Tact Switch, SMD 4 pin 4.8x4.8x0.8 mm, Short-leg UPH Component Switch- Push Button . PcHub.com - Laptop parts , Laptop spares , Server parts & Automation
REES52 20 x Black PCB Momentary Tactile Tact Push Button Switch 4 Leg DIP 6 x 6 x 7mm: Amazon.in: Industrial & Scientific
Electronics Computer Club “the geek club” Where you will learn and have fun building interesting electronic gadgets (automation – controllers – robots). - ppt download