This panel seems robust and well designed. I would like the contact resistance be higher. I checked the values with a multimeter, and they varied between 400 and 700 ohms. This is perhaps okay, but I will be adding four resistors in series with either the horizontal or the vertical lines, to ensure no real current.
After removing the film on the back, in order to use the adhesive, the wiring becomes visible. The 8 lines are divided along the middle, with four lines going vertically and four horizontally.
After attaching it on a surface, I had to peel it off once before replacing it, and that put some heavy strain on the panel, and I was sure it wouldn't work afterwards, being so severely bent while pulled off, but it worked fine, with nice click feel of the buttons.
Overall a good buy.
I haven't written code for scanning this yet, but that should be easy enough, cycling over four lines (the vertical or horizontal group) designated as output, setting one high at a time, then scanning the other four, set as inputs.
An i2c interface would be nice, but this will do fine.
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This item: DEVMO 2PCS 4 x 4 Matrix Array 16 Key Membrane Switch Keypad Keyboard Compatible with Ar-duino/AVR/PIC
$10.99
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Product information
| Package Dimensions | 7.17 x 4.72 x 0.71 inches |
|---|---|
| Item Weight | 3.63 ounces |
| Manufacturer | DEVMO |
| ASIN | B07RB47RM1 |
| Item model number | uredset-246 |
| Customer Reviews |
4.2 out of 5 stars |
| Best Sellers Rank | #173 in Security Access-Control Keypads |
| Date First Available | April 29, 2019 |
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Compare with similar items
This Item  DEVMO 2PCS 4 x 4 Matrix Array 16 Key Membrane Switch Keypad Keyboard Compatible with Ar-duino/AVR/PIC | Recommendations  |  |  |  |  | |
| Price | $10.99 | $8.69 | $14.99 | $7.99 | $7.54 | $9.95 |
| Delivery | Get it as soon as Friday, May 16 | Get it as soon as Friday, May 16 | Get it as soon as Friday, May 16 | Get it as soon as Friday, May 16 | Get it as soon as Friday, May 16 | Get it as soon as Friday, May 16 |
| Customer Ratings | ||||||
| Sold By | developmoreus | daier us | SazkJere | Teyleten Robot-US | hightseckw | Jessinie |
| connectivity tech | USB | USB | PS/2 | USB | USB | USB-C |
| number of keys | 16 | 20 | 12 | 16 | 16 | 12 |
| compatible devices | Ar-duino/AVR/PIC Microcontrollers | PC | Microcontroller-compatible devices | Arduino, microcontrollers, single-board computers | PC | PC |
| keyboard description | Membrane | Membrane | Numeric | Membrane | This is a 16-button keyboard module in a 4x4 button design, great for external keyboards of microcontrollers. It is made of Acrylonitrile Butadiene Styrene (ABS) material, with a modern style and number theme. The keyboard is compact, saving space and easy to connect with a USB cable. It is a brand new, high-quality product compatible with PCs. | Membrane |
Versatile, looks and works great.
I used a pad to bypass a malfunctioning OEM membrane switch assembly on my Maytag Neptune dryer.
Top reviews from the United States
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- Reviewed in the United States on January 3, 2021
I used a pad to bypass a malfunctioning OEM membrane switch assembly on my Maytag Neptune dryer.
Images in this review
- Reviewed in the United States on October 14, 2023
- Reviewed in the United States on June 22, 2023
Top reviews from other countries
- Richie RichReviewed in Canada on July 19, 2024
Good for projects and applications requiring flat, splash resistant keypad
- ShopbotReviewed in Canada on July 18, 2024
good for your automation projects
