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- 7-Segment Display - 4-Digit (White) (single header)
7-Segment Display - 4-Digit (White) (single header)
This is a basic, 4-digit 7-segment display - white in color. It has a common anode. The display features one decimal point per digit, and individually controllable apostrophe and colon points.
The LEDs have a forward voltage of 1.9VDC and a max forward current of 20mA. The hardware interface is sixteen through-hole pins in one row.
Note: Due to a supplier mix-up we got these 7-seg displays with one row of pins instead of our normal version with two rows of pins. We will not be stocking these displays again once they are gone, unless you beg us to.
- Overall Display: 40.18 x 12.8 mm (1.58 x 0.50")
- Digit Height: 10mm (0.39")
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OK, the good news is, they work :) (well, the one I've tried so far...) They are common anode as described. The bad news is: No decimal points. You get the clock "colon" separator, but no individual DPs. Shame, they'd have been useful. And no "apostrophe" dot either, copy & paste error there Mr Sparkfun...
Pin-out is as follows (1-13): Digit 1, 2,3,4 then segments a, b, c, d, e, f, g. upper dot, lower dot.
The dots "belong" to digits 2 (upper) and 3 (lower), i.e. +ve to pin 2, gnd to pin 12 = upper dot lit; +ve to pin 3, gnd to pin 13 = lower dot lit.
Time to hook up a couple of shift registers & make these suckers do something :)
EDIT: Threw together a quick circuit, works nicely :)
Also note that when looking from the front of the display with the headers at the top, pin one, as described here, is to the far right.
1/3 the price for something that's even easier to hang off a breadboard.. yes please!
Okay, did not know that, shame.... maybe hotglue a piece prototype pcb+male pinheader (+flatcable) is a solution.... ....or some periscope mirror config :)
Even better this way . . . bent the wires, and you have standing display on a pcb
I thought this too & bought a pile of them... unfortunately the pins are at the top of the display & not the bottom; so you'd need to mount your PCB upside down (or have the display holes right on the edge & mount the PCB behind the unit) to get the digits the right way up.
They're still a bargain though...
Edit: Thinking about it... since the decimal points don't work, you could easily mount the displays "upside down", thus standing them on a PCB as you desire :)