LM3914 Dot/Bar Display Driver DIP-18 package

The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display. A single pin changes the display from a moving dot to a bar graph. Current drive to the LEDs is regulated and programmable, eliminating the need for resistors. This feature is one that allows operation of the whole system from less than 3V. The circuit contains its own adjustable reference and accurate 10-step voltage divider. The low-bias-current input buffer accepts signals down to ground, or V− , yet needs no protection against inputs of 35V above or below ground. The buffer drives 10 individual comparators referenced to the precision divider. Indication non-linearity can thus be held typically to 1⁄2%, even over a wide temperature range. Versatility was designed into the LM3914 so that controller, visual alarm, and expanded scale functions are easily added on to the display system. The circuit can drive LEDs of many colors, or low-current incandescent lamps. Many LM3914s can be “chained” to form displays of 20 to over 100 segments. Both ends of the voltage divider are externally available so that 2 drivers can be made into a zero-center meter. The LM3914 is very easy to apply as an analog meter circuit. A 1.2V full-scale meter requires only 1 resistor and a single 3V to 15V supply in addition to the 10 display LEDs. If the 1 resistor is a pot, it becomes the LED brightness control. The simplified block diagram illustrates this extremely simple external circuitry. When in the dot mode, there is a small amount of overlap or “fade” (about 1 mV) between segments. This assures that at no time will all LEDs be “OFF”, and thus any ambiguous display is avoided. Various novel displays are possible

Drives LEDs, LCDs or vacuum fluorescents

Bar or dot display mode externally selectable by user

Expandable to displays of 100 steps

Internal voltage reference from 1.2V to 12V

Operates with single supply of less than 3V

Inputs operate down to ground

Output current programmable from 2 mA to 30 mA

No multiplex switching or interaction between outputs

Input withstands ±35V without damage or false outputs

LED driver outputs are current regulated, open-collectors

Outputs can interface with TTL or CMOS logic

The internal 10-step divider is floating and can be referenced to a wide range of voltages

SHIPPING:

1. We will ship the same day if the product is order after shipping cutoff time then it will dispatched next day.
2. we will ship the product with random available courior partner.
3. we will not refund the shipping amount in case of invalid phone no , invalid address.
4. Domestic shipping is weight-based and starts at Rs 60 for least weight, local delivery items.
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7. we will deliver the product in different city according to the below chart

Delivery:

1. We ship orders as soon as possible, and only after we receive the complete payment.
2. Typically items in stock, are shipped within the next 8 business hours.
3. However, items not in stock can take anywhere between 1 to 10 working days to ship depending on the status of design, production, or delivery of the items from the manufacturer, importer or exporter, publisher, etc. Customers are expected to check the status of items and contact us in case the items are in “out-of-stock” status to get a better picture of the delivery timelines.
4. Despite whatever we may say, there always can be situations beyond our control, when delivery won’t be possible as planned or communicated. We cannot be held responsible for any losses arising out of such delays.

Return Policy:

Standard Return Period

• Time Frame: Items can be returned within 7 days of purchase.

Condition of Items

• Original Condition: Items must be returned in their original condition with all accessories, packaging, and manuals.
• Restocking Fees: A restocking fee of 15% will apply to opened items, except for defective products.

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Types of Returns

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Methods of Refund

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• Store Credit: In cases where a receipt is not available, refunds may be given as store credit.

Online Purchases

• Return Shipping: Customers are responsible for return shipping costs unless the item is defective or the store offers free returns.
• In-Store Returns: Online purchases can be returned in-store with proof of purchase.

Exceptions and Special Cases

• Clearance and Final Sale Items: These items are not eligible for returns or exchanges.
• Price Adjustments: If an item goes on sale within 7 days of your purchase, we offer a price adjustment upon request.