Control board for the Soft Gripping Fingers were made with the list of items mentioned in Table 01. A common 12V 5A regulated switching power supply module was used to power up the whole control board. 1/4'' Pneumatic 3 Way 2 Position spring return solenoid valve 12VDC were used to control air flow in to the actuator and in the same time miniaturized diaphragm pneumatic pump which provides 50psi of air pressure was used to generate air supply continuously. Arduino Mega is connected to interface the control board with Processing IDE which connects the Leap Motion Controller and other control algorithm. Buck converter which converts 12VDC into 5VDC with MOSFET driver modules were used to control solenoid valves using 5VDC output of Arduino mega. Sphygmomanometer pressure sensor with differential amplifier circuit, to read input air pressure to Arduino mega and also a Flex sensor, to detect the bending of the actuator, were used.
Table 01 shows the list of items need to develop 5 solenoid control board.
Table 01: List of items for the Control Board
| Item with description |
| |
1 | 1/4'' Pneumatic 3 Way 2 Position single Solenoid valve 12VDC | 5 | |
2 | 1/4'' NPT male to Tube OD 6mm Straight Connector Push In Fitting | 10 | |
3 | Tube OD 6mm Union cross Push In Fitting | 1 | |
4 | Tube OD 6mm Union Y Push In Fitting | 7 | |
5 | Tube OD 6mm Pneumatic Bulkhead Union Push In Fitting | 5 | |
6 | OD 6mm Pneumatic Tube | 6m | |
7 | Miniature Diaphragm Pneumatic Pump | 1 | |
8 | MOSFET Driver Module | 5 | |
9 | Buck Boost Converter | 1 | |
10 | Sphygmomanometer Pressure Sensor | 5 | |
11 | Rocker toggle switch x 8 (Red 2, blue 5) | 7 | |
12 | Potentiometer | 5 | |
13 | 12V 5A Regulated Switching Power Supply | 1 | |
14 | Arduino Mega | 1 | |
15 | Flex sensor | 1 | |
16 | Cast Acrylic sheet | - | |
17 | Heat-Shrinkable tubing ,Jumper wires, lugs, Cable ties, Hot Glue, Screws, nuts, etc | - |