ST25R3911B based NFC reader expansion board for STM32 and STM8 Nucleo
CR95HF/ST25R95 based NFC reader expansion board for STM32 Nucleo
When the temperature is lower than the set threshold, the corresponding indicator light lights up and the corresponding relay is closed. The relay can drive the load (fan, refrigeration plate, heating tube, etc.). When the temperature is higher than the alarm value, the sound and light alarm will sound. The keys are setting keys, plus key and minus key. The alarm value and temperature control range can be set, the temperature measurement range is 0 to 99.9 degrees Celsius, and the accuracy is 0.1 degrees Celsius.
Flirting with jumper caps is a common practice on most boards, but not this board, which is designed to replace all those wires with an analog switch matrix. All one has to do is plug in the device and make a virtual connection on the accompanying GUI. There are also many built-in functions such as DAC and ADC, and the circuit can be switched under the prototype as needed. It also has some LEDs embedded in the breadboard area that light up and provide visual cues that they are connected to each other.
STM32 Nucleo-144 development board using STM32H745ZI MCU and SMPS, supporting Arduino, ST Zio and morpho connections
STM32 Nucleo-64 development board using STM32G431RB MCU, supports Arduino and ST morpho connection
This reference design allows a digitally programmable power supply to power a continuous wave (CW) mode ultrasound transmitter circuit via a 24V bus. There are two adjustable outputs (±2.5 to ±12V) under user software control. These outputs provide positive and negative regulator outputs up to 2A with very low ripple and noise. By adding more regulators in parallel, the power supply can be scaled to provide higher output currents up to 3A. The power supply can also be synchronized to an external clock.
The indoor environment monitoring terminal can monitor the indoor environment (temperature, humidity, lighting and other parameters). The terminal is equipped with a liquid crystal display module; it can realize real-time display of environmental parameters and clocks. The terminal is equipped with an audible and visual alarm circuit, which can set a certain When the parameters exceed the limit value, an audible and visual alarm will be issued; the terminal is equipped with a Bluetooth function, and the mobile phone can communicate interactively with the terminal through Bluetooth. It can realize functions such as detection terminal system time upload, real-time parameter query, sound and light alarm switch control, scheduled upload switch control, and alarm threshold setting.
S32K144 Evaluation Board
The incense machine control board is based on GD32E231 as the main control, using timers and PWM to control the running time and intensity of the DC pump. The 4-phase 5-wire stepper motor is ideal for lifting and lowering perfume bottle replacement and installation. The display uses the commonly used ST7567 main control 12864 display screen, which can intuitively display the working status of the incense machine.
PocketSprite is more than just a small gaming device that clips to your keychain, it's an open source, powerful and mature hardware development platform.
The MTP (modular telematics platform) provides an open development environment for prototyping smart driving applications, including vehicle connectivity to cloud services, to infrastructure and to other vehicles.
Quark based on ESP32 is an open source electronic tool that integrates electronic measurement probes and debugging tools. It has a wireless connection function and can be connected to APP.
There is a risk of electric shock and fire with this project! Light bulbs are essential devices in our lives. Incandescent and fluorescent light bulbs are typical light bulbs for household lighting fixtures. For industrial and public purposes such as street lighting, large indoor lighting, sports field lighting and any outdoor activities, apart from these bulbs, HID (High Intensity Discharge) lamps are also widely used. Typical HID lamps used for this purpose are high pressure sodium, metal halide, and mercury lamps. The last one has been banned in 2021 by the Minamata Convention on Mercury. Fixtures with incandescent and fluorescent bulbs, long used for home lighting, became obsolete within 10 years of the widespread adoption of LED lights, and currently offer only replacement bulbs. Low-wattage HID lamps are also gradually being replaced by LED lamps. High-wattage HID lamps still dominate the mainstream of large-scale lighting because the advantages of LED lamps at this level are smaller. Like many LED geeks, I built an LED fixture because it was rare, but when it became commonplace it stopped being fun. On the other hand, my nostalgia for the disappearance of glass tubes from our lives increased and I started collecting HID lamps as a light bulb geek. However, having only light bulbs makes no sense. In order to light a HID lamp, a lamp ballast rated for each bulb is required. Therefore, I designed and built an electronic HID ballast that can light a variety of HID lamps.
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