+
+This appears to be an earlier design.
+Still readily available on aliexpress, for example from this seller:
+[QIACHIP 433Mhz RF Transmitter and Receiver](https://www.aliexpress.com/item/32651427149.html).
+
+The main thing to note for this design is that while the receiver can operate up to 5V, the transmitter is specified for max supply of 3.6V.
+
+* Receiver module, typically marked RX470-4 or similar (e.g. RX470C-V01)
+    * With long antenna for receiver
+* Transmitter module, typically marked WL102-341
+    * With short antenna for transmitter
+
+#### Module 1 Receiver, typical specifications
+
+Typically marked RX470-4 or similar (e.g. RX470C-V01)
+
+* Working voltage: DC 2.2~5V
+* Quiescent Current: 1µA
+* Max current: 2.1mA
+* RF frequency: 433.92 MHz
+* Frequency band: +/- 150KHz
+* transmission rates: 2KHz to 10KHz
+* Working temperature: -30~+80 degrees
+* Receiving Sensitivity: -110dBm
+* Size: 30x9x6mm
+* RF Operating mode: ASK/OOK superheterodyne wireless reception
+* Pinout
+    * GND: ground or negative pole
+    * D0: Data output
+    * D0: Data output
+    * VCC: Power input
+    * ANT: Antenna
+* External antenna: 32CM single core wire, wound into a spiral
+
+![module1_rx](./assets/module1/module1_rx.jpg)
+
+![module1_rx_schematic](./assets/module1/module1_rx_schematic.jpg)
+
+### Module 1 Transmitter, typical specifications
+
+Transmitter module, typically marked WL102-341
+
+* Working voltage: DC 2-3.6V
+* Quiescent Current: 1µA
+* transfer rate: 20KHz
+* RF frequency: 433.92 MHz
+* Working temperature: -30~+80 degrees
+* Receiving Sensitivity: larger than 11dBm
+* Size: 16x12x6mm
+* RF Operating mode: ASK/OOK superheterodyne wireless reception
+* Pinout
+    * DAT - Wave signal input
+    * OUT - Antenna pin . RF signal output, can directly connect to the antenna.
+    * EN - Enable Pin .But this product EN pin is connected to the power supply, no function
+    * Power- ground Pin . The ground wire connects power supply.
+    * Power supply pin . Power Input
+
+![module1_tx](./assets/module1/module1_tx.jpg)
+
+![module1_tx_schematic](./assets/module1/module1_tx_schematic.jpg)
+
+### Antenna Specifications
+
+Basic Antenna Recommendation
+
+* The antenna core of conductor diameter(including the Antenna skin): 1.0mm, except the Antenna skin: 0.5mm
+* The wire length of weld end: 17.5mm, the wire length of antenna terminal: 9.5mm;
+* The diameter of antenna winding (including the Antenna skin):5mm;
+* The turn number of winding: 15 turns
+
+![antenna1](./assets/module1/antenna1.jpg)
+
+Enhanced Antenna Recommendation for greater distance:
+
+* The antenna core of conductor diameter (including the Antenna skin): 1.0mm; (except the Antenna skin): 0.35mm
+* The wire length of weld end: 12mm
+* The diameter of antenna winding (except the Antenna skin):3.0mm;
+* The turn number of winding: 26 turns; The length of the winding: 36mm
+
+![antenna2](./assets/module1/antenna2.jpg)
+
+### Module 2: MX-05V/MX-FS-03V
+
+This appears to be a newer design.
+Readily available on aliexpress, for example from this seller:
+[433 Mhz RF Transmitter and Receiver Module Link Kit for ARM/MCU WL DIY 315MHZ/433MHZ Wireless Remote Control for arduino Diy Kit](https://www.aliexpress.com/item/32896035786.html).
+
+The main thing to note for this design is that while the receiver still operates up to 5V, the transmitter is specified for max supply of up to 12V.
+
+![module2](./assets/module2/module2.jpg)
+
+Typical receiver specifications
+
+* Product Model: MX-05V
+* Operating voltage: DC5V
+* Quiescent Current: 4MA
+* Receiving frequency: 433.92MHZ/315Mhz (optional)
+    * receiver has 2.5 round inductor for 433MHz
+    * receiver has 3.5 round inductor for 315Mhz
+* Receiver sensitivity:-105DB
+* Size: 30x14x7mm
+* External antenna: 32CM single core wire, wound into a spiral
+
+![module2_rx](./assets/module2/module2_rx.jpg)
+
+Typical transmitter specifications
+
+* Product Model: MX-FS-03V
+* Launch distance: 20-200 meters (different voltage, different results)
+* Operating voltage: 3.5-12V
+* Dimensions: 19 x 19mm
+* Operating mode: AM
+* Transfer rate: 4KB/s
+* Transmitting power: 10mW
+* Transmitting frequency: 433Mhz/315Mhz (optional)
+* An external antenna: 25cm ordinary multi-core or single-core line
+* Pinout from left to right: DATA; VCC; GND.
+
+![module2_tx](./assets/module2/module2_tx.jpg)
+
+Remarks
+
+* VCC voltage module operating voltage and good power filtering;
+* Great influence on the antenna module reception, preferably connected to the 1/4 wavelength of the antenna, typically 50 ohm single conductor, the length of the antenna 433M of about 17cm;
+* Antenna position has also affected the reception of the module, the installation, the antenna as possible straight away from the shield, high pressure, and interference source; frequency used to receive, decode and oscillation resistor should match with the transmitter.
+
+## Credits and References
+
+* [433 Mhz Superheterodyne RF Receiver Module and Transmitter Module with antenna for Arduino DIY Kit](https://www.aliexpress.com/item/33036669166.html) - aliexpress seller
+* [short range/low-power devices](https://en.wikipedia.org/wiki/Short-range_device) - wikipedia
+* [LPD433](https://en.wikipedia.org/wiki/LPD433) - wikipedia, info about low power device 433 MHz/70-centimeter band standards.

Radio/LPD433/Modules/assets/Modules_build.jpg

@@ -18,7 +18,7 @@ This is a quick build of a wireless doorbell using:
 * and an [HS-088 ding-dong sound chip](https://www.aliexpress.com/item/32661936820.html)
 
 I decided not to use any encoding over the wireless link, so I'm using it more like a spark-gap transmitter.
-So far in my experiements, I'm not seeing enough interference to get false positives ringing the doorbell.
+So far in my experiments, I'm not seeing enough interference to get false positives ringing the doorbell.
 If that changes, I'd probably add an ATtiny and run a simple ASK signal over the connection. We'll see how this goes..
 
 ### RF Module Specs
@@ -73,7 +73,7 @@ For good reception over about 30m with a few blocking walls and doors, I found t
 
 ## Construction
 
-I put the receiver circuit on a small piece of protoboard and mounted in a probject box with a speaker
+I put the receiver circuit on a small piece of protoboard and mounted in a project box with a speaker
 and a micro-USB adapter (for power only)
 
 ![build_rx_1](./assets/build_rx_1.jpg?raw=true)

Radio/LPD433/Modules/assets/module1/antenna1.jpg

@@ -1,6 +1,6 @@
 {
     "id": "#063",
-    "name": "RFSwitch",
+    "name": "RF Switch",
     "description": "simple remote control switch with 433Mhz transmitter/receiver and some analog signal processing",
     "categories": "Radio, OpAmp, LPD433",
     "relative_path": "Radio/LPD433/RFSwitch",