Bluetooth BT121 Development Kit Design Document

BT121 is a Bluetooth dual-mode module suitable for applications requiring Bluetooth LE and BR/EDR connections. It can connect to older devices that only support Bluetooth SPP or Apple® iAP2 profiles as well as devices that support Bluetooth LE. The BT121 integrates a high-performance Bluetooth radio, a low-power ARM Cortex microcontroller and Bluegiga Bluetooth dual-mode stack software, requiring no RF or Bluetooth software development, making it very easy to use. The BT121 can be used as a modem with a separate host MCU, but applications can also be embedded into the built-in ARM® Cortex® MCU with the Bluegiga BGScriptTM scripting language.

Schematic PCB

Wireless car card with RF module

2 Layers PCB 100 x 100 mm FR-4, 1.6 mm, 1, HASL with lead, Black Solder Mask, White silkscreen; This card is part of the chassis to build a wireless car controlled with the RX480 RF module.

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NHS3100 Starter Kit for Treatment Adherence

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Wireless Home Automation (Control and Monitoring) using Nextion HMI Display_PanelBoard

2 Layers PCB 38 x 41 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen;

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Wireless communication based on NRF24 and Arduino Pro Micro

Wireless Communication with NRF24 and Arduino Pro Micro

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Wireless Home Automation (Control and Monitoring) using Nextion HMI Display_MainBoard

2 Layers PCB 56.6 x 83.1 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen;

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Portable wireless touch remote control

A tiny potable remote that can be customized to do different tasks using touch functionalities of ESP32

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Personnel wireless alarm

2-layer PCB 46 x 75 mm FR-4, 1.6 mm, 1, HASL with leads, black solder mask, white silk screen; With this simple circuit you can make a wireless people counter.​

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AP6xxx series Pin to Pin hardware compatible WiFi module peripheral circuit reference

AP6xxx series Pin to Pin hardware compatible WiFi modules, mainly with LGA44/12*12mm and LGA-50/15*13mm package sizes. Currently, we are sharing the peripheral circuit reference of the LGA44/12*12mm series WiFi modules.

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Wireless digital full-duplex intercom solution (circuit + source code)

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RTL8822BS module peripheral application reference circuit and driver information

For the integration of wifi module, the most urgent things in the early stage are
1: the application reference of wifi module peripheral circuit in hardware
2: the driver information in software

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[Open Source] Using ESP32C3 to make a mini quadruped robot

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RTL8822CS Module Hardware Reference Design Guide

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ThinkBoard LoRa Node development board based on ESP32 (reference solution)

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High-quality Bluetooth speaker design reference

Although the common Bluetooth speakers on the market are relatively cheap, their sound quality is far from satisfactory and cannot meet people's pursuit of high-quality sound. The fundamental reason is that the Bluetooth speaker box is too small and the speaker is too small, resulting in a serious lack of bass; the resonance of the plastic box causes muddy sound; the speaker is too close and the near-field sound is too narrow, etc. This design reference integrates the MaxxAudio sound enhancement chip NPCA110P, which greatly improves the problems of muddy sound, insufficient bass, and narrow near-field sound.

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Harry Potter style Bluetooth speaker design

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Open source smart bracelet project reference solution based on NRF51822

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Schematic diagram of Bluetooth card reader small speaker

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Freescale's MKM14Z64-based smart socket reference design

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GigaDevice GDM_WIFI_01 Embedded Wi-Fi Module Solution

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