BOM-DAT/crystal-dat/crystal-dat.md
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@@ -8,4 +8,24 @@
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### 3225
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- 24 mhz
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-- 14.7456 mhz
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\ No newline at end of file
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+- 14.7456 mhz
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+
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+
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+
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+## TXCO
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+
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+A TXCO crystal is a **Temperature Compensated Crystal Oscillator**. It's a type of crystal oscillator that's designed to maintain a stable frequency output, even when the temperature changes.
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+
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+Here's a breakdown:
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+
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+**Crystal Oscillator**: A circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency. Crystals are used to provide a stable clock signal for microcontrollers, microprocessors, and other digital circuits.
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+
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+**Temperature Compensation**: The resonant frequency of a crystal oscillator is affected by temperature. A TXCO includes additional circuitry to compensate for these temperature-induced frequency changes. This compensation can be done using analog or digital techniques.
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+
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+In essence, a TXCO is a crystal oscillator with extra circuitry to keep its output frequency stable over a range of temperatures. This makes it more accurate than a standard crystal oscillator when temperature variations are a concern.
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+
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+
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+
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+## ref
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+
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+- [[BOM-dat]]
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Board-dat/MSP/MSP1017-dat/2025-06-20-18-06-23.png
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Board-dat/MSP/MSP1017-dat/2025-06-20-18-09-49.png
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Board-dat/MSP/MSP1017-dat/MSP1017-dat.md
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@@ -0,0 +1,31 @@
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+
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+# MSP1017-dat
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+
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+- [[NE555-dat]]
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+
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+## Info
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+
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+[product url - NE555 Pulse Signal Generator (For driving stepper, servo)](https://www.electrodragon.com/product/ne555-pulse-signal-generator-driving-stepper-servo/)
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+
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+### Board Map, Dimension, Pins, chip info, Use Guide, Setup Jumper, etc.
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+
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+SCH
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+
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+![](2025-06-20-18-06-23.png)
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+
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+use guide
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+
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+![](2025-06-20-18-09-49.png)
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+
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+
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+## Applications, category, tags, etc.
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+
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+## Demo Code and Video
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+
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+## ref
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+
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+- [[MSP1017]]
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+
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+- legacy wiki page
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+
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+
Chip-dat/SemTech-dat/LR1121-dat/LR1121-dat.md
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# LR1121-dat
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+- [[lora-dat]] - [[semtech-dat]]
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+
4 6
The LR1121 is Semtech’s third generation ultra-low power LoRa® transceiver. It provides multi-band LoRa and Long Range - Frequency Hopping Spread Spectrum (LR-FHSS) communication over sub-GHz and 2.4GHz ISM bands as well as satellite S-Band and L-Band connectivity. The LR1121 is designed to comply with the physical layer requirements of the LoRaWAN® specification released by the LoRa Alliance®, while remaining configurable to meet different application requirements and proprietary protocols.
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https://www.semtech.com/products/wireless-rf/lora-connect/lr1121
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+
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+
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+## LR1121 vs SX1262 Comparison
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+
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+- [[BPSK-dat]] - [[Lorawan-dat]] - [[GNSS_dat]]
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+
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+- [[SX1262-dat]]
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+
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+| Feature | LR1121 | SX1262 |
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+|-----------------------------|---------------------------------------------|---------------------------------------------|
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+| **Frequency Range** | 430 MHz to 960 MHz | 150 MHz to 960 MHz |
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+| **Modulation** | LoRa, (G)FSK | LoRa, FSK |
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+| **Max. TX Power** | +22 dBm | +22 dBm |
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+| **RX Sensitivity** | Down to -148 dBm | Down to -148 dBm |
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+| **Geolocation** | Integrated (GNSS Scan) | No |
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+| **BPSK Modulation** | Yes | No |
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+| **LoRaWAN Compliance** | Yes | Yes |
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+| **Typical Applications** | Asset Tracking, Geolocation IoT | General IoT, Smart Metering, Remote Control |
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+| **Power Consumption** | Optimized for Low Power Geolocation | Optimized for Low Power Communication |
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+
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+**Summary:**
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+
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+* The **LR1121** is designed for applications requiring geolocation capabilities, integrating GNSS scanning for asset tracking and similar use cases.
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+* The **SX1262** is a general-purpose, low-power LoRa transceiver suitable for a wide range of IoT applications where geolocation is not a primary requirement.
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+*
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+
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+
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+
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## ref
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- [[lora-dat]] - [[LR-FHSS-dat]] - [[sub-GHz-dat]] - [[2.4GHz-dat]] - [[location-dat]]
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Chip-dat/SemTech-dat/SX1262-dat/SX1262-dat.md
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+
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+# SX1262-dat
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+
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+- [[lora-dat]] - [[semtech-dat]]
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+
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+## SX1262 Main Features
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+
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+- [[LoRa-dat]]® and [[FSK-dat]] modulation
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+- 150 MHz to 960 MHz frequency range
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+- High sensitivity: down to -148 dBm
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+- +22 dBm maximum transmit power
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+- Low current consumption: 4.2 mA RX, 28 mA TX @ +14 dBm
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+- Integrated TCXO == [[crystal-dat]]
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+- Small size: 4x4 mm QFN package
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+- Suitable for long-range IoT applications
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+- Compliant with LoRaWAN® and IEEE 802.15.4g standards
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+- Automatic Frequency Control (AFC)
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+- Time-of-Flight (ToF) capabilities
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+- Built-in antenna switch
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+- Digital RSSI == [[RSSI-dat]]
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+- Packet engine to perform CRC, FEC, whitening, and address filtering
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+
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+
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+## SX1262 vs SX1278 Comparison
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+
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+| Feature | SX1262 | SX1278 |
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+|-----------------------------|-----------------------------------------|-----------------------------------------|
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+| **Frequency Range** | 150 MHz to 960 MHz | 137 MHz to 525 MHz |
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+| **Modulation** | LoRa®, FSK | LoRa®, FSK, OOK |
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+| **Max. TX Power** | +22 dBm | +20 dBm |
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+| **RX Sensitivity** | Down to -148 dBm | Down to -139 dBm |
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+| **Current Consumption (RX)**| 4.2 mA | 10.5 mA |
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+| **Current Consumption (TX)**| 28 mA @ +14 dBm | 120 mA @ +20 dBm |
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+| **TCXO Integration** | Integrated | External |
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+| **Package** | 4x4 mm QFN | 6x6 mm QFN |
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+| **LoRaWAN Compliance** | Yes | Yes |
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+| **IEEE 802.15.4g Compliance**| Yes | No |
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+| **Typical Applications** | Long-range IoT, asset tracking, smart metering | Wireless sensor networks, remote control |
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+
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+**Summary:**
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+
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+* The **SX1262** generally offers better performance in terms of power consumption, sensitivity, and size, and supports a wider frequency range and IEEE 802.15.4g. It's a newer generation chip.
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+* The **SX1278** is an older, more established chip that is still suitable for many LoRa applications, particularly where cost is a primary concern and the advanced features of the SX1262 are not required.
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+*
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+
Chip-dat/SemTech-dat/SX1278-dat/SX1278-dat.md
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+
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+# SX1278-dat
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+
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+- [[lora-dat]] - [[semtech-dat]]
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Chip-dat/SemTech-dat/SemTech-dat.md
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@@ -30,6 +30,6 @@ https://www.semtech.com/products/wireless-rf
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## ref
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-- [[meshtastic-dat]]
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+- [[meshtastic-dat]] - [[opensource-dat]]
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-- [[lora-dat]] - [[opensource-dat]]
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+- [[lora-dat]]
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Chip-dat/TI-dat/NE555-DAT/2025-06-20-18-06-53.png
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Binary files /dev/null and b/Chip-dat/TI-dat/NE555-DAT/2025-06-20-18-06-53.png differ
Chip-dat/TI-dat/NE555-DAT/NE555-DAT.md
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-# NE555 DAT
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+# NE555-DAT
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partner: [[LM317-dat]]
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+[[6102350-dat]] == [[NE555-dat]]
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+
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## Boards
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- [[SCU1044-dat]]
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+- [[MSP1017-dat]]
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+
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## Function
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+![](2025-06-20-18-06-53.png)
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The NE555 timer IC can generate:
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## ref
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+- http://www.sparkfun.com/datasheets/Components/General/ne555.pdf
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+
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- [[pulse-generator-dat]]
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Chip-dat/chip-dat.md
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@@ -23,7 +23,7 @@ from a to z
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- [[nordic-dat]] - [[nrf52840-dat]]
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-[[TI-dat]] - [[ti-motor-dat]] - [[ti-audio-dat]] - [[ti-logic-dat]]
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+[[TI-dat]] - [[ti-motor-dat]] - [[ti-audio-dat]] - [[ti-logic-dat]] - [[NE555-dat]]
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[[realtek-dat]] - [[RTL8211-dat]]
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Tech-dat/Network-dat/RF-dat/LORA-DAT/Lora-dat.md
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@@ -9,6 +9,8 @@ AIT lora
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- [[lorawan-dat]]
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+- [[samtech-dat]]
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+
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## Info
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- LoRa is the physical layer or in simple words is the modulation, the modem or radio, the hardware.
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## Board
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-- [[DVA1007-dat]] - [[DVA1008-dat]] - [[loraduino-dat]] - [[MPC1056-dat]]
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+- [[arduino-dat]] == [[DVA1007-dat]] - [[DVA1008-dat]] - [[loraduino-dat]]
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- [[DAS1069-dat]]
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+- [[MPC1056-dat]]
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+
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## Module
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### EE1 - common series
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- [[semtech-dat]] 3'rd generation Lora Chip == [[LR1121-dat]]
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+- [[crystal-dat]]
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+
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## wiring to ESP32
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| Lora Module | ESP32 |
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## ref
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+- [[meshtastic-dat]] - [[opensource-dat]]
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+
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https://randomnerdtutorials.com/esp32-lora-rfm95-transceiver-arduino-ide/
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- [[RFM95-dat]]
Tech-dat/tech-dat.md
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@@ -3,6 +3,8 @@
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- [[board-dat]]
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+- [[chip-dat]] - [[chip-cn-dat]]
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+
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- [[power-dat]] - [[dcdc-down-dat]] - [[dcdc-boost-dat]] - [[ldo-dat]] - [[wireless-charge-dat]]
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- [[battery-dat]] - [[battery-charger-dat]] - [[battery-rechargerable-dat]] - [[BMS-dat]] - [[18650-dat]] - [[battery-pack-dat]]
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- [[BOM-dat]] - [[cable-dat]] - [[conn-dat]] - [[resistor-dat]]
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-- [[chip-dat]] - [[chip-cn-dat]]
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+
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- [[interface-dat]] - [[audio-dat]]
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- [[fiber-optic-dat]]
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+- [[lora-dat]]
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+
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### MCU / CTRL / Processing
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- [[mcu-dat]] - [[development-board-dat]]