Best On board Power Switching

CW QRP Shortwave Radio Kit - CW Transceiver Shortwave Radio Kit

...used for if. After ta2003 multiplication detection, the sound size is adjusted by digital potentiometer and sent to audio active filter circuit. Finally, LM386 drives speaker, and if frequency supports calibration setting..
Use 3 bs170 parallel outputs, class E amplification, 12V power supply, output power 5W! Relay switching is used for transceiver, with the function of transmitting delay adjustment to avoid frequent relay switching and improve the isolation of transceiver channel..
It has the function of automatically sending call signs, which is very convenient to use. The MCU uses the original code of our store, which can adjust the code speed, sidetone frequency and sidetone size. It can input the call sign by itself (in automatic key mode) and support power down saving..
The PCB board of this kit can be conveniently put into the 88 * 30 * 120mm aluminum chassis (the shell needs to be prepared by itself, and the opening size of the front and rear panels is in the mesh disk). Main indicators Power supply: 12V Working current: receiving ≈ 120mA @ 12V.
Emission ≈ 1A @ 12V Transmitting power: 5W @ 12V Frequency range: 7.000mhz-7.100mhz, 1kHz / 100Hz step Working mode: CW transceiver, SSB receiver.

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ImmersionRC 600mW 5.8G 5.8GHz AV Transmitter for FatShark RC Drone

600mW (28dBm, +/- 1dB) of clean output power.
Frequencies: 5740, 5760, 5780, 5800, 5820, 5840, 5860MHz.
On-board quiet switching regulator, powers 5v cameras (including HD versions).
Connector:SMA ,with supplied 5.8GHz antenna..

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Yahboom 4 Port USB 3.0 Hub for Raspberry Pi Jetson Nano ROS Robot, Compatible with USB 3.0/2.0/1.1 Driver-Free Plug&Play, Onboard External USB-A，5V (Micro-USB)，9~24V Power Port, for High-Power Device

...pport equipment -- Support ROS robot / car, Raspberry Pi / Jetson series board, PC, other boards, industrial computer, etc. Compatible with win7 / 8 / 10, Linux, Ubuntu, MacOS systems, no need drive file, plug and play. If the USB device needs to be restarted, the device can be powered off and restarted through the switching power supply without plugging and damaging the interface..
Size support Raspberry Pi stack installation -- Support installation of Raspberry Pi 4B/3B+/3B,The kit contains the exclusive copper column screw accessories for jetson nano and raspberry pi, the material is of reliable quality, and there is technical help.

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Rockville APM10W 10 400 Watt Powered/Active Studio Subwoofer Pro Reference Sub,White

Rockville APM10W 10" 400 Watt Active Studio Subwoofer in White. 200 Watt RMS. Built-in Class D Amplifier. Enclosure is made of top quality MDF wood. Our enclosure is not particleboard it is true high-grade MDF!.
The enclosure is 0.7" thick while the front board of it is a full 1.34" thickness to give you the ultimate best sound quality! Comes in 3 enclosure finish options Wood finish painted black. Wood finish painted white. Wood finish with vinyl front board.
Class "D" Amplifier Circuitry with Auto-Switching Power Supply. LED Power on/Stand-by Indicator on Rear Panel. Rubber woofer surrounds increases sound quality and eliminates unwanted distortions..
We developed the Most Optimized Magnet structure, Cone, and Cabinet Space that Reproduces the Sound to Play Back Exactly the Way it was Recorded! Specially Wound Voice Coils Produce Accurate Response along the Low Frequency Spectrum..
Thick "Wadding" protects inside the subwoofer cabinet - Wadding is a white, artificial silk-like material that we put inside the subwoofer cabinet for multiple reasons..

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Line 6 DL4 Stompbox Delay Modeler

3 programmable presets and on-board Tap Tempo.
True Bypass switching, so your direct tone is exactly that.
Expression Pedal Input - for real time control of all effect settings. Effect Selector, Delay Time, Repeats, Tweak, Tweez, Mix.
DL4 runs in discrete stereo, both inputs and outputs, so Left stays left and Right stays right. (Loop Sampler sums signal to mono).
Runs from batteries or optional power adapter..

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JOYO JP-02 Guitar Pedal Power Supply Pedal Board Guitar Power Supply with DC 18V Pedal Power Adapter & 9V 100mA 500mA Isolated DC Output for 9V 12V 18V Effect Pedals

...y. With a user-friendly LED control switch design, the LED array illuminates all effects on the board..
7-channel 9V100mA output, 1 channel 9V500mA output and 12V, 18V output each, to meet the power supply requirements of any different effects..
In the JP-02 power supply part, we use the high-current output step-down switching type integrated voltage regulator circuit produced by National Semiconductor Corporation. The chip has perfect protection circuit, including current limit and thermal shutdown circuit. The peripheral components form a high-efficiency voltage regulator circuit..
Features low-noise, high-performance and peripheral-simplified switching, the power adapter fully meets the six-level energy efficiency standard, meets national certification standards, and provides extremely comprehensive safety certification and excellent performance protection functions, including overcurrent protection overload protection and overheat protection, etc..
With a whole patent layout, it is safe and secure, simple and cool, easy to carry the effect of the power supply, which let you enjoy unimpeded music..

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Hosyond 5Pcs D1 Mini NodeMcu ESP8266 ESP-12F Wireless WiFi Module Internet of Things Development Board Compatible with Arduino/WeMos

It is a mini NodeMcu Lua Wireless development board based on ESP-8266..
Compatible with Arduino IDE and WeMos D1 Mini..
4M bytes, 5V 1A switching power supply onboard,1MB flash memory.
11 digital input/output pins, all pins with interrupt/PWM/I2C/1-wire support (except D0).
1 analog input (3.2V max input). Micro USB connection..
D1 mini development board compatible with Arduino WeMos and can be programmed in the compatible for Arduino IDE..

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UpBright AC/DC Adapter Compatible with Swagtron Swagboard T881 T882 Hero Metro Hover Plus EVO Board T882-EVO-V2-BK 82838-2 FY0173020500 PS20D302K0500UD Flypower Battery Pack Power Supply Cord Charger

UpBright New Global AC / DC Adapter Compatible with Swagtron Swagboard T881 T882 Hero Metro Hover Plus EVO Self Balancing Hooverboard Electric Scooter Hover Board T882-EVO-V2-BK HE-SBW-STRON-T881-2 HE-SBW-STRON-T881-4 STRON-T881-AC-ADPT Model FY0173020500 PS20D302K0500UD Shenzhen Flypower Technology Co., Ltd. Switching Power Supply Cord Cable PS Battery Charger Mains PSU.
Compatible with: Model PS20D302K0500UD PS200302K0500UD Shenzhen Flypower Technology Co., Ltd. 30.2V 500mA 30.2VDC 500 mA DC30.2V 30V 0.5 A Switching Power Supply Unit.
Model FY0173020500 30.2V 0.5A Battery Charger.
Swagtron Swagboard T882 Metro Hover Plus.
swagtron hooverboard t882 evo v2 Power Supply.
Compatible with: Swagtron T882 EVO Input 30.2Vdc 0.5A 62.4 Wh 30.2V 62.4Wh T882-EVO-V2-BK.
Swagtron SwagBOARD EVO V2 Hover board with Light-Up Wheels & Balance.
Swagtron Swagboard T882 Lithium-Free Hooverboard.
Swagtron T882 3sixty Neo Kids Swagboard 82838-2 Black.
SwagTron T881 24V Lead-Acid Battery Pack.
Swagtron Swagboard T881 LED Remix Hover board.
⚠️(Please Note! that the “Swagtron” available in a number of different Models Number and Connectors. Please Make sure Your Model or P/N : Match this Lis....

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Acxico 3Pcs AD828 Stereo Dynamic Microphone Preamplifier Board Pickup Module DC 3.8V-15V MIC Preamp Module

The piezoelectric ceramic piece is sensitive to the sound wave vibration transmitted by the solid, and is not sensitive to the acoustic vibration of the gas, which can effectively reduce the environmental noise and avoid the whistling caused by the self-excitation. Can be used for guitar, erhu and other musical instruments..
Ultra-small volume dynamic microphone preamplifier board,two-channel design,suitable for a single lithium battery-powered,using AD828 fever op amp chip,suitable for low voltage power supply (3.8-15V).
If you only used one channel,the other channel needs to short-circuit the input with GND,To avoid interference with the signal crosstalk..
Working voltage:DC3.8V-15V.This microphone amplifier board without power regulator circuit,can only use the battery or linear power supply,can not use switching power supply,otherwise there will be interference..

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