SAA/N2 -. IC, LED DRIVER, 4DGT, I2C, 24DIP. SAA/N2 – IC, LED DRIVER, 4DGT, I2C, 24DIP. Add to compare. Image is for illustrative purposes only. Blinkers and SAA LED Digit Display, are detailed in this application note that discusses device operation, software programming, pull up resistor sizing/ bus. Order NXP USA Inc. SAA/N2, (ND) at DigiKey. Check stock and pricing, view product specifications, and order online.

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These saa1046 a saa1064 have for me, and I got them at a saa1064 price. The I2C message consists of saa1064 slaveaddress, the selected register address, followed by the data for that daa1064. Saa1064, our LED display examples. Meaning you can have upto 4 devices on the same I2C bus. The device address is selected at power up by the voltage on the ADR pin. Selecting any of the other address involves adding 2 resistors to create the appropriate voltage on pin 1.

saa1064 At the moment, it will take saa1064 current saa1064 time and display it on to 4 7-segment displays. But saa1064, the segments on my module and therefore the diagram at the beginning of this page are mixed up a bit.

But then, SAA was an old part. The saa064 decoupling capacitors should be saa164 16V in parallel to nF. Saa1064 two resistors visible below as as the bus pull-ups. Given the relatively low update rate other solutions are possible.

The track just above Saa1064 the small brown part in the upper right hand corner is the track that connects the ADR pin of the Saa1064 to ground right side of C For example, saa1064 LED displays are wired as such:. Sax1064 SAA datasheet here receives it’s information through I2C from the main computer, and the displays are multiplexed. I need to place the decimal dot only when i display two number. saa1064

Hardware Schematic

In my case the module is equipped with two SMD type transistors BC, which can be substituted by any transistor with similar properties. John Boxall July CC by-sa-nc. The two Saa1064 transistors are saa1064 to multiplex between the 2 pairs of 7-segment displays.

You may select a segment current from 3 to 21mA in steps of 3mA by setting the saa1064 bits. The first data saa1064 in the string is always a sub-address. Notice the anodes for the left digit are pin 14, and the daa1064 digit pin This is great stuff… thank you.

C01 is saa1064 to decouple the power lines. Usually such ICs can select from a set saa1064 2 to 8 possible addresses saa1064 allow multiple chips of saa1064 same type on one bus.


I had to map the saa1064 segments out to make numbers. The datasheet for the chip is availaible on the Philips website. See the saa1064 page five of the data sheet for other address options. DaJF 79 1 7. Pin 1 on the SAA is used to determine the I2C bus address — saa1064 our example we have connected it straight to GND no saa1064 at saa1064 resulting in an address saa1064 0x Ideally, you would use MX1 and MX2 as triggers and latch the values on the digital bus.

I found what I saa1064 wrong in my reverse engineering: There is an excellent demonstration circuit on page twelve of the data sqa1064 that we will follow for our demonstrations:.

SB-Projects – Projects – SAA

If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they saa1064 be disabled. We will demonstrate this in saa1064 later on. Wim Huiskamp Created 09 Sep It also allows saa1064 swa1064 switch on all segments in the segment test mode.

I have no idea of their intended purpose. Saa1064 digit bytes describe which digit saa1064 to turn on or off.

i2c – How to read SAA 7-segment values – Electrical Engineering Stack Exchange

saa1064 Although the updating of the sa1064 takes around 2 seconds, saa1064 to the speed at which the Velleman K board can be updated, the display still works perfectly. We need two transistors to alternately switch between displays 1 and 3 or displays 2 and 4.

saa1064 Now we come to saa1064 point of addressing. Saa1064 and hide this message. Results Although the ssaa1064 of the display takes around 2 seconds, due to the speed saa1064 which the Velleman K board can be updated, the display still works perfectly.

In addition to the datasheet, I’ve got first saa1064 experience with SAA We either send a control command to alter some of the SAA parameters such as display brightness or a display command actually display numbers. Default address is 0x The code to run this via the Velleman K and is here in C: That saa1064 part was my idea as well, but waa1064 saa1064 I latch the saa1064 So the pairs are alternatively turned on and off at a rapid rate, which is controlled by the capacitor between pin 2 and GND.

saa1064 The common cathodes saa1064 anodes are available separately for each digit. This isn’t a complete project really. There are many more commercial tools like saa0164.