Electronic Switched & Keypad Modules
Showing all 5 results
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Electronic Components, Electronic Switched & Keypad Modules
2 x 2 Matrix 4 Push Button Keyboard Module
-50%
Electronic Components, Electronic Switched & Keypad Modules2 x 2 Matrix 4 Push Button Keyboard Module
First test whether any key is pressed down. Connect power to rows, so they are High level. Then set all the rows R1-R2 as Low and then detect the status of the columns. Any column of Low indicates there is key pressing and that the key is among the 4 keys of the column. If all columns are High, it means no key is pressed down. Next, locate the key. Since the column in which the pressed key lies is identified, knowing the line would finalize the testing. Thus, set the rows as Low in turns until any is unveiled accordingly – other rows will still be High.
Now the row can be identified. Detect the status of each column in turns. The column tested Low is the one intersecting with the line – their cross point is just the key pressed.Package Includes:
1 * 2 x 2 Matrix 4 Push Button Keyboard Module
SKU: n/a -
Buck Boost Voltage Regulators, Electronic Components, Electronic Switched & Keypad Modules
4×4 Matrix 16 Push Button Keypad Keyboard Module
-48%
Buck Boost Voltage Regulators, Electronic Components, Electronic Switched & Keypad Modules4×4 Matrix 16 Push Button Keypad Keyboard Module
Features:
- 4×4 Matrix Keyboard Module with 16 buttons.
- Small in size and hence Save space.
- More convenient to use.
- Expanded development application modules for single chip.
- With 16 keys and 8 pin.
SKU: n/a -
Electronic Modules, Electronic Switched & Keypad Modules, Relay Modules
8-Channel 5V Relay Board Expansion Module With Optocoupler-Control Large Voltages-Relay Expansion Board-AC-DC Appliance Control-LED Indicators AB0288
-41%
Electronic Modules, Electronic Switched & Keypad Modules, Relay Modules8-Channel 5V Relay Board Expansion Module With Optocoupler-Control Large Voltages-Relay Expansion Board-AC-DC Appliance Control-LED Indicators AB0288
This is an 8-Channel 5V 10A Relay Module with optocoupler. It can be directly controlled by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM, PLC, etc. It can control various appliances and other types of equipment with large current. Output rating for each relay is 250V/10A AC or 5V/10A DC. Triode drive | Increasing relay coil | Strong driving ability | Fixed bolt hole | Easy installation | Diode effusion protection | Short response time | Board mode selection | Real-time working status indicator | Pull-down circuit for avoidance of malfunction | High impedance controller pin Relay module:140×58 mm This 8-channel relay module can be used to control various appliances, and other equipments with large current. It can be controlled by a number of microcontrollers such as Arduino, AVR, PIC, ARM. It is ideally suited to controlling larger voltages in your project through Wi-Fi. It can be used to control 220V AC load. It has a normally open contact and one normally close contact. Number of channels:8 Operating Voltage:5V Max Switching Current (AC):10A @250V AC Max Switching Current (DC):10A @30V DCWhat’SKU: AB0288
