nRF52832 series IC is used to BLE interface of an energy harvesting platform. BLE communication module is designed to charge main cacacitor to upper limit and then generates an interrupt to MCU to enable the BLE IC. If the stored energy is getting low another… Read More »Energy Harvest BLE Module
ESP32 sound board is updated version of audio enabled foreign speech development device for kids and mentally diabled people. Because of high memory requirement WROVER type of ESP32 is used in this design. I prefer to place all component in one side but becaue of… Read More »ESP32 Sound Board
MultiTester is developed to test AC control smart plug mainboard. Its configuration is able to fit many connected/smart application. ESP32 WROOM WiFi/BLE MCU 7-22V DC input AC 220 detector Pluggable step motor driver Servo motor header Micro SD card 5V 2A relay WS2812 Neopixel RGB… Read More »ESP32 Multi Tester
Control board is designed for 2 purposes. One is to control fan speed in an industrial/military computer and the other is to monitor CAN line and send a serial packet for a filtered packet. ATSAMC21 MCU 5V input with polarity control 1 Serial/RS232 selectable port… Read More »CAN/Serial Fan Control Board
This project is combination of a windows application developed in SharpDevelop in C# and an arduino application running on any arduino board with serial interface. These two applications communicate via serial port. Any other MCU with USART is wellcome. The idea was to control function… Read More »Keyboard Simulator Arduino & Sharp Develop
Differential pair routing is a critical issue in PCB design. If the differential pair signal is high speed signal like USB 2.0, USB 3.0 or HDMI then PCB routing is harder than lower speed signals like RS485, CAN or similar. In this tutorial you are… Read More »Differential Pair Routing in Altium Designer
Access control board is designed to grant access via BLE or ISO14443 contactless card. It is powered by ESP32 dual core microcontroller. WiFi is supported by MCU, board also support Ethernet via Wiznet5500 IC. See below for full specs.
Raspberry Pi CM3 carrier board has industrial range power supply and input filter. See all specs and ref photos below.