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[49.180.229.154]) by smtp.gmail.com with ESMTPSA id 64sm3526536pfd.174.2021.03.18.19.00.31 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Thu, 18 Mar 2021 19:00:31 -0700 (PDT) Received: from james by esk with local (Exim 4.90_1) (envelope-from ) id 1lN4R9-0004z8-6u; Fri, 19 Mar 2021 13:00:27 +1100 From: James Cameron To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Thu, 18 Mar 2021 19:00:27 -0700 Subject: Re: [EE]: Battery eliminator for Solar powered pond pump and slowly rising Vin issues Thread-Topic: [EE]: Battery eliminator for Solar powered pond pump and slowly rising Vin issues Thread-Index: AdccZRx2DHR4NTNlRlO0e1gmhToaEA== Message-ID: <20210319020027.GD28416@laptop.org> 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 laptop.org designates 209.85.215.169 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.215.169; helo=mail-pg1-f169.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=laptop.org; s=google; h=date:from:to:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=fvG1pD62nS/7Jx3ZXK23U8Al7h+47ZxAitR6kTkd71k=; b=yYSJg7K62S60baAq5h5qYG9f2dEkJFdkogOdPkDOtzNqLEa3GDnax/k7LowdtASL48 4rTbGt23s9AkdrontwEakOP249ZTfHmLueDUMD5sPx4TjjnYGCcZt99bCTtequSarcu4 +1tsNYaQEwi9gJ6gOmPJurzFAV+6voPGsb48Y= authentication-results: spf=pass (sender IP is 209.85.215.169) smtp.mailfrom=laptop.org; mit.edu; dkim=pass (signature was verified) header.d=laptop.org; mit.edu; dmarc=pass action=none header.from=laptop.org; user-agent: Mutt/1.9.4 (2018-02-28) 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:a62:3706:0:b029:211:3d70:a55a with SMTP id e6-20020a6237060000b02902113d70a55amr4123575pfa.16.1616119231865; Thu, 18 Mar 2021 19:00:31 -0700 (PDT) x-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 I've seen this myself. I've heard others say to treat the panel as a current source rather than a voltage source. I've just avoided it. For all my solar powered projects that have pic, esp8266 or atmega328, I've used a battery. Even a particularly old and unhealthy battery. --=20 James Cameron https://quozl.linux.org.au/ --=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 .