# \#schematic-diagram

**URL:** https://sierraconnect.protoexpress.com/tag/schematic-diagram/19.md

[Latest](https://sierraconnect.protoexpress.com/latest.md) · [Categories](https://sierraconnect.protoexpress.com/categories.md) · [Tags](https://sierraconnect.protoexpress.com/tags.md)

---

## [AC Dimmer (FL5150) Controlled by Low-Power MCU – Grounding and Isolation](https://sierraconnect.protoexpress.com/t/ac-dimmer-fl5150-controlled-by-low-power-mcu-grounding-and-isolation/3949)

<div class="topic-metadata">

**Author:** [@rayansayedpd](https://sierraconnect.protoexpress.com/u/rayansayedpd)\
**Replies:** 1\
**Last updated:** [April 14, 2026, 2:26pm UTC](https://sierraconnect.protoexpress.com/t/ac-dimmer-fl5150-controlled-by-low-power-mcu-grounding-and-isolation/3949 "2026-04-14T14:26:22Z")

</div>

I am trying to design an AC dimmer using the FL5150, based on the datasheet reference circuit. I want to control it using a 3.3V MCU: PWM → for dimming control GPIO → for mode selection My main doubts 1. Groun…

---

## [Noticed a Difference in Power Section – Is It Okay to Skip LNK1/LNK2?](https://sierraconnect.protoexpress.com/t/noticed-a-difference-in-power-section-is-it-okay-to-skip-lnk1-lnk2/3400)

<div class="topic-metadata">

**Author:** [@rayansayedpd](https://sierraconnect.protoexpress.com/u/rayansayedpd)\
**Replies:** 4\
**Last updated:** [July 31, 2025, 10:18am UTC](https://sierraconnect.protoexpress.com/t/noticed-a-difference-in-power-section-is-it-okay-to-skip-lnk1-lnk2/3400 "2025-07-31T10:18:59Z")

</div>

During the final review of my custom board schematic, I noticed something in the development board reference schematic that I had completely missed earlier — two labels: LNK1 and LNK2, connected to the PMIC outputs for V…

---

## [How Should I Protect a 12V DC Input in Schematic Capture?](https://sierraconnect.protoexpress.com/t/how-should-i-protect-a-12v-dc-input-in-schematic-capture/3070)

<div class="topic-metadata">

**Author:** [@rayansayedpd](https://sierraconnect.protoexpress.com/u/rayansayedpd)\
**Replies:** 3\
**Last updated:** [April 14, 2025, 8:11am UTC](https://sierraconnect.protoexpress.com/t/how-should-i-protect-a-12v-dc-input-in-schematic-capture/3070 "2025-04-14T08:11:42Z")

</div>

Hi! I’m working on my first custom board that’s powered by either a 12V battery or a DC barrel jack. While I have some experience with PCB layout, I’m still new to schematic capture, and I’m unsure about how to properly…

---

## [What's the Meaning of Schematic Diagram?](https://sierraconnect.protoexpress.com/t/whats-the-meaning-of-schematic-diagram/159)

<div class="topic-metadata">

**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\
**Replies:** 0\
**Last updated:** [September 28, 2023, 6:32pm UTC](https://sierraconnect.protoexpress.com/t/whats-the-meaning-of-schematic-diagram/159 "2023-09-28T18:32:46Z")

</div>

Originally published at: https://www.protoexpress.com/blog/whats-the-meaning-of-schematic-diagram/ A schematic diagram is a fundamental two-dimensional circuit representation showing the functionality and connectivi…