# Components & Accessories **URL:** https://community.sparkfun.com/c/components-and-accessories/121.md?page=1 [Latest](https://community.sparkfun.com/latest.md) · [Categories](https://community.sparkfun.com/categories.md) · [Tags](https://community.sparkfun.com/tags.md) **Page:** 2 --- ## [A question about the LiPo Fuel Gauge](https://community.sparkfun.com/t/a-question-about-the-lipo-fuel-gauge/68072)
**Author:** [@doctorwho8](https://community.sparkfun.com/u/doctorwho8)\ **Replies:** 3\ **Last updated:** [February 19, 2026, 12:56am UTC](https://community.sparkfun.com/t/a-question-about-the-lipo-fuel-gauge/68072 "2026-02-19T00:56:23Z")
Hello! The device LiPo Fuel Gauge is obviously configured in a fashion that predates the QWIIC style. Can it be wired thusly to that device is used to enable an I2C device like this, into the QWIIC style? I have an appl… --- ## [3D Expert will trade out 3D design help for Simple EE and Software help](https://community.sparkfun.com/t/3d-expert-will-trade-out-3d-design-help-for-simple-ee-and-software-help/68101)
**Author:** [@jimcdenver](https://community.sparkfun.com/u/jimcdenver)\ **Replies:** 0\ **Last updated:** [February 18, 2026, 5:42pm UTC](https://community.sparkfun.com/t/3d-expert-will-trade-out-3d-design-help-for-simple-ee-and-software-help/68101 "2026-02-18T17:42:50Z")
Hi there. I am a recently retired Industrial Designer with a specialty in precise 3D modeling. I have had the chance to design hundreds of very cool products along the way, many of which incorporated some type of electro… --- ## [Constant Current Power Supply - 12.6V 10A](https://community.sparkfun.com/t/constant-current-power-supply-12-6v-10a/68092)
**Author:** [@benkingjo](https://community.sparkfun.com/u/benkingjo)\ **Replies:** 2\ **Last updated:** [February 18, 2026, 4:41pm UTC](https://community.sparkfun.com/t/constant-current-power-supply-12-6v-10a/68092 "2026-02-18T16:41:00Z")
Hi, I purchased this product: PRT-18722 However, after testing it by connecting the power supply and setting the input voltage to 22 V with maximum currents at 25 A, I utilized an electronic load to draw currents from t… --- ## [SparkFun Logic Level Converter - Bi-Directional Step Down 5V Signals to 3.3V and Steps up 3.3V to 5V Board Dimensions: 0.63 x 0.52 (16.05 x 13.33mm)](https://community.sparkfun.com/t/sparkfun-logic-level-converter-bi-directional-step-down-5v-signals-to-3-3v-and-steps-up-3-3v-to-5v-board-dimensions-0-63-x-0-52-16-05-x-13-33mm/68048)
**Author:** [@Ecollins00](https://community.sparkfun.com/u/Ecollins00)\ **Replies:** 1\ **Last updated:** [February 12, 2026, 12:08am UTC](https://community.sparkfun.com/t/sparkfun-logic-level-converter-bi-directional-step-down-5v-signals-to-3-3v-and-steps-up-3-3v-to-5v-board-dimensions-0-63-x-0-52-16-05-x-13-33mm/68048 "2026-02-12T00:08:19Z")
I just got a SparkFun Logic Level Converter - Bi-Directional Step Down 5V Signals to 3.3V and Steps up 3.3V to 5V Board Dimensions: 0.63 x 0.52 (16.05 x 13.33mm) and have a problem. I got the board of Amazon snet a messa… --- ## [FemtoBuck - How to prevent current output while arduino is resetting](https://community.sparkfun.com/t/femtobuck-how-to-prevent-current-output-while-arduino-is-resetting/45562)
**Author:** [@ImogenWren](https://community.sparkfun.com/u/ImogenWren)\ **Replies:** 4\ **Last updated:** [February 9, 2026, 2:14pm UTC](https://community.sparkfun.com/t/femtobuck-how-to-prevent-current-output-while-arduino-is-resetting/45562 "2026-02-09T14:14:53Z")
Hi, I am working on a 12 channel LED lighting project using the FemtoBuck LED drivers. Each channel is meant to limit current to a pre-set value, and we have a multitude of very expensive LEDs we do not wish to damage t… --- ## [What is the pitch of the JST connector for speaker COM-21311?](https://community.sparkfun.com/t/what-is-the-pitch-of-the-jst-connector-for-speaker-com-21311/67982)
**Author:** [@ARBiag](https://community.sparkfun.com/u/ARBiag)\ **Replies:** 2\ **Last updated:** [February 5, 2026, 5:20pm UTC](https://community.sparkfun.com/t/what-is-the-pitch-of-the-jst-connector-for-speaker-com-21311/67982 "2026-02-05T17:20:18Z")
Hi all, I’m trying to figure out the pitch on that 28mm speaker, COM-21311 – the description just says “JST connector” but not the pitch. Does somebody know? Thanks in advance! --- ## [1.5" Sparkfun OLED 128x128 not working](https://community.sparkfun.com/t/1-5-sparkfun-oled-128x128-not-working/67983)
**Author:** [@Javier\_Viramontes](https://community.sparkfun.com/u/Javier_Viramontes)\ **Replies:** 1\ **Last updated:** [February 5, 2026, 5:14am UTC](https://community.sparkfun.com/t/1-5-sparkfun-oled-128x128-not-working/67983 "2026-02-05T05:14:48Z")
I have a 1.5" Sparkfun OLED 128x128 and Twist Rotary Encoder Combo that does not seem to work. The first day I got it, i plugged in the quick cables, and boom it was hot! They work separately but seem to get static when … --- ## [Raspberry Pi Monitor Defective](https://community.sparkfun.com/t/raspberry-pi-monitor-defective/67967)
**Author:** [@rszkotnicki](https://community.sparkfun.com/u/rszkotnicki)\ **Replies:** 3\ **Last updated:** [February 5, 2026, 1:37am UTC](https://community.sparkfun.com/t/raspberry-pi-monitor-defective/67967 "2026-02-05T01:37:09Z")
I purchased a Raspberry Pi Monitor - Red/White (SKU: LCD-27642) and SUPPORT TOLD ME I MUST CREATE A POST HERE. Despite powering it from multiple approved power supplies and directly from a pi 5 it does not power on. No l… --- ## [Compile error in Sparkfun\_Qwiic\_OLED library](https://community.sparkfun.com/t/compile-error-in-sparkfun-qwiic-oled-library/67920)
**Author:** [@bryanbarmore](https://community.sparkfun.com/u/bryanbarmore)\ **Replies:** 2\ **Last updated:** [January 30, 2026, 5:26pm UTC](https://community.sparkfun.com/t/compile-error-in-sparkfun-qwiic-oled-library/67920 "2026-01-30T17:26:03Z")
I just received the Qwiic OLED - (1.3in., 128x64) display and when testing I’m getting a compile error in the library. I installed Sparkfun\_Qwiic\_OLED v1.0.15. I’m using the Arduino IDE v2.3.7 and connected the display t… --- ## [STHS34PF80 - Clarify what is presenceVal cm^-1](https://community.sparkfun.com/t/sths34pf80-clarify-what-is-presenceval-cm-1/67763)
**Author:** [@rs1](https://community.sparkfun.com/u/rs1)\ **Replies:** 10\ **Last updated:** [January 21, 2026, 3:17pm UTC](https://community.sparkfun.com/t/sths34pf80-clarify-what-is-presenceval-cm-1/67763 "2026-01-21T15:17:40Z")
STHS34PF80 board - I’m experiment with mainly detecting a presence, human or other, e.g. animals – not moving. ARDUINO – One of the return value from Example1\_BasicReadings.ino is presenceVal cm^-1 (Serial.print(presen… --- ## [DMX Shield Input](https://community.sparkfun.com/t/dmx-shield-input/67824)
**Author:** [@theorada](https://community.sparkfun.com/u/theorada)\ **Replies:** 1\ **Last updated:** [January 21, 2026, 10:16am UTC](https://community.sparkfun.com/t/dmx-shield-input/67824 "2026-01-21T10:16:17Z")
Hello ! I’m stuck trying to get the DMX shield getting any data on input (using the example 2 of the shield library - DMX Input). My goal is to get the DMX value from a light desk and use it to control led with Fastled. … --- ## [Soft Power Switch Application Help - JST 2mm](https://community.sparkfun.com/t/soft-power-switch-application-help-jst-2mm/67764)
**Author:** [@ApicoNamaco](https://community.sparkfun.com/u/ApicoNamaco)\ **Replies:** 2\ **Last updated:** [January 10, 2026, 7:19am UTC](https://community.sparkfun.com/t/soft-power-switch-application-help-jst-2mm/67764 "2026-01-10T07:19:52Z")
Hello. I would like to use the Soft Power Switch - JST 2mm with the Bluetooth transmitter TSA5001 It has the following functions when button is pressed: Pair button: Long press 3 seconds into searching mode Long pres… --- ## [LTC3588 V\_IN reaches 8V but Vcc remains 0V](https://community.sparkfun.com/t/ltc3588-v-in-reaches-8v-but-vcc-remains-0v/67730)
**Author:** [@soooleh](https://community.sparkfun.com/u/soooleh)\ **Replies:** 5\ **Last updated:** [January 8, 2026, 8:48am UTC](https://community.sparkfun.com/t/ltc3588-v-in-reaches-8v-but-vcc-remains-0v/67730 "2026-01-08T08:48:48Z")
Hi everyone,I’m working with the LTC3588 for a piezoelectric harvesting project. I am encountering a strange issue where I cannot get any output voltage across Vcc and GND. Setup: Source: 4 Piezoelectric disks in series… --- ## [COM-11452 run on 5 volts?](https://community.sparkfun.com/t/com-11452-run-on-5-volts/67701)
**Author:** [@John\_G\_Thompson](https://community.sparkfun.com/u/John_G_Thompson)\ **Replies:** 3\ **Last updated:** [January 2, 2026, 10:47am UTC](https://community.sparkfun.com/t/com-11452-run-on-5-volts/67701 "2026-01-02T10:47:00Z")
The datasheet for the LED is useless. Only information is Voltage - Forward (Vf) (Typ) 4.5V” Not sure if that is okay for USB 5 volts or not. --- ## [Rework Station 8505D error code 5-E (or S-E?)](https://community.sparkfun.com/t/rework-station-8505d-error-code-5-e-or-s-e/67639)
**Author:** [@zachCrafts](https://community.sparkfun.com/u/zachCrafts)\ **Replies:** 1\ **Last updated:** [December 31, 2025, 5:06pm UTC](https://community.sparkfun.com/t/rework-station-8505d-error-code-5-e-or-s-e/67639 "2025-12-31T17:06:23Z")
hello, when trying to use my rework station for the first time i noticed it seemed to be generating heat but not nearly to the desired temperature; after a minute or so of tinkering with the AIR control the heat dropped… --- ## [DMX Shield Logic Converter Does Not Work With WS2813 LED Strip](https://community.sparkfun.com/t/dmx-shield-logic-converter-does-not-work-with-ws2813-led-strip/67669)
**Author:** [@maxroseGIT](https://community.sparkfun.com/u/maxroseGIT)\ **Replies:** 0\ **Last updated:** [December 26, 2025, 12:10pm UTC](https://community.sparkfun.com/t/dmx-shield-logic-converter-does-not-work-with-ws2813-led-strip/67669 "2025-12-26T12:10:01Z")
I have a technical problem with the Sparkfun DMX shield (with ESP32 thing plus) and a addresable LED strip, that involve the wires from shield poke connectors to led strip. When connecting WS2813 led strips to the DMX s… --- ## [Program ATtiny1614 with SparkFun FTDI Basic?](https://community.sparkfun.com/t/program-attiny1614-with-sparkfun-ftdi-basic/67602)
**Author:** [@RossWaddell](https://community.sparkfun.com/u/RossWaddell)\ **Replies:** 5\ **Last updated:** [December 16, 2025, 10:54pm UTC](https://community.sparkfun.com/t/program-attiny1614-with-sparkfun-ftdi-basic/67602 "2025-12-16T22:54:54Z")
Is it possible to program and Serial debug with the SparkFun FTDI Basic Breakout (5V) on an ATtiny1614 chip? The chip is already powered by a 3.3V low-dropout regulator so I think I just need to connect the Tx, Rx and GN… --- ## [Pi5 with red LED glowing, but won't start up](https://community.sparkfun.com/t/pi5-with-red-led-glowing-but-wont-start-up/67508)
**Author:** [@Music1](https://community.sparkfun.com/u/Music1)\ **Replies:** 1\ **Last updated:** [December 16, 2025, 8:20pm UTC](https://community.sparkfun.com/t/pi5-with-red-led-glowing-but-wont-start-up/67508 "2025-12-16T20:20:01Z")
Have had my Sparkfun PI 5 for a while, but just started my music server build. When I try to start it, the red LED glows, but it does nothing. Any thoughts? Thank you! --- ## [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… --- ## [Is the Zio Qwiic OLED display really 128 x 128?](https://community.sparkfun.com/t/is-the-zio-qwiic-oled-display-really-128-x-128/67415)
**Author:** [@C\_K](https://community.sparkfun.com/u/C_K)\ **Replies:** 1\ **Last updated:** [November 22, 2025, 8:18am UTC](https://community.sparkfun.com/t/is-the-zio-qwiic-oled-display-really-128-x-128/67415 "2025-11-22T08:18:40Z")
I am using the u8g2 library to display on the Zio Qwiic OLED Display (1.5inch, 128x128) - SparkFun Electronics . The spec sheet says it’s 128 x 128, but I can only address (and see) 128 width x 96 height. My code is here… --- ## [Qwiic OLED Compile Error](https://community.sparkfun.com/t/qwiic-oled-compile-error/67313)
**Author:** [@CloudInnovations](https://community.sparkfun.com/u/CloudInnovations)\ **Replies:** 3\ **Last updated:** [November 20, 2025, 11:58pm UTC](https://community.sparkfun.com/t/qwiic-oled-compile-error/67313 "2025-11-20T23:58:22Z")
I’m getting an error compiling an OLED sketch in the new Arduino App Lab for the UnoQ. How could this be resolved? I tried installing older versions of the library but that didn’t work. /home/arduino/.arduino15/packages… --- ## [Suggestion - Red Led dot matrix display using 5x7 matrixes (5x14, 5x21, 5x28)](https://community.sparkfun.com/t/suggestion-red-led-dot-matrix-display-using-5x7-matrixes-5x14-5x21-5x28/67390)
**Author:** [@Greg25](https://community.sparkfun.com/u/Greg25)\ **Replies:** 3\ **Last updated:** [November 20, 2025, 10:00pm UTC](https://community.sparkfun.com/t/suggestion-red-led-dot-matrix-display-using-5x7-matrixes-5x14-5x21-5x28/67390 "2025-11-20T22:00:31Z")
Hello, I have a product suggestion. It’s based on my experience with the “Sparkfun 7-Segment Serial Display - Red”. I’ve used it often when prototyping. I use the ttl interface and it runs at 3.0V, which is the voltage … --- ## [MicroView screen goes black but keeps working](https://community.sparkfun.com/t/microview-screen-goes-black-but-keeps-working/67377)
**Author:** [@Lohde](https://community.sparkfun.com/u/Lohde)\ **Replies:** 6\ **Last updated:** [November 20, 2025, 2:08am UTC](https://community.sparkfun.com/t/microview-screen-goes-black-but-keeps-working/67377 "2025-11-20T02:08:53Z")
Hi everyone! I’m on a project where I try to get an old telephone switch (in German “Hebdrehwähler HDW 27”) to work again. I took a SparkFun MicroView, connected an old (modified) telephone (just the wires from the diale… --- ## [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… --- ## [Micro OLED displaying garbled pixels when trying to get example to run](https://community.sparkfun.com/t/micro-oled-displaying-garbled-pixels-when-trying-to-get-example-to-run/65452)
**Author:** [@v1ckery](https://community.sparkfun.com/u/v1ckery)\ **Replies:** 22\ **Last updated:** [October 24, 2025, 5:54pm UTC](https://community.sparkfun.com/t/micro-oled-displaying-garbled-pixels-when-trying-to-get-example-to-run/65452 "2025-10-24T17:54:33Z")
I’m using a ESP32 Thing Plus-S3 and a Qwiic connector to get the Micro OLED breakout working. However, when I tried running the example sketch, the following displays. I thought at first it was the random pixel funct… --- ## [TRMNL Programming](https://community.sparkfun.com/t/trmnl-programming/67104)
**Author:** [@CloudInnovations](https://community.sparkfun.com/u/CloudInnovations)\ **Replies:** 8\ **Last updated:** [October 17, 2025, 4:03pm UTC](https://community.sparkfun.com/t/trmnl-programming/67104 "2025-10-17T16:03:32Z")
Hi, I don’t see anything in the TRMNL screen documentation. Can it be programmed with Arduino? --- ## [Heart Rate Display on Glasses](https://community.sparkfun.com/t/heart-rate-display-on-glasses/67122)
**Author:** [@tlsmith0831](https://community.sparkfun.com/u/tlsmith0831)\ **Replies:** 3\ **Last updated:** [October 17, 2025, 4:02pm UTC](https://community.sparkfun.com/t/heart-rate-display-on-glasses/67122 "2025-10-17T16:02:50Z")
I’m currently working on a project that will display my heart rate (and hopefully pace and distance) on my glasses. I bought the ESP32 Qwiic Pro Mini, and the Micro OLED Breakout Qwiic. In order to connect this to my com… --- ## [SparkFun Buck-Boost converter failing with 14.5v or higher](https://community.sparkfun.com/t/sparkfun-buck-boost-converter-failing-with-14-5v-or-higher/67098)
**Author:** [@174racer](https://community.sparkfun.com/u/174racer)\ **Replies:** 1\ **Last updated:** [October 15, 2025, 12:00am UTC](https://community.sparkfun.com/t/sparkfun-buck-boost-converter-failing-with-14-5v-or-higher/67098 "2025-10-15T00:00:42Z")
Hey guys, we are building some devices for vehicles, and using the Buck-Boost converter (COM-15208) to step down power from 12v-14V switched battery power to 5V to power a Raspberry Pi Zero. This unit is rated to accept… --- ## [SparkFun Buck-Boost Converter silkscreen error](https://community.sparkfun.com/t/sparkfun-buck-boost-converter-silkscreen-error/67006)
**Author:** [@jmforem](https://community.sparkfun.com/u/jmforem)\ **Replies:** 1\ **Last updated:** [October 1, 2025, 10:21pm UTC](https://community.sparkfun.com/t/sparkfun-buck-boost-converter-silkscreen-error/67006 "2025-10-01T22:21:28Z")
On the SparkFun Buck-Boost Converter board, the enable input is labeled EN with a line over it. A line over a logic identifier mean NOT, or active low. So a line over EN means EN (enable) is active low, in other words … [Previous page](https://community.sparkfun.com/c/components-and-accessories/121.md) [Next page](https://community.sparkfun.com/c/components-and-accessories/121.md?page=2)