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Sadly, I got such a hampered multifunction shield, but a slice of thin film helped me to clear that issue. They will likely come into contact with the top of Arduino’s USB connector. It seemed that most multifunction shields don’t have their pins of the seven-segment LED display module trimmed enough. But I couldn’t find more information about those wonderful add-ons so far.
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Likewise, the serial interface (UART) in the same header can also be used for interfacing other serial modules like Bluetooth, radio, voice, voice recognition, etc. The APC220 module (see next image) has a total of nine pins (only seven are in use), and its small size makes it an ideal solution for wireless data transfer applications. The APC220 header feeds power to the module on pins 1 and 2 (GND and 5 V) and connects pins 4 and 5 (UART) to Arduino pins 0 and 1. Truthfully, I’m not familiar with those APC220 wireless modules! As found in the datasheet ( ), APC220 is a highly integrated semi-duplex low-power transceiver module with a high-speed MCU and a high-capability RF IC.
![tentacle shield for arduino setup download tentacle shield for arduino setup download](https://cdn-learn.adafruit.com/guides/images/000/000/116/medium800/overview.png)
When using LM35, the sensor must be inserted correctly - i.e., in the inverse direction with its label side looking toward the top of the shield. It’s noteworthy that the temperature sensor socket’s pin assignment is in the correct order for DS18B20 only. I think that we can use the type TSOP1838/AH1838/VS1838 infrared receiver module here. Similarly, pin notation for the infrared receiver module is OUT(D2)-GND-5V. The jumper J1 feeds 5 V to the middle pin DQ through a 10K resistor. Also, the legend “U5-18b20-LM35-A4” has an arrow pointing up toward the middle pin (A4) of the temperature sensor header (GND on the left, DQ in the middle, and 5 V on the right). As indicated in the top silkscreen layout, the flat (labeled) side of the temperature sensor must face the bottom side of the multifunction shield fronting the three pushbuttons. Looking at the schematic, it looks like using the DS18B20 temperature sensor (and the infrared receiver module) requires a bit of research. Analog pin A4 is for the temperature sensor, digital pin D2 is for the infrared receiver module, and digital pins D4, D7, and D8 handle the LED display.
![tentacle shield for arduino setup download tentacle shield for arduino setup download](https://aws1.discourse-cdn.com/smartthings/original/3X/4/1/4168db522bbb8c1f676a9017f50d3c90d8a11406.png)
Digital (pwm) pin D3 drives the piezo-buzzer through a PNP transistor, and the analog pin A0 takes care of the 10K trimpot. Looking up the schematic will save you a lot of time on future experiments.Īs you can see, the four LEDs are bonded with digital pins D10–D13 while the three pushbuttons are routed to analog pins A1–A3.
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Here is a circuit diagram of the multifunction shield adopted from the web (updated a bit by me).
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Arduino is a great way for today’s novices to start to learn how to write and run codes that interact with the external world.