Pay in 4 interest-free payments of $25.00 Learn more
Ships within 48 hours · Estimated delivery Sep 9 - Sep 14
Detect the heartbeat module KY-039
Operating Voltage: 3
5 9 50 RPM 298 40 1
Material:ABS
at 20mA current
Membrane 4X4 Matrix Keypad + Extras driver Detect the heartbeat module KY-039This Matrix Keypad 4 X 4 has 16 buttons, arranged in a telephone line 3x4 grid with a column of 4 characters (A, B, C, and D). The keys are connected into a matrix, hence only 8 microcontroller pins (4 columns and 4 rows) are required to scan the pad. It's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 8
US$ 114.00
US$ 119.00
US$ 82500.00
US$ 199.00
US$ 82500.00
US$ 124.00
US$ 94.00
US$ 102.00
US$ 94.00
US$ 34.00
US$ 79.00
US$ 49.00
US$ 34.00
US$ 82500.00
US$ 114.00
US$ 82500.00