INTRODUCTION

DAC series modules are a range of products that can be controlled through I2C or PWM signals to generate voltage or current output signals. They possess the capability to produce a variety of analog voltage or current signals, including 0-5V, 0-10V, 0-2.5V, 0-VCC, and 0-25mA.

An analog quantity refers to the continuous variation of voltage magnitude (or current magnitude) within a specific range. Due to its stability, long transmission distance, and ease of use, it has found widespread application in the field of industrial automation control, including:

Motor speed control
Sound intensity control
Temperature regulation
Adjustment of light brightness
Valve angle modulation

etc.

This series of DAC products not only offers a variety of output signal ranges, but also provides three selectable resolutions: 8-bit, 12-bit, and 15-bit. It allows for the choice of either single-channel or dual-channel configurations, and multiple modules can be cascaded to form a multi-channel output. When coupled with Arduino controllers, Raspberry Pi, STM32, and similar controllers, it finds application in various automation control scenarios, including:

Laboratory testing equipment
Automatic motor speed control
Indoor and outdoor lighting control
Automated volume adjustment
Backlight control for displays

etc.

The following table presents the functional parameters of each DAC product for reference in the selection process.

DFR1036 GP8101S （1-Channel PWM to 0-5V/10V DAC Module）

FUNCTIONS

This is a 1-channel DAC module with PWM communication, a resolution of 8-bit, and 0.1% output voltage linearity error, capable of generating analog voltage outputs of 0-10V or 0-5V. The 0-10V or 0-5V voltage output is a standard driving method. It can be widely used in automation control scenarios such as lighting adjustment, frequency converters, valve regulation, and pump control,etc. This product can drive a variety of 0-10V or 0-5V controlled devices available in the market through Arduino programming.

PWM signal drive allows the module to be controlled by MCU digital ports, providing a simple and convenient usage.

FEATURES

Support 3.3V-5V power supply.
Output voltage linearity error of 0.1%.
Two channels of voltage output, either 0-5V or 0-10V, enabling connection and control of standard analog voltage devices.
Gravity interface, PWM communication, Arduino control, suitable for program automation control.
PWM signals can be utilized to drive the module, enabling it to be controlled simply by the digital port of the MCU.

DIMENSION

FUNCTIONAL DIAGRAM

Name	Description	Remarks
PWM Interface	VCC	Positive terminal of the power supply (3.3V-5V)
	GND	Negative terminal of the power supply
	D	PWM Input Port
0-5V/0-10V Switching Switch	0-10V	Switch output voltage to 0V-10V
	0-5V	Switch output voltage to 0V-5V
Voltage Signal Output Port	VOUT	Positive terminal of output voltage signal
	GND	Negative terminal of the output voltage signal

SPECIFICATIONS

Chip Type: GP8101S
Operating Voltage: 3.3V-5V
Output Voltage: 0-5V or 0-10V
Number of Channels: 1 channel
Communication Method: PWM
Resolution: 8-bit
Value Range: 0 - 255 corresponding to 0-5V or 0-10V
Output voltage linearity error： 0.1%

TUTORIAL

In this example, we will Demonstrates the variation of output voltage for the same input signal in two different states.

Input signal value range: 0-255

In the state of 0-5V: Input value of 176, resulting in an output voltage of 3.45V.
In the state of 0-10V: Input value of 176, resulting in an output voltage of 6.90V.

SOFTWARE REQUIREMENTS

Download Arduino IDE： Click to download Arduino IDE
Download Arduino libraries： Click to download https://github.com/DFRobot/DFRobot_GP8XXX

Click the link to view：How to install the library?;

Note: All modules in this series utilize the same library.

HARDWARE CONNECTION

SAMPLE CODE

#include <DFRobot_GP8XXX.h>

//Output IO Port
int pwmPin = 9;
DFRobot_GP8101S GP8101S(pwmPin);
void setup() {

  GP8101S.begin();

  /**
   * @brief. Set the output DAC value.
   * @param data pwm 
   * @n. Optional parameters (0-255) correspond to voltage ranges of (0-5V) or (0-10V), and the specific voltage range is determined by the fluctuation switch selected based on the module voltage. 
   */
  GP8101S.setDACOutVoltage(176);//Output voltage of 3.45V under the 0-5V state and 6.90V under the 0-10V state.
}

void loop() {

}

RESULT

After downloading the program, the voltmeter was used to measure the actual output voltage of 3.45V under the 0-5V state and 6.90V under the 0-10V state.

FAQ

For any questions, advice or cool ideas to share, please visit the DFRobot Forum.

DFR1036_1_Channel_PWM_to_0-10V_DAC WIKI