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| General Electronics Chat This forum is for general chat about electronics, eg: Dont know what a part does? Dont know how to read a circuit? Want to get an opinion? |
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| | #1 |
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Hi... Can i know what is a Thumbwheel switch for? And if so, how do you read the pin configuration | |
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| | #2 |
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It's usually used for scrolling navigation in handheld devices. You can figure out the pins by reading the datasheet or simply using a multimeter to find out what they do when you operate it.
__________________ Mark Higgins | |
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| | #3 |
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BCD Thumbwheel Switch is used to input-set data in digital form, this can be read by digital circuits, uC and uP systems and PLC-SCADA Interfaces.
__________________ http://malfam.googlepages.com/ | |
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| | #4 |
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I use two thumbwheel switches to select stall/service tracks for a model railroad roundhouse and turntable. Here is how to read the two switches using a PicAxe controller with the switch commons tied to + voltage. cnt1 = pins & $0F cnt1 = pin4 * 10 + cnt1 cnt1 = pin5 * 20 + cnt1 If the switch commons are grounded and b0 can be used then use the following: b0 = pins ^ $3F cnt1 = b0 & $0F cnt1 = bit4 * 10 + cnt1 cnt1 = bit5 * 20 + cnt1 cnt1 is the decimal value of the two switches. Al | |
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| Tags |
| switch, thumbwheel |
| Thread Tools | |
| Display Modes | |
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