DEV Community: WilliamLee003

LMR400 VS LMR300: Which one to choose?

WilliamLee003 — Sat, 09 Apr 2022 06:49:57 +0000

Overview of LMR400
Times Microwave's LMR-400 is designed for adaptability, low loss, RF shielding, and weatherability. The LMR-400 has the narrowest bend radius of any cable of comparable size and performance due to its cable architecture. The cable has the lowest loss of any comparable cable. This cable offers 90 dB of RF shielding and is ideal for EMI-prone environments. The LMR-400 is suitable for both indoor and outdoor use. Use Times Microwave's LMR-400 cable for any application that necessitates a low-loss, conveniently routed RF cable (e.g. WLL, GPS, LMR, WLAN, WISP, WiMax, SCADA, Mobile Antennas). The LMR-400 cable can be used in place of an RG-8 cable.

Overview of LMR300
When compared to corrugated copper cables, the Times Microwave LMR-300 5/16 in low loss coaxial cable provides similar performance but with more flexibility and a simpler connection. For a 1 in bending radius, this 50 Ohm coaxial cable has a bare copper center conductor and a stranded outside conductor. The usage of a 90 percent braided shield results in little loss. Insulation is provided by polyethylene foam.

Couclusion of LMR400 VS LMR300 Specifications
LMR400 and LMR300 have different Inner Conductors. The inner Conductor of LMR300 is Solid BC, while the inner Conductor of LMR400 is Solid BCCAI. But LMR400 and LMR300 have the same Outer Conductors. The Outer Conductor of LMR400 and LMR300 are all Aluminium Tape. LMR400 and LMR300 are similar in many aspects, such as the operating temperature, capacitance, Inductance and so on. The major differences between them are Dia Inner Conductor, Dia Outer Conductor, frequency, and attenuation. The attenuation of LMR400 is higher than LMR300 regardless of any parameters. So If you want to choose the coaxial cables between LMR400 and LMR300, please look their specifications more carefully.

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RP2040 VS STM32: Which one is better?

WilliamLee003 — Sat, 09 Apr 2022 06:46:14 +0000

Overview of RP2040
The Raspberry Pi RP2040 is the company's first microcontroller. It brings to the microcontroller arena our distinctive values of great performance, low cost, and ease of use. It provides professional users with unrivaled power and flexibility because to its huge on-chip memory, symmetric dual-core processing complex, deterministic bus fabric, and comprehensive peripheral set reinforced with our innovative Programmable I/O (PIO) subsystem. It provides the lowest possible barrier to entry for beginning and amateur users, with thorough documentation, a polished MicroPython port, and a UF2 bootloader in ROM.
The RP2040 is a stateless device with external QSPI memory cached execute-in-place functionality. This design option allows you to select the right density of nonvolatile storage for your application while also taking advantage of commodity Flash's low pricing.
The RP2040 is built on a cutting-edge 40nm process node that delivers great performance, low dynamic power consumption, and low leakage, as well as a range of low-power modes to facilitate extended battery operation.

Overview of STM32
The STM32 32-Bit ARM® Cortex®-M MCUs from STMicroelectronics are based on the Arm Cortex-M processor and are designed to give MCU users unprecedented levels of freedom. The MCUs come in a 32-bit version that combines high performance, real-time capability, digital signal processing, and low-power, low-voltage operation. This is accomplished while retaining complete integration and development ease.
The STM32 range now includes Arm Cortex-M cores (M0, M0+, M3, M4, and M7), as well as other alternatives. This allows developers the freedom to choose the best STM32 for their applications. The ability to move applications from one device to another is given special consideration. When dealing with the STM32 family, the binary compatibility, paired with the comparable pinout assignment, hardware IP proliferation, and higher-level programming language, makes the development task significantly more convenient.

Couclusion of RP2040 VS STM32
RP2040 and STM32 are different in many aspects, such as the type of microcontroller, and Processor Series. The type of RP2040 microcontroller is Dual-core, while the type of STM32 is Signal core. The type of RP2040 Processor Series is Dual ARM Cortex-M0+ cores, while the type of STM32 Processor Series is ARM Cortex M. In addition, the some parameters of RP2040 is higher than STM32. The RAM Size of RP2040 is higher than STM32 with the 264 Kilobytes of RP2040 compared to 20 Kilobytes of STM32. The Flash Size of RP2040 is higher than STM32 with the 2MB of RP2040 compared to 64KB of STM32. However, the operating temperature of STM32 is higher than RP2040. The operating temperature of RP2040 is -20°C to +85°C, while the operating temperature of STM32 is -40°C to +85°C. So from the point of my view, I think that the RP2040 is better than STM32.

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Overview of ST-LINK/V2

WilliamLee003 — Thu, 07 Apr 2022 07:21:16 +0000

Overview of ST-LINK/V2
The ST-LINK/V2 is an in-circuit debugger and programmer for the STM8 and STM32 microcontrollers. The single-wire interface module (SWIM) and JTAG/serial wire debugging (SWD) interfaces are used to communicate with any STM8 or STM32 microcontroller located on an application board. In addition to providing the same functionalities as the ST-LINK/V2, the ST-LINK/V2-ISOL features digital isolation between the PC and the target application board. It also withstands voltages of up to 1000 Vrms.

Product contents
• USB standard A to Mini-B cable (A)
• ST-LINK/V2 debugging and programming (B)
• SWIM low-cost connector (C)
• SWIM flat ribbon with a standard ERNI connector at one end (D)
• JTAG or SWD and SWV flat ribbon with a 20-pin connector (E)

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RP2040 VS ESP32: Which one is better?

WilliamLee003 — Thu, 07 Apr 2022 07:15:18 +0000

Overview of ESP32
ESP32 is a low-cost, low-power system on a chip (SoC) series with Wi-Fi and dual-mode Bluetooth features developed by Espressif Systems! The chips ESP32-D0WDQ6 (and ESP32-D0WD), ESP32-D2WD, ESP32-S0WD, and the system in package (SiP) ESP32-PICO-D4 are all part of the ESP32 family. A dual-core or single-core Tensilica Xtensa LX6 microprocessor with a clock rate of up to 240 MHz is at its heart. Antenna switches, RF baluns, power amplifiers, low-noise receive amplifiers, filters, and power management modules are all included into the ESP32. ESP32 is designed for mobile devices, wearable electronics, and IoT applications, and it uses power-saving technologies including fine resolution clock gating, numerous power modes, and dynamic power scaling to achieve ultra-low power consumption.

Conclusion:
The Raspberry Pi Pico is a beginner-friendly microcontroller board that uses MicroPython to provide a warm introduction to the IoT branch and microcontrollers. The RP2040 is a well-designed microprocessor that may be used in practically any IoT project. It has sufficient power to get the job done efficiently. ARM M0+ is the CPU type for the dual-core processor. All of these capabilities for about $4 is a fantastic price, especially for students who want board for a variety of projects that do not require wifi access.
The ESP 32, on the other hand, is a small but powerful microcontroller board. It is a very well-developed microchip that may be utilized in a variety of IoT applications because to its low cost, low power consumption, and small size. This microcontroller board, on the other hand, has earned a reputation as one of the best boards for IoT developers because to its wireless connectivity and other fascinating features.

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CR2032 VS DL2032 VS CR2025: Are they interchangeable?

WilliamLee003 — Mon, 14 Mar 2022 08:29:08 +0000

DL2032 vs CR2032 Interchangeability
When it comes to unusual batteries like the coin type batteries, it is a bit more important to get the exact type that you are looking for to ensure that it is the correct fit and voltage and avoid having to buy the battery again. This is the case when it comes to CR batteries like the CR2032 and DL2032. The main difference between CR and DL batteries is just the maker. CR is basically a generic designation just like AA and AAA. It is used by almost all battery makers. On the other hand, the DL designation is used by the battery maker Duracell. The fact that the battery CR2032 is made by a different manufacturer can lead to some subtle differences, such as the capacity of Energizer CR2032 is 235 mAh, but the capacity of Panasonic CR2032 is 225mAh.

CR2032 vs CR2025 Interchangeability
The CR2025 and CR2032 are both 3-volt lithium coin or button cells that measure 20mm in diameter. The obvious difference between the two battery types would be thickness. The CR2032 is 3.2mm thick while the CR2025 is 2.5mm thick. Because the CR2032 is 0.7mm thicker than the CR2025, it has a higher capacity (mAh) to deliver current to the load. A standard CR2032 can nominally deliver 225mAh while the average CR2025 can nominally only deliver 160mAh. Due to the smaller capacity, the thinner battery may not last as long and may need to be replaced sooner.

DL2032 vs CR2025 Interchangeability
DL2032 and CR2025 has different Manufacturer. The manufacturer of DL2032 is Duracell, while the CR2025 is FDK America. The DL2032 and CR2025 are both 3-volt lithium coin or button cells. The difference of them are their diameter, capacity, and operating temperature. The capacity of DL2032 is 225 mAh, while the capacity of CR2025 is 170mAh. The minimum Operating Temperature of DL2032 is - 20°C, while the CR2025 is 0°C. So, they are not interchangeable.
If you want to learn more, try to follow the below link to see the article about them.
https://www.utmel.com/components/cr2032-vs-dl2032-vs-cr2025-are-they-interchangeable?id=1399

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NRF5340 VS NRF52840

WilliamLee003 — Mon, 14 Mar 2022 08:25:53 +0000

NRF5340 and NRF52840 are all Bluetooth LE and a wireless system on chip (SoC).
Conclusion of NRF5340 VS NRF52840
When compared to the nRF52840 SoC, the 0 dBm TX current of NRF5340 is 3.4 mA, while the RX current is only 2.7 mA, resulting in a reduction of 29% and 41%, respectively. The RX sensitivity of the nRF5340 is -98 dBm, which is 3 dB better than the nRF52840. This means that the nRF5340 has 3 dB better sensitivity while utilizing 41% less current.
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RP2040 VS ATMEGA328 VS ESP32 VS STM32

WilliamLee003 — Tue, 08 Mar 2022 08:20:50 +0000

What is the difference between ESP32 and STM32?
As others have mentioned, ESP32 can be utilized if you're only interested in connectivity (BLE and WiFi), whereas STM32 has a wider range of applications. STM32 + Other chip-sets are frequently used in products to accomplish communication and sensing applications.

What is the difference between ESP32 and Raspberry Pi?
The ESP32 runs on the RTOS operating system, while the Raspberry Pi runs on Linux. So, depending on your expertise and learning styles, you should pick one or the other. Although the ESP32 appears to be a simpler device in theory, there is a lot more information on the Raspberry Pi on the Internet.

What is the difference between ESP32 and ESP32 S2?
Ballast has been removed from the new ESP32-S2, and new interesting features have been added to make it more appealing to the IoT device market. It's less expensive than the ESP32, plus it has USB-OTG, LCD, and camera capability, which are useful for some applications.

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Difference between ADS1115 and ADS1015 ADS1115 VS ADS1015

WilliamLee003 — Tue, 08 Mar 2022 07:49:50 +0000

The ADS1115 and ADS1015 4-channel breakout boards are perfect for adding high-resolution analog to digital conversion to any microprocessor-based project. These boards can run with power and logic signals between 2v to 5v, so they are compatible with all common 3.3v and 5v processors. As many of 4 of these boards can be controlled from the same 2-wire I2C bus, giving you up to 16 single-ended or 8 differential channels. A programmable gain amplifier provides up to x16 gain for small signals.

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RG58 VS LMR400 Coax Cable: Which one is better ?

WilliamLee003 — Fri, 04 Mar 2022 08:36:35 +0000

Conclusion of LMR400 and RG58’s differences
RG58 has a significantly higher loss due to changes in insulation and electrical characteristics (attenuation). It's perfect for its initial application, which is mostly in cable television, but not for Helium antenna systems, especially over such a long distance. LMR240 is the basic minimum for 15 meters, however everyone in the community strongly recommends LMR400.
Although LMR400 cable has low loss, it is thicker and less flexible than RG58 or LMR240 cable, making it more difficult to work with. It comes in lengths ranging from 2' to 100' and is designed to be used with antennas and amplifiers that don't come with cabling.
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ESP12E VS ESP12F: Which one is better?

WilliamLee003 — Fri, 04 Mar 2022 08:15:23 +0000

Comparison the difference between the ESP12Eand ESP12F
The ESP12F is an improved version of the ESP12E, with a better peripheral circuit, four laminates plate process, and improved impedance matching. The signal output is better, it is stable with anti-jamming ability, and the PCB antenna has been perfected after professional laboratory testing and ROHS certification. Based on the SPI and the new six IO ports, mouth extraction allows for easier development and a wider range of applications.
The built-in cloud services on the ESP8266-12F allow you to utilize three instructions to control the global remote control feature.
The ESP-12F features a ground-breaking design, a new four-layer board, and a revised antenna. RF performance enhancement extended communication distance by 30 to 50 percent when compared to the ESP-12E! Semi-hole chip technology, metal shielding shell for all IO leads, FCC, CE, and RoHS certification, on-board PCB antenna, 4M bytes Flash.
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Brief introduction of product MP1584EN

WilliamLee003 — Thu, 17 Feb 2022 06:03:07 +0000

The MP1584en is a high frequency step-down switching regulator with an integrated internal high-side high voltage power MOSFET. It provides 3A output with current mode control for fast loop response and easy compensation.
The wide 4.5V to 28V input range accommodates a variety of step-down applications, including those in an automotive input environment. A 100µA operational quiescent current allows use in battery-powered applications.
High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition to reduce the switching and gate driving losses. The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation.
If you wnat to learn more information about the product MP1584EN, try to follow the below link to see the article about MP1584EN.
MP1584EN Features

Wide 4.5V to 28V Operating Input Range
Programmable Switching Frequency from 100kHz to 1.5MHz
High-Efficiency Pulse Skipping Mode for Light Load
Ceramic Capacitor Stable
Internal Soft-Start
Internally Set Current Limit without Current Sensing Resistor
Available in SOIC8E Package

ULN2003A vs ULN2803A？ Who is better?

WilliamLee003 — Thu, 17 Feb 2022 05:52:11 +0000

ULN2803A and ULN2003A are Darlington array ICs used to interface Logic circuits, such as microcontroller circuits, to high power devices. During the early days of your electronics tour, you may not understand the difference between these two ICs. This blog is to give you an idea about the major difference between these two ICs.

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ULN2003A is a seven-channel Darlington array used to interface microcontrollers to high voltage, high current devices such as solenoids, lamps, relays, etc. It has the capacity to drive 500mA into a single channel, up to 250mA per channel if four of the seven channels are active and 125 mA per channel if all the seven channels are active. Its output has clamp diodes for transient suppression to protect the low-power microcontroller circuits.
The ULN2003 is the replacement for the ULN2803 when using the Prop-1 Trainer Board or when using P7 (Prop-1) or P15 (Prop-2 and Prop-SX) for serial communications with devices like the AP-8, DC-16, FC-4, and RC-4.

ULN2803 is an eight-channel Darlington array used to interface microcontrollers to high voltage, high current devices such as solenoids, lamps, relays, etc. It has the capacity to drive 500mA into a single channel, up to 250mA per channel if four of the eight channels are active and 125 mA per channel if all the eight channels are active. Its output has clamp diodes for transient suppression to protect the low-power microcontroller circuits. ULN2803 is commonly used for controlling large seven-segment displays.