MAX4466 Electret Microphone Amplifier Module Noise immunity Preamplifier Adjustable Gain OUT GND VCC Amplifier Board 2.4-5V DC
11.44 9.95 $
There may be slight variations due to different batches produced each time. If you mind, please purchase carefully, or consult us before placing an order. thank you for understanding
Product selling point:
1. Using high-quality materials, the quality is guaranteed
2. Multiple specifications are optional, cost-effective
3. Small size, easy to embed in any product
4. Powerful function, support LWIP protocol, freertos
5. Support three modes: AP, STA, AP+STA coexistence mode
ESP-WROOM-32 is a general WiFi BT BLE MCU module, which is powerful and versatile.
The module is the core ESP32 chip, with scalable, adaptive functions, two CPU cores can be controlled or powered on individually, the clock frequency can be adjusted from 80 MHz to 240 MHz, the user can cut off the power of the CPU, and use low-power co-processing The ESP32 also integrates a large number of peripheral devices, including capacitive touch sensors, Hall sensors, low-noise sense amplifiers, SD card interface, Ethernet interface, high-speed SDIO/SPI, UART, I2S and I2C.
ESP-WROOM-32 integrates traditional Bluetooth, Bluetooth low energy and Wi-Fi, and has a wide range of uses: Wi-Fi supports a wide range of communication connections, as well as direct connection to the Internet through a router; Bluetooth allows users to connect mobile phones or broadcast BLE messages. Standard for signal detection, ESP32 chip sleep current is less than 5 A, suitable for battery-powered wearable electronic devices, ESP-WROOM-32 supports data rates up to 150 Mbps, and provides up to 22 dBm output power through a power amplifier for The largest range of wireless communication, therefore, the chip has industry-leading specifications and provides the highest performance in terms of high integration, wireless transmission distance, power consumption and network connectivity.
The operating system of ESP32 is freeRTOS with LWIP, and built-in TLS 1.2 with hardware acceleration. The chip also supports OTA encryption upgrade, and developers can continue to upgrade after the product is released.
CP2102-Yellow (Micro USB welded yellow pin)
CP2102-black (Micro USB welded black pin)
CP2102 Micro USB-B (Micro USB NO welded black pin)
CP2102 Micro USB-Y (Micro USB NO welded yellow pin)
Lithium battery interface, 500mA maximum charging current
The package includes:
16P needle x1pcs
20P needle x1pcs
WEMOS LOLIN32 x1pcs
NodeMcu ESP32 CP2102
ESP32-CAM OV2640 ( ESP32-CAM + OV2640 Camera Module)
Product selling point:
1. Low-power dual-core 32-bit CPU for application processors
2. Multiple specifications optional
3. Using high-quality materials, the quality is guaranteed
4. The product looks beautiful
5. Good performance
Main frequency up to 240MHz, computing power up to 600 DMIPS
Built-in 520 KB SRAM, external 4M PSRAM
Support UART / SPI / I2C / PWM / ADC / DAC and other interfaces
Support OV2640 and OV7670 cameras, built-in flash
Support picture WiFi upload
Support TF card
Supports multiple sleep modes
Embedded Lwip and free RTOS
Support STA/AP/STA+AP working mode
Support Smart Config / AirKiss one-click distribution network
Support secondary development.
We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.
Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.
Yes. We provide free shipping to over 200 countries around the world. However, there are some location we are unable to ship to. If you happen to be located in one of those countries we will contact you.
We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.
Shipping time varies by location. These are our estimates:
|Location||*Estimated Shipping Time|
|United States||10-30 Business days|
|Canada, Europe||10-30 Business days|
|Australia, New Zealand||10-30 Business days|
|Central & South America||15-30 Business days|
Yes, you will receive an email once your order ships that contains your tracking information.
For some shipping companies, it takes 2-5 business days for the tracking information to update on the system.
For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.
If you have any other questions, please contact us and we will do our best to help you out.
All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.
Your satisfaction is our #1 priority. Therefore, if you’d like a refund you can request one no matter the reason.
If you did not receive the product within the guaranteed time(60 days not including 2-5 day processing) you can request a refund or a reshipment.
If you received the wrong item you can request a refund or a reshipment.
If you do not want the product you’ve receive you may request a refund but you must return the item at your expense and the item must be unused.
*You can submit refund requests within 15 days after the guaranteed period for delivery (60 days) has expired. You can do it by sending a message on Contact Us page
If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.
If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.
Please do not send your purchase back to us unless we authorise you to do so.
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