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Sender: "piclist-bounces@mit.edu" Date: Wed, 2 Sep 2020 12:49:40 -0700 Subject: Re: [EE] High Side LCD Backlight Control Thread-Topic: [EE] High Side LCD Backlight Control Thread-Index: AdaBY8FDVk3aLpSxQw6tZz+TaxZBPQ== Message-ID: References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of gmail.com designates 209.85.166.179 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.166.179; helo=mail-il1-f179.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=eHS4AheHplWpOljuylsBSAFyOUCh7nq8zxNGA1PM+2Y=; b=a6U8Ti0Ol4qRDPr7Z7JNiiCzaO1V9c/ReykM6SZYViNFab6GDIaq3wMt5AY/4Jyq0/ UanyLFNE7WXZq6L8cm269C5HG+O7NPikA1pkmFr8LB9L+VQl8ghpSMAyHaq9riqBbsJY 900rN764ti09A0mpVYyJc060LgFhWVhyaZvYtu2Pu7/fTnkYaCAqDrPyxJfrFhvhdZ7W ASCcSr3ErZ+564y+4HMfFnnXFL7I+Pe6zLt0wilPaZ4ANmLqai7Jh0L6enJ2ng+8q53q dbb+7dkN2KKiOPisASOGgn/dGJ3LQpiO4cgc9DJhQQfzVfguRTcbcP1jnxGgT5BrY8zL M1Uw== authentication-results: spf=pass (sender IP is 209.85.166.179) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=gmail.com; mit.edu; dmarc=pass action=none header.from=gmail.com; errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:a92:1bd8:: with SMTP id f85mr2470400ill.262.1599076206931; Wed, 02 Sep 2020 12:50:06 -0700 (PDT) x-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 On Sat, Aug 29, 2020 at 8:50 PM Bob Blick wrote: > Simplest is a P-channel Mosfet, recommend something from Alpha and Omega = Semiconductor, part number AO3-something. > Cheapest solution is probably a PNP transistor with a base resistor. > Either will be fine. Hard to say which I'd choose. Both will invert, so 0= is ON. Hi Bob, I'm leaning towards a P-channel MOSFET. I had forgotten about A&O, I will check out their offerings! Would I need a gate resistor? I have very little experience with P-channel parts. Thanks, Josh --=20 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .