Boards & Programmer

This is XH-W1219 12V Digital Red+Green Display Temperature Controller Module W/ NTC Waterproof Temperature Sensor. The XH-W1219 thermostat module with its C and I/O (sensor input, keys, double display, relay) can be re-programmed for automation tasks, and its easy to work with.

Digital thermostat module. The temperature controller/switch with waterproof NTC probe and integrated LED display in red and green.

Note: This board is Nuvoton based.

Get the all-new DC 12V XH-M452 Temperature And Humidity Controller Module Digital Display. It has a very High Accuracy Dual Output Automatic Constant Temperature And Humidity Control Board.

Humidity Control

• Set to start humidity: long-press the + key, start the humidity value flashing, set by + / key launch humidity value
• Set stop humidity: long press to stop humidity value, set by + / key to stop the humidity value

Temperature Control

• Setting the temperature +: Normal display mode, long-press the + key for 3 seconds, start temperature numerical flashing, press the + / key setting values, the wrong operation after 5 seconds, automatically return to detect temperature display
• Setting the temperature :Normal display mode, long press button for 3 seconds, stop numerical flashing temperature, press the + / key set value
• Restore the factory Settings: At the same time long press temperature, and humidity + key for 3 seconds, digital display, 888, 888
• Setting the start temperature: Long press the + key, start the flashing temperature, set start temperature by + / key
• Setting Stop temperature: long press button, stop flashing temperature, set stop temperature by + / key

Use the USB Charger Doctor to measure the working voltage and current output for any USB port and project. This blue plastic dongle plugs between a USB device and passes the data lines through. There is a 0.05-ohm resistor in line with the power pin that is used to measure current draw.

The Doctors digital display instantly reads the numbers out for testing devices such as chargers, cables, and cell phones.

You can use this device from the 3.5-7VDC input voltage (although most USB devices tend to hover around 4.75 to 5.25) and up to 3A of current. It flips between voltage and current readouts every 3 seconds or so. Its a very handy tool for testing USB devices, checking load levels and debugging battery chargers and boost converters. Its a little chunkier but more numerical thanour USB Power Gauge Mini-Kit. Its also not open source so check out the USB Power Gauge mini kit if you want to hack together your own power gauge indicator.

This TCRT5000 Single Channel Line Tracking Sensor Module is a great detector for a line-following robot. Potentiometer to adjust the sensitivity of the individual sensors.

TCRT5000 Single Channel Line Tracking Sensor Module is a carrier board for TCRT5000 reflective optical sensor. Although it is designed for use with line-following robots, it can be used in mini-sumo robots for line control. The board has a digital output.

The concept of working of line follower sensor is related to light. We use here the behavior of light at the black and white surface. When light fall on a white surface it is almost fully reflected and in case of black surface light is completely absorbed. This behavior of light is used in building a line follower sensor.

Each phototransistor is connected to a pull-up resistor to form a voltage divider that produces an analog voltage output between 0 V and VIN (which is typically 5 V) as a function of the reflected IR. The lower output voltage is an indication of greater reflection.

This MPR121 is a capacitive touch sensor controller driven by an I2C interface. The chip can control up to twelve individual electrodes, as well as a simulated thirteenth electrode The MPR121 also features eight LED driving pins, when these pins are not configured as electrodes, they may be used to drive LEDs. There are four jumpers on the bottom of the board, all of which are set (closed) by default. An address jumper ties the ADD pin to the ground, meaning the default I2C address of the chip will be 0x5A. If you need to change the address of the chip (by shorting ADD to a different pin), make sure you open the jumper first. Jumpers also connect SDA, SCL, and the interrupt pin to 10k pull-up resistors. If you do not require the pull-up resistors you can open the jumpers by cutting the trace connecting them.

Magic Light Cup Module is a board which has a led and a mercury tilt switch. Using PWM to drive the LEDs on the module you can achieve the effect of light being magically transferred from one module to the other when tilting them. In short, its 2 components combined, a mercury tilt switch and a led. On tilting the module mercury inside small tube connect the switching point and make switch ON while tilting it to other side move the mercury and it disconnects the circuit and switch get OFF. The module operates on 5V DC supply.

So the magic in the name of this module is because when you tilt the switch, the led will turn on and off. And Of course, it is also possible to connect it to the NodeMCU.

Infrared transmitting tube, also known as an infrared light-emitting diode, as part of the diode. It is can convert electrical energy directly into the near-infrared. Light (not visible) and the radiation out of the light-emitting device, mainly used in all kinds of photoelectric switch and remote transmission circuits. Infrared transmitting tube structure, the principle of similar to an ordinary light-emitting diode, just use different semiconductor materials. Infrared LEDs are typically used gallium arsenide (GaAs), aluminum gallium arsenic (GaAlAs), and other materials, the use of transparent or light blue, black resin encapsulation.