LM3914N-1 – Bar Graph LED Driver
£0.50
LM3914N-1 – Bar Graph LED Driver
With this chip, all it takes is a single, analog signal to drive a string of 10+ LEDs, which can be configured into either bar mode (where all LEDs below a certain point turn on) or dot mode (with only a single LED on at a time).
Hook them up properly, and you can create all sorts of nifty multi-LED displays, like an audio-visualizing VU meter.
10 in stock
LM3914N-1 – Bar Graph LED Driver
With this chip, all it takes is a single, analog signal to drive a string of 10+ LEDs, which can be configured into either bar mode (where all LEDs below a certain point turn on) or dot mode (with only a single LED on at a time).
Hook them up properly, and you can create all sorts of nifty multi-LED displays, like an audio-visualizing VU meter.
LM3914N-1 Pin Configuration:
| Pin # | Pin Name | Pin Function | Pin # | Pin Name | Pin Function | |
| 1 |
LED 1 |
First (lowest value) LED |
18 |
LED 2 |
2nd LED |
|
| 2 |
V− |
Ground |
17 |
LED 3 |
3rd LED |
|
| 3 |
V+ |
Supply voltage (3-25V) |
16 |
LED 4 |
4th LED |
|
| 4 |
RLO |
Divider low voltage |
15 |
LED 5 |
5th LED |
|
| 5 |
Signal In |
Analog signal in |
14 |
LED 6 |
6th LED |
|
| 6 |
RHI |
Divider high voltage |
13 |
LED 7 |
7th LED |
|
| 7 |
Ref Out |
Reference output voltage |
12 |
LED 8 |
8th LED |
|
| 8 |
Ref Adj |
Voltage reference adjust |
11 |
LED 9 |
9th LED |
|
| 9 |
Mode |
Dot/Bar mode select |
10 |
LED 10 |
Last (highest analog input) LED |
Specifications:
- 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 30mA
- 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.
Very Important: Please make sure you double check the polarity of all connections before attaching any power.
Please Note: DIY electronics are meant for those with basic electrical knowledge and soldering skills.
Before placing your order, please make sure you are fully aware of the Shipping Policy.
Datasheet
Click to View the LM3914N Datasheet
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