Tamper Click Board™

Product Code: MIKROE-2551

The Tamper Click Board™ is equipped with SDS001, a low profile side-actuated detect switch, made by C&K company. This is a high-quality, low-current detection switch, which is designed in a form of a push button. The switch itself is very small - only 2mm of switch overtravel length, which coupled with its low actuation force, makes it ideal for using it as a contact detector in various applications - consumer electronics devices, medical devices, smart card detection and similar applications. The Tamper Click Board™ is also additionally equipped with the RC filter that minimizes the bouncing effect, making this click a reliable solution for any contact detection application. How Does The Tamper Click Board™ Work? The Tamper Click Board™ is equipped with SDS001, low profile side-actuated detect switch. The switch itself acts as a push button and has 2 NO (Normally Open) terminals, which get shorted when the force is applied to the small piston-shaped button of the switch. These kinds of switches are usually mounted on the edge of the PCB so they can be easily reached by the elements that would apply a pressure to the switch.

The applied pressure closes the circuit, connecting the VCC routed to the first pin of the switch, with the INT pin on the mikroBUS™ The microcontroller is then able to detect a high logical level on the INT pin and the desired task can then be executed. The applied RC filter serves both as a debouncing circuitry and a pull-down for the terminal of the switch, preventing the floating state that way. The used switch itself is intended to operate with digital signal levels, thus its electrical characteristics are tailored for this purpose: low contact resistance of 100mΩ, relatively low contact ratings of 100mA at 12V and 50 000 switching cycles before the failure. These attributes make it ideal for digital signal applications, specifically. Onboard SMD jumper allows using either 5V or 3.3V at the VCC level. This should be selected accordingly to the microcontroller pin voltage capability. SPECIFICATIONS Type Pushbutton/Switches Applications Contact detector in various applications - consumer electronics devices, medical devices, smart card detection and similar applications On-board modules Side-actuated detect switch, made by C&K company Key Features Light pressure force needed to activate the switch, high number of switching cycles, optimized to be used in digital circuit Interface GPIO Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V or 5V PINOUT DIAGRAM This table shows how the pinout of the Tamper Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 NC NC 2 RST INT 15 INT Switch signal NC 3 CS RX 14 NC NC 4 SCK TX 13 NC NC 5 MISO SCL 12 NC NC 6 MOSI SDA 11 NC Power supply 3V3 7 3.3V 5V 10 5V Power supply Ground GND 8 GND GND 9 GND Ground TAMPER CLICK ELECTRICAL SPECIFICATIONS Description Min Typ Max Unit Actuation force - - 75 gr Contact resistance - - 100 mΩ Mechanical and electrical life - - 50000 cycles ONBOARD SETTINGS AND INDICATORS Label Name Default Description JP1 VCC SEL Left Power supply voltage selection 3V3/5V, left position 3V3, right position 5V S1 SWITC