For getting a more clear idea about the device check out the above video.
Step 1: Gather the Components and Tools.
The list of item(s) are as follows:
1.3x 2pin Screw Terminals.
2.A perforated circuit board.Cut them in 2cm X 2cm size approximately.
3.An SPDT or DPDT PCB mount switch.
4.Any two battery sources under 15V each.
5.Any load source(eg-LED,Motor etc.)
6.A strong adhesive.
7.A rubber adhesive.
Step 2: Analyse the Circuit Diagram and Place the Components Accordingly.
At initial condition of the switch, the output only comes from the primary battery, but the moment when switch is moved to other position, the negative terminal of the primary battery shifts it's contact to the positive terminal of the second battery thereby giving a series output of voltages from the individual battery sources.
1.Now start placing the components in such a way that you need not require longer soldering traces and requires the least amount of overlapping junctions.
2.Place the screw terminals first.If it doesn't go smoothly into the perforated board, slightly enlarge the holes by the help of a small tip screw driver and then place the switch.
3.Once you are sure about the layout,glue them using a strong adhesive as the screw terminals may get displaced from its original position over long usage.
4.After that using two markers of different colors, mark the terminals of battery sources 1, 2 and at the output terminal.
Step 3: Soldering and Continuity Testing.
For making sure that there's no short circuit(s) and no broken channel(s) have a continuity check.
Step 4: Testing of the Module With Two Similar and Dissimilar Battery Sources.
Check for the voltage displayed on the multimeter and check whether you get an average sum of two voltages of the individual battery sources.
Step 5: Gluing the Base of the Circuit Board With Rubber Adhesive.
Step 6: Applications and Conclusion.
1.The main application is to switch between a series output voltage or an individual output voltage from two different battery sources.
2. Controlling voltage also controls energy this means it can be used to create:
a) 2-SPEED motor.
b) 2-Level Brightness control Light.
c) Small Purpose Dual Voltage Power Supply.
3.When connected to a single battery source at primary terminal, this module can be used as a ON/OFF switch to control the battery output.
This small portable module may come handy for small applications and electronic projects.