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Welcome to 2016! This seven-segment display, executed in origami, shows the current year, and is folded from a single sheet of Elephant Hide paper. With a little work, each segment’s on-off state can be toggled, so you can update the number next year without having to refold the whole thing. It’s probably too slow a process to qualify as action origami, though.
Individual segment design is based on Fujimoto’s Hydrangea (level 0) while the idea of using them to simulate a digital 7-segment display is mine. Others have probably also come up with it as it comes as an obvious thing when one starts folding tiled Hydrangeas.
A 64×32 grid was used. Only 26 grid units vertically are needed for the digits — the remaining 6 make up the foot which allows the tessellation to stand vertically for better viewing.
App is available at Google play:
play.google.com/store/apps/details?id=air.SlideCubepuzzle
3x3, 3D printable version is available at tinkercad:
www.tinkercad.com/things/f9JSRcHARTX
and
App is available at Google play:
play.google.com/store/apps/details?id=air.SlideCubepuzzle
3x3, 3D printable version is available at tinkercad:
www.tinkercad.com/things/f9JSRcHARTX
and
X-Ray of the display section and part of the keypad of a Rockwell 18R pocket electronic calculator from about 1974.
The digits were on the small squares and formed of a surprisingly complex arrangement of tiny LEDs, all connected to the support circuit board via hair-thin bond wires.
Adafruit backpack modules (well, standalone modules).
Using i2c and the adafruit API makes it simple and easy.
The center module is a GPS receiver; $20 on ebay. speaks 9600 TTL serial, standard ascii '$..*,HH' NMEA format.
the 7segment on the left displays local time and the alpha on the right UTC.
I'm also comparing the look of the two, if the data to be displayed is pure numbers and no alpha. so far, the pure number use-case wins big on the left display and not so great on the right. if you have to display letters, the right is your only choice, but if you only display numbers, the left is much better.
photo note: somewhat challenging since the display is very bright. my color balance is way off, but I did what I could in post. in a real system, the display modules would be behind a red or tinted plastic window and the contrast will be much nice, hiding the unlit segments.
An arduino nano (left, with bright blue light) being the controller in this setup. adafruit 7-seg LED backpack module (i2c, 5v) is the display. there are 2 xbees: one on usb, inside the plastic box (top) and one on the proto board with the bright red led. on the bottom of the board is an ftdi-like (lol) usb/serial ttl 5v/3.3v board. upper top is a cheap ebay rotary encoder with plastic knob.
I'm testing out some code to read the encoder, write to the numeric display and update values over xbee radios. the bottom serial board can be used to sniff the traffic or you can use the xbee to send data to its peer. the output is ascii and you can watch it via 'putty' on windows or any term program you want.
both the ftdi board and the xbee are on software-serial arduino pins and I limited the speed to 19200 for that reason.
for short distances, so far its pretty responsive. the encoder works well, the arduino scans it fast enough to not miss any turn events and the led display is sharp, bright and also very fast to update/write to.
While working on the design I tweaked the idea to make a birthday card for my sister. The disks "rotate" to spell HAPPY in a 7-segment style font.
Assembling the gears and disks and just sitting the segment disks on top as a sanity check. Wheels in the '4' position (see next image).
The other night I woke at five minutes after five in the morning. My alarm clock was obviously in need of help...
S.O.S.
Top: A digital with vintage LED 7-Segment display HP 5082-7414
Bottom: I use 2 of 2-digit Red LED 7-Segment to make a simple digital clock (watch). These LED 7-Segment displays are vintage and not available from electronics shops anymore.
More detail at picnote.blogspot.com
(With birdsong!)
It's relatively simple (3 moving parts) and importantly is all in one plane. Laser cut parts and 3D-Printed mounting brackets.
This is just a proof-of-concept, but the idea is to tweak it a little (reduce parallax effect) and then drive it with a servo.
All working apart from the Jenway 7000 in the lower left. Large one top right is a digital voltmeter made by Strainstall, and reads zero with no input.
The finished digital clock with 7-segment led-displays controlled by a attiny2313.
More at blog.gut-man.de/tag/7-segment/
Digital clock with 7-segment led-displays controlled by a attiny2313 on a breadboard.
More at blog.gut-man.de/tag/7-segment/
Multiplexing the segments in a 7-Segment LED display with a 74HC595 shift register and 3 wires from an Arduino.
Yes, this is not necessarily the best way to make a 7-Segment display count, but it was more of an academic challenge to see how it could be done. For details of this project please visit my blog.
Multiplexing the segments in a 7-Segment LED display with a 74HC595 shift register and 3 wires from an Arduino.
Yes, this is not necessarily the best way to make a 7-Segment display count, but it was more of an academic challenge to see how it could be done. For details of this project please visit my blog.
Using the Arduino to control a 7-segment LED via a 3:8 multiplexer. Rapidly switching between lit segments allows for the display of individual characters. See an annotated version of a similar circuit. NB: the DIP switch shown here is not actually hooked up. The Arduino's taken its place as inputs to the decoder.
You can see video of this setup spelling out the world 'hello' and one of it being used with different software to animate a single segment around the display, as well.
It was really cool to see this mechanical display (the precursor to LEDs). Alexander was super nice to talk to. Here's a link to his video of the display working www.youtube.com/watch?v=tyijTDuotu4
Samples of Led #7segment Single Red/Yellow/Green/White Color outdoor IP65 #digits #digitmodule #Leddots #decimal #points These #digits which can make #gaspricesign #digitalclock #parkingsign #digitalproducts #digitaldisplay Pls call us today & learn more from us by WhatsApp : +86-1314 888 6872 www.winghangsigns.com
Multiplexing the segments in a 7-Segment LED display with a 74HC595 shift register and 3 wires from an Arduino.
Yes, this is not necessarily the best way to make a 7-Segment display count, but it was more of an academic challenge to see how it could be done. For details of this project please visit my blog.
This 7-Segment Digital Clock is controlled by PIC16F627A. More detail check out picnote.blogspot.com
This is an unusual clock - a "vane display" clock (here showing the temperature) - it uses a classic 7-segment display but made from individual solenoid-activated "vanes" and it makes a soft flick-flick-flick-flick noise when it changes.
It all seems so remarkably complex and yet most people probably wouldn't notice it much.
The 8-digit LED display (with 8 red/green LEDs and 8 buttons) shows the X,Y coordinates of the plotter. The plotter is connected via the MAX232A chip on the solderless breadboard.
Digital clock with 7-segment led-displays controlled by a attiny2313 on a breadboard.
More at blog.gut-man.de/tag/7-segment/
The display PCB of an old Mitel telephone switchboard. Some of the LED arrays are already removed from their sockets, along with some of the 7-segment displays.
Now, what can I make out of them?
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I didn't want to disassemble the display so I made the front brackets seat behind the screw heads (they just needed to be loosened a little).
This was my first use of Ponoko to laser cut the parts. I wrote several hundred lines of Python running as an Extension in Inkscape to produce templates in Acrylic, Styrene and Card.
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Left: HP-5082-7414 : 4-digit Led 7-Segment from HP
Right: 2-digit Led 7-Segment from unknown maker
More detail at picnote.blogspot.com
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