POT 4 Click Board™

Product Code: MIKROE-5454

How Does The POT 4 Click Board™ Work? The POT 4 Click Board™ is based on the PRS11R-425F-S103B1, a high-quality rotary 10k potentiometer from Bourns, providing very accurate voltage output. The PDB081-P10-103B1 features a small form factor, offers a push-on momentary switch, a flatted shaft style, and a wide operating temperature range, withstanding 50V maximum voltage. Its typical applications include consumer white goods, test and measurement equipment, communications and laboratory equipment, and other applications requiring an analogue or digitized control voltage. The output of the potentiometer is brought to the non-inverting input of the OPA344, a rail-to-rail operational amplifier from Texas Instruments, used as a stable unity gain buffer, providing a constant input and output impedance. Without a buffer, the variable impedance would affect the reference voltage. Therefore, the OPA344 ensures good stability of the circuit. A buffered signal can be converted to a digital value using MCP3221, a successive approximation A/D converter with a 12-bit resolution from Microchip using a 2-wire I2C compatible interface, or can be sent directly to an analogue pin of the mikroBUS™ socket labelled as AN.

The selection can be performed by using an onboard SMD switch labelled as VIN SEL, placing it in an appropriate position marked as AN or ADC. Bearing that the PRS11R-425F-S103B1 has an optional push momentary switch, this Click board™ also has an interrupt that will signal to users when this feature is used. The POT 4 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development. SPECIFICATIONS Type Potentiometer Applications It can be used in audio and lighting applications, laboratory equipment, industrial automation controls, and other applications where a reliable potentiometer is required On-board modules PRS11R-425F-S103B1 - high-quality rotary 10k potentiometer from Bourns Key Features Resistance up to 10k, flatted metal shaft, low profile, push momentary switch, wide temperature and voltage range, wide mechanical angle, long rotational life, selectable analogue or digital output, and more Interface Analog, I2C Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V PINOUT DIAGRAM This table shows how the pinout of the The POT 4 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes Analog Signal AN 1 AN PWM 16 NC NC 2 RST INT 15 SW Switch Interrupt NC 3 CS RX 14 NC NC 4 SCK TX 13 NC NC 5 MISO SCL 12 SCL I2C Clock NC 6 MOSI SDA 11 SDA I2C Data Power Supply 3.3V 7 3.3V 5V 10 5V Power Supply Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description LD1 PWR - Power LED Indicator JP1 VCC SEL Left Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V SW1 VIN SEL Right Output Signal A/D Selection AN/ADC: Left position AN, Right position ADC POT 4 CLICK ELECTRICAL SPECIFICATIONS Description Min Typ Max Unit Supply Voltage 3.