5pcs Lm358 Diy Kit 9v/12v Dc Accumulator Low-voltage/undervoltage Protection

US $170

Shenzhen, China
Oct 21st

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Click to Enlarge Click to Enlarge Click to Enlarge Click to Enlarge Click to Enlarge New Arrivals Modules Home Gadgets Fishing Outdoor Product Picture Gallery Power Module Wireless Modules Sensor DIY LED Board Development Board Function Modules Digital Voltmeter Description Features: ?The use of accumulator power causes the output voltage decreases,if the accumulator in low voltage for a long time,it will damaged.This suite can be used of testing 9V/12V accumulator output voltage,when accumulator in low voltage/under voltage,the red indicator lights up and the buzzer calls,which realized sound-light alarm,in order to achieve mastering accumulator discharging status. 1.Principle description This suite has simple circuit and uses the LM358 chip,it used as voltage comparator.The comparison value is setted by potentiometer.When the input voltage is reduced to the setted value,the transistor turned on , LED lights, the buzzer calls. 2.Electrical Characteristics Operating Voltage?9v/12v DC Main chip:LM358 PCB size:32*26.7mm 3.Schematic diagram 6.Welding note Because of putting the silk print in a wrong place when designing. ?9014? is placed the S8550 transistor(the suite only has S8550 transistor,hasn?t S9014 transistor), the positive and negative of buzzer is as showing : 7.Instructions 1.Wedding the component correctly,"IN+" and "IN-" link to the positive and negative of 8V/10.4V power Adjusting the potentiometer, when LED lights up, the buzzer calls, then stop adjusting potentiometer Using the "IN +" and "IN-" to link with the positive and negative of 9V / 12V power, when the voltage is lower than 8V / 10.4V, LED lights up,the buzzer calls. Shippment Payment Return Policy Feedback About us We will arrange shipping for you within 24 Hours after payment cleared except the holidays. We only ship to the confirmed address provided by PayPal. Before you pay, please make sure your address in PayPal matches the address you would like us to ship to. If not, please let us know before we sent you the package, or we will not be responsible for any loss. hope you could understand. -We ship items to Worldwide. Thank you! -we will ship out the order in 1-2 business days after payment cleared .Since it is international shipping ,delivery time is about 15--28 business days to arrive to most countries. We accept Paypal ONLY. It is easy and safe for you to pay by credit cards, debit cards, bank transfers and PayPal account balances. * We believe our items are so outstanding. We are convinced you will be happy with your Purchase. * If you do not satisfy with our items. Please simply return to us within 30 Days in original condition. Just pay for the returned postage. Then we can issue full refund to you after the returned item arrived at our warehouse. * Please include your eBay ID and item number with any email requests. * When you satisfied with our product and services please leave us positive feedback. * If you have got the package, please confirm "Delivery on time" For us. * If a problem occurs, contact us immediately with any email request. * Just contact us using the " Ask the seller a question" link on eBay. We mainly sell Modules, IC Acccesories, Home Gadgets, and outdoor products. Almost all products you need, You can get a best price once you send us the ebay message. For bulk order or wholesale, we promise to offer you a very competitive price! We welcome do more pleasant business with you. SKYPE: ada-yu2013 inkfrog terapeak inkFrog Analytics