# Input Devices **URL:** https://community.sparkfun.com/c/components-and-accessories/input-devices/123.md [Latest](https://community.sparkfun.com/latest.md) · [Categories](https://community.sparkfun.com/categories.md) · [Tags](https://community.sparkfun.com/tags.md) --- ## [About the Input Devices category](https://community.sparkfun.com/t/about-the-input-devices-category/59314)
**Author:** [@SFE-SysAdmin](https://community.sparkfun.com/u/SFE-SysAdmin)\ **Replies:** 0\ **Last updated:** [July 8, 2024, 6:21pm UTC](https://community.sparkfun.com/t/about-the-input-devices-category/59314 "2024-07-08T18:21:01Z")
Discussions related to input devices from SparkFun Electronics. --- ## [Op Amp](https://community.sparkfun.com/t/op-amp/69824)
**Author:** [@Rioghasarig](https://community.sparkfun.com/u/Rioghasarig)\ **Replies:** 1\ **Last updated:** [October 24, 2026, 10:42pm UTC](https://community.sparkfun.com/t/op-amp/69824 "2026-10-24T22:42:17Z")
I’ve got this op amp breakout SparkFun OpAmp Breakout - LMV358 - SparkFun Electronics I’ve hooked it up to a piezo pickup used to record vibrations signals. I find that the output signals are a little too large for me. … --- ## [Having issues with openscale board](https://community.sparkfun.com/t/having-issues-with-openscale-board/69729)
**Author:** [@Zjones](https://community.sparkfun.com/u/Zjones)\ **Replies:** 1\ **Last updated:** [October 12, 2026, 11:05pm UTC](https://community.sparkfun.com/t/having-issues-with-openscale-board/69729 "2026-10-12T23:05:31Z")
Hello, I’m using an Arduino Uno with input from a open scale board (13261). I’m using a 13332 sparkfun load cell. I’ve burned up 2 open scale boards. They both worked for a bit then stopped working. When checking the op… --- ## [Sparkfun mono audio amplifier](https://community.sparkfun.com/t/sparkfun-mono-audio-amplifier/69649)
**Author:** [@Rioghasarig](https://community.sparkfun.com/u/Rioghasarig)\ **Replies:** 2\ **Last updated:** [October 9, 2026, 3:23am UTC](https://community.sparkfun.com/t/sparkfun-mono-audio-amplifier/69649 "2026-10-09T03:23:38Z")
I’m attempting to use the audio amplifier circuit board I have a diagram for my attempt to set it up \[Album\] imgur.com … --- ## [New PCB'er - figuring out what I need for my PCB](https://community.sparkfun.com/t/new-pcber-figuring-out-what-i-need-for-my-pcb/68912)
**Author:** [@Aayan\_Khan](https://community.sparkfun.com/u/Aayan_Khan)\ **Replies:** 1\ **Last updated:** [May 29, 2026, 2:08pm UTC](https://community.sparkfun.com/t/new-pcber-figuring-out-what-i-need-for-my-pcb/68912 "2026-05-29T14:08:40Z")
Hi everyone, this is my first post here, and I just had some questions : ) I was looking at the schematic for the AS7263 NIR sensor, and was trying to figure out what sensor they use for the actual IR reading. I found i… --- ## [DC-DC Step Up Boost Converter](https://community.sparkfun.com/t/dc-dc-step-up-boost-converter/68629)
**Author:** [@Raul\_Caudillo](https://community.sparkfun.com/u/Raul_Caudillo)\ **Replies:** 2\ **Last updated:** [April 23, 2026, 7:10pm UTC](https://community.sparkfun.com/t/dc-dc-step-up-boost-converter/68629 "2026-04-23T19:10:49Z")
I am in need for a 4V to 20V DC-DC step up boost converter. Do you supply these components? --- ## [Qwick hat I2C not working on raaspbeery pi 5 - tech support requested](https://community.sparkfun.com/t/qwick-hat-i2c-not-working-on-raaspbeery-pi-5-tech-support-requested/67483)
**Author:** [@jmiller9930](https://community.sparkfun.com/u/jmiller9930)\ **Replies:** 3\ **Last updated:** [December 5, 2025, 7:37am UTC](https://community.sparkfun.com/t/qwick-hat-i2c-not-working-on-raaspbeery-pi-5-tech-support-requested/67483 "2025-12-05T07:37:06Z")
i think this chip is not working correctly. follow the test pattern and code. let me know the official test from spark-fun to test to see of the board is good or not. What is required to get my sensor discoverable on… --- ## [SparkFun 2D Barcode Scanner Breakout - Disable Setting Barcodes](https://community.sparkfun.com/t/sparkfun-2d-barcode-scanner-breakout-disable-setting-barcodes/66347)
**Author:** [@vxdrew](https://community.sparkfun.com/u/vxdrew)\ **Replies:** 2\ **Last updated:** [November 25, 2025, 12:22pm UTC](https://community.sparkfun.com/t/sparkfun-2d-barcode-scanner-breakout-disable-setting-barcodes/66347 "2025-11-25T12:22:42Z")
I’m playing with the SparkFun 2D Barcode Scanner Breakout to possibly use it in an upcoming project. As described in the manual, there is a set of “setting barcodes” that can be scanned to change how the scanner is confi… --- ## [Change to COM-16273 Thumb Joystick Deluxe part](https://community.sparkfun.com/t/change-to-com-16273-thumb-joystick-deluxe-part/67307)
**Author:** [@nosek001](https://community.sparkfun.com/u/nosek001)\ **Replies:** 4\ **Last updated:** [November 7, 2025, 10:13pm UTC](https://community.sparkfun.com/t/change-to-com-16273-thumb-joystick-deluxe-part/67307 "2025-11-07T22:13:55Z")
I ordered these parts from SparkFun on Sep 2025. Compared to a previous order from Oct 2023 it’s a different part now, and the range of the pots on the new part is smaller than it was which causes “dead spots” in the fou… --- ## [Oops I wired the wav trigger incorrectly](https://community.sparkfun.com/t/oops-i-wired-the-wav-trigger-incorrectly/66914)
**Author:** [@Retro\_Amusements\_NL](https://community.sparkfun.com/u/Retro_Amusements_NL)\ **Replies:** 3\ **Last updated:** [September 22, 2025, 1:20pm UTC](https://community.sparkfun.com/t/oops-i-wired-the-wav-trigger-incorrectly/66914 "2025-09-22T13:20:12Z")
I was up late using bad lighting and stupidly connected the power supply to the speaker + & - terminals. The correct connection should be on the opposite side of the board on the vin and gnd. Once I powered up the wav t… --- ## [ I'm looking for a reliable channel for purchasing power modules.](https://community.sparkfun.com/t/im-looking-for-a-reliable-channel-for-purchasing-power-modules/66284)
**Author:** [@Eunce](https://community.sparkfun.com/u/Eunce)\ **Replies:** 1\ **Last updated:** [July 31, 2025, 6:38pm UTC](https://community.sparkfun.com/t/im-looking-for-a-reliable-channel-for-purchasing-power-modules/66284 "2025-07-31T18:38:20Z")
Hello, dear seniors~ I’m a newcomer in this field. Recently, I’ve been learning about power supply-related projects. I’d like to ask you all, through which channels do you usually purchase power module components? Are t… --- ## [Any miniplugs for Sparkfun USB-C breakout boards?](https://community.sparkfun.com/t/any-miniplugs-for-sparkfun-usb-c-breakout-boards/65412)
**Author:** [@TG](https://community.sparkfun.com/u/TG)\ **Replies:** 5\ **Last updated:** [June 7, 2025, 2:55pm UTC](https://community.sparkfun.com/t/any-miniplugs-for-sparkfun-usb-c-breakout-boards/65412 "2025-06-07T14:55:49Z")
Are there any miniature plugs to use with the 1mm-dia holes in Sparkfun USB-C breakout boards? I do not want to solder wires as this would be a semi-permanent connection… --- ## [Comparator input bias current in Micro?](https://community.sparkfun.com/t/comparator-input-bias-current-in-micro/64564)
**Author:** [@treez](https://community.sparkfun.com/u/treez)\ **Replies:** 1\ **Last updated:** [April 14, 2025, 9:28pm UTC](https://community.sparkfun.com/t/comparator-input-bias-current-in-micro/64564 "2025-04-14T21:28:53Z")
Hi, Do you believe that the attached LTspice simulation is the best way to analyse the effects of the input bias current in one of the comparators inside the STM32L073 (48 pin) microcontroller? STM32L073 datasheet htt… --- ## [2D Barcode Scanner Build Error](https://community.sparkfun.com/t/2d-barcode-scanner-build-error/63966)
**Author:** [@ccagle](https://community.sparkfun.com/u/ccagle)\ **Replies:** 10\ **Last updated:** [March 18, 2025, 9:24pm UTC](https://community.sparkfun.com/t/2d-barcode-scanner-build-error/63966 "2025-03-18T21:24:40Z")
I’ve been trying to get the DE2120 2D Barcode Scanner to work with the demo scripts in the github: I have been through the installation instructions, but I am unable to install the package file. I keep getting this er… --- ## [Pulse tones](https://community.sparkfun.com/t/pulse-tones/61577)
**Author:** [@djrogers1208](https://community.sparkfun.com/u/djrogers1208)\ **Replies:** 4\ **Last updated:** [November 3, 2024, 7:10pm UTC](https://community.sparkfun.com/t/pulse-tones/61577 "2024-11-03T19:10:09Z")
I was wondering if there is some way to make an old telephone rotary dial activate 10 different relays. Let me explain: If for instance I dial a 2 on the rotary dial, it will activate relay two, dial a three and activate… --- ## [Rotary Encoder Arduino Library Suggestion Needed](https://community.sparkfun.com/t/rotary-encoder-arduino-library-suggestion-needed/60238)
**Author:** [@RossWaddell](https://community.sparkfun.com/u/RossWaddell)\ **Replies:** 0\ **Last updated:** [September 3, 2024, 6:48pm UTC](https://community.sparkfun.com/t/rotary-encoder-arduino-library-suggestion-needed/60238 "2024-09-03T18:48:15Z")
I’m using the SparkFun rotary encoder COM-09117 and up until now this Arduino library, ClickEncoder. However, it requires the TimerOne library which has two bugs that affect the encoder’s button use. Also, when I add the…