![]() ![]() There are several ways to reduce the overall power used by the circuit. LED Display - Adjustable maximum voltage level - Adjustable minimum voltage level - 3 Adjustable alarms (typically 50%, 30%, 20%) - Alarms to be non-irritating, and have a mute function - Minimum buttons - Low power consumptionįor my design, I opted for the AtMega328P micro. The aim was then to design a battery indicator with the following specifications: With a standard LM3914 battery monitor, the battery monitor itself will drain a 7Ah battery in about 46 hours. Lastly, the current drawn by circuits I have tested, ranged between 45mA and 150mA. However, add a second or third warning, this can become a problem. Using pots for adjustments, is the normal method used. If a low level warning is also required, this will then result in three voltage levels to be monitored. The biggest difference is the required minimum and maximum voltage to be displayed. However, each person wants something a little different. If you want to take care of your batteries, extend their lifetime and save money investing in a meter or monitor as part of your system is undoubtedly the way to go.With the use of 12V batteries becoming more popular (typically the 7Ah sealed lead acid), I have been requested several times to build a state of charge (SOC) meter displaying the voltage on LEDs. With a high end monitor, you no longer have to manually determine your power use, so it’s easy to assess the load on your system and prevent harmful battery discharge or failure. A “fuel gauge” status bar shows your remaining power, while a “power measurement” function (voltage times current) instantly calculates watts. If you’re running lights, fridges or a compressor off your battery, these high-end monitors place incredibly useful information at your fingertips. High-end monitors such as the VICTRON BMV 700 are driven by powerful microprocessors and super-accurate shunt technology, and deliver precision monitoring using a simple push button display. If you want to remove all guesswork from the picture, then a top of the line monitor that’s packed with features can be the ultimate battery monitor and the best option to suit your needs. They also monitor12 or 24 volts and have a compact surface mount design that provides a two line LCD 3 digital display with an on/off back light. These give you a flexible range of combinations to choose from – Volt/Amp, Volt/Volt and Amp/Amp – which means finding one to suit your needs is no problem. Features like this can be seen in products such as the Baintech Surface/Flush Mount LCD DC Volt Meter.įor a more versatile meter you can consider Volt and Amp Meters such as the Baintech Volt and Amp Meter. Another couple of features that go a long way to ensuring you maintain control is a built-in low voltage alarm, which alerts you to poor battery performance and reverse polarity protection which helps prevent damaging your gear. Features such as these mean you will have no dramas monitoring your battery’s power load. Look for a Volt Meter that offers a big, bright and easy-to-read LED display, such as the Baintech LED DC Volt Meter Rectangle. If you want an inexpensive, easy-to-install option, this is the one to choose. But, where should you start?Ī DC 12V Volt Meter will give you an accurate reading of the current voltage on your battery. From simple and inexpensive DC 12V Meters to Volt/Amp Meters or a battery monitor with all the bells and whistles, there’s plenty of options to suit your needs and price tag.īainbridge Technologies has Australia’s largest range of battery meters and monitors: single meters, double meters, surface and flush mount, even embedded in power panels to give you the versatility of sockets. From the Kimberly to Fraser Island, it doesn’t matter if you’re long range touring, or taking a weekend break, a flat or deeply discharged battery will ruin your plans and hit your back pocket.īy monitoring your power use you can easily avoid the hassle of a drained battery. ![]()
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