Highlights:   

Two independent PWM generators can set the frequency, duty cycle;   

The wide frequency range, high accuracy;   

Can serial communication.

First, the module description：

Frequency is divided into three ranges:
   

XXX (no decimal point): the smallest unit is 1Hz, the range 1Hz ~ 999Hz;   

XX.X (decimal point in ten): The minimum unit is 0.1Khz; the range of 0.1KHz ~ 99.9KHz   

X.X.X. (there are three decimal point): the smallest unit is 1Khz; the range 1KHz ~ 150KHz

Frequency display example:

"100" indicates that the PWM output pulse of 100Hz;
"54.1" indicates that the PWM output pulse of 54.1KHz;
"1.2.4." Indicates that the PWM pulse output 124KHz
Duty Cycle in the range: 0 to 100;
Three frequencies duty cycle is the same, all the parameters non-volatile.
Second, the module parameters:   

Working voltage: 5--30V, support micro USB 5.0V power supply;   

Frequency range: 1Hz ~ 150KHz;   

The frequency accuracy: ± 2%;   

Output Current: <30mA;   

Output amplitude: Default 5Vp-p (settable);  

Operating temperature range: -30 ~ + 70 ℃.

Third, the parameter settings：

Module has three buttons [Set], [Up], [Down];  

Press [Set] key to switch the display four parameters (FR1: PWM1 frequency; dU1: PWM1 duty cycle; FR2: frequency of PWM2; dU2: PWM2 duty cycle), before the handover parameters, there will be corresponding parameter name flash.   

Press [Up], [Down] keys to modify the current parameter value (long press can quickly add or subtract fast).   

Two PWM each have three preset frequency, the frequency display interface, long press [SET] key to switch between three types of frequencies, three kinds of frequency duty cycle is the same value. (XXX: range 1Hz ~ 999Hz; XX.X: range 0.1Khz ~ 99.9Khz; X.X.X .: range 1Khz ~ 150Khz,).

Fourth, the scope:   

As square wave signal generator which generates a square wave signal;   

to provide a signal to the stepping motor driver;   

Adjustable pulse generation for chip use;   

produce variable pulse signal, the control-related circuit (PWM dimming, speed).
Fifth, the serial control
Baud rate: 9600 bps
Data bits: 8
Stop bits: 1
Parity bit: none
Flow control: none
1, set the PWM frequency
"S1FXXXT": setting PWM1 frequency of XXX HZ (001 ~ 999)
"S1FXX.XT": set the frequency of PWM1 XX.X KHZ (00.1 ~ 99.9)
"S1F: X.X.X.T": setting PWM1 frequency of XXX KHZ (0.0.1 ~ 1.5.0..)
'S1': PWM1
'S2': PWM2

'F': Frequency
'D': Duty Cycle
'T' is the end flag

 Set the PWM duty cycle
"S1DXXXT": setting PWM1 duty cycle XXX; (001 ~ 100)
"S2DXXXT": set PWM2 duty cycle XXX; (001 ~ 100)
Setting successful return: DOWN;
Setting failback: FALL.
NO Retail Box. Packed Safely in Bubble Bag.

Package Included:
1 x 2 way Independent PWM Generator

Features:
Easy to use and connect the wire, good performance.
Knob operation, immediately after adjusting the response output, no delay.
The power port has polarity protection, will not damage the components with power reverse.
Power supply voltage: DC 12V or 24V(tolerance ±25%), total power<1W.
Output load impedance range: 0-350 ohms(DC12V); 0-800 ohms(DC 24V).
The test output is normal, you can use a multimeter shorted "4-20mA output" terminal.
Can be used for signal sources, valve adjustment, output meter test, the light emitting diode test, analog transmitter.

Specifications:
Power Supply: DC 12V or 24V
Current: 4-20mA
Total Power: <1W
Output Load Impedance: 0-350 ohms(DC12V); 0-800 ohms(DC 24V)
PCB Board Size: 50 * 50mm / 1.97 * 1.97in
Product Weight: 38g / 1.37oz

Package List:1 * 4-20mA Signal Generator Module

Features:

These are all the parts, it need your own welding and installatio

Voltage Supply: 9-12V DC Input
Waveforms: Square, Sine & Triangle
Impedance: 600 Ohm + 10%
Frequency: 1Hz - 1MHz
SINE WAVE
Amplitude: 0 - 3V at 9V DC input
Distortion: Less than 1% (at 1kHz)
Flatness: +0.05dB 1Hz - 100kHz
SQUARE WAVE
Amplitude: 8V (no load) at 9V DC input
Rise Time: Less than 50ns (at 1kHz)
Fall Time: Less than 30ns (at 1kHz)
Symmetry: Less than 5% (at 1kHz)
TRIANGLE WAVE
Amplitude: 0 - 3V at 9V DC input
Linearity: Less than 1% (up to 100kHz) 10mA
 

2. The Function Generator component parameter table

3．The welding installation considerations, follow these steps:

1. The components are welding the front board, from low to high principles, namely the first low welding components, such as, capacitor, resistor, diode, etc.
2.Welding IC socket, terminal blocks, finally power socket, adjustable potentiometer.
3.The back with a diagonal cutting pliers to cut short the pins as far as possible

4．Debugging steps:

1．After completion of welding on IC, XR2206, pay attention to the direction of IC, insert the might damage the chip!
2. check the IC whether against, such as anti please timely correction.
3. Insert the power supply, power supply for 5.5 * 2.1 port, inside outside is negative polarity. For 9-12 v power supply voltage. The waveform may not be stable for more than 12 v

5．Using the step：

1. J1 jumper cap plug in, SIN/TRI blue terminals output sine wave (note J1, J2 can only insert one of)
2. J2 jumper cap plug in, SIN/TRI blue terminals output triangular wave (note J1, J2 can only insert one of)
3. SQU blue terminals output pulse
4. AMP :  Sine wave, triangle wave amplitude adjustment
5. FINE :  Frequency fine adjustment
6. Coarse : Frequency of coarse adjustment
7．Schematic diagram of Function Generator

Package Included:
    1 x XR2206 Function Generator DIY Kit Sine, Triangle, Square Output 1HZ-1MHZ +CASE

Feature:
With excellent performance ASIC chip function generator ICL8038, add a small amount of resistive and capacitive components, can produce sine, triangle and square wave, and the frequency of the signal, duty cycle, adjustable distortion sine wave.

Notice:
Requires a certain DIY ability, you need to weld the kit yourself：）

Description:
ICL8038 pin functions:
1 foot, 12 foot: sine waveform adjusting terminal;
2 foot: sine wave output;
3 foot: triangle wave output;
4 foot, 5 foot: the frequency and duty cycle (or waveform asymmetry) adjustment;
6 foot: V +, the positive power supply;
7 foot: offset; 8 foot: frequency adjustment input terminal;
9 foot: square wave output.
This is an open collector output terminal, work should take a load resistor to the corresponding positive power supply terminal from the pin, to get a TTL-compatible square-wave output, the load resistance must be connected to + 5V power supply;
10 foot: timing capacitor terminal;
11 foot: V-, negative power supply terminal or the ground. Use positive and negative power supply, 11 feet to the negative supply, the output waveform are symmetrical with respect to 0V; use a single positive power supply, 11 feet grounded, the output waveform is unipolar, uniform voltage is + VCC / 2;
13 feet, 14 Feet: Empty foot.
The kits are designed for a frequency range is 50-5KHz, two bands with a switch S to switch, RP1 is the frequency adjustment, RP2 is the duty cycle adjustment, RP3 is a sine wave distortion adjustment. Circuit uses 12V single power supply, input from the X1; X2, X3 is a waveform output side, you can use oscilloscope to observe three output waveforms.

Model: ICL8038
Input 12V DC
Frequency range 50-5KHz,
Size:6cm*4.5cm*0.2cm

Package Included:
1 set function signal generator module and electronic kit