View allAll Photos Tagged 7segment
Over the christmas break, I've been messing around with Kicad. I've been wanting to make a clock for a while now and figured it would be a good excuse to learn a new schematic and PCB design program. It's not that bad after getting used to it. The autorouter is pretty useless and I ended up routing everything by hand.
I will be sending this off for manufacture soon and ordering all the parts to populate it. This board will be about 7.5 x 2.3 inches with the digits being 1" high, and it will rest between a few sheets of lexan.
Doubled-up for extra strength. Nylon machine screws as the axles because it was convenient. This is only a proof-of-concept!
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MY home made 7 segment LED clock. Digits are 1" high. Code written using the Arduino IDE. Compile on an Arduino board, AtMega168 transferred to a custom runtime board using a 32kHz watch crystal.
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
Plante poilue,à tiges dressées ou étalées, rameuse.
Feuilles au contour circulaire, très divisées en 5-7segments lobés pétiolés.
Fleur pourpre rougeâtre vif, 25-30mm de diamètre, souvent solitaire, parfois par 2 à pédoncule velu.
Fruit terminé en bec ,se détachant en 5 parties contenant chacune une graine.
On le trouve en des lieux caillouteux , forêts claires, et parfois dunes, sur sols basiques, à basse altitude et en montagne jusqu'à1900m.
Futaba vacuum fluorescent display tubes in a Busicom 162-DE desktop calculator, 1972. Unlike modern 7-segment displays, these tubes actually feature 8 segments, giving the digit 4 its distinctive shape.
Fluorescenčný 7-segmentový VFD displej ruskej produkcie prekalkulátory.
VFD svieti veľmi príjemnou zeleno-modrou (tyrkysovou)farbou.
Výborná viditeľnosť za zhoršených svetelných podmienokpredurčuje tieto displeje pre domáce interiérové zariadenia ako napríkladhodiny, budíky a pod.
* Typ: IVL1–8/13 ( ИВЛ1–8/13 )
* Farba:zeleno-modrá (tyrkysová)
* Výrobca: CCCP
* Vhodný pre:
* opravy videozariadení
* domáce projekty (hodiny s teplomerom/dá-tumom a pod.)
An Arduino clone (a Freeduino-SB from Solarbotics) powering a dual-digit common cathode 7 segment display using two 74HC595 shift registers. I can control 16 LEDs with only three Arduino outputs.With the two additional 74HC595 ICs I can drive the next two digits, all from the same three output pins.
maplemuse.wordpress.com/2011/05/13/shifting-bits-with-ard...
Top: 2-digit Led 7-Segment from unknown maker
Bottom: HP-5082-7414 : 4-digit Led 7-Segment from HP
More detail at picnote.blogspot.com
You can see the parts of an old 7-segment display from the former GDR. Left the LEDs, pretty small on the pcb.
Above the lightduct. Under these thing is the diffusor-foil which diffuse the light. It lies on the casing.
(pdf) Free, potentially useful and at least full of nice parts if totally busted. Turns out the transformer smokes if plugged in, so the roughly irreplaceable part is gone. Four secondaries, two centre tapped. Maybe I can replace some with various sources to end up with more working bits.
edit: I've since put two transformers inside to power the dual adjustable power supplies and the function generator. Both work nicely. Feeding the +5V line from the adjustable also makes the digital features work. The DVM and -5V would need other power supplies.
Built to the schematic, every signal and point tested and confirmed. LED's work when powered. Now to get the full-sized and SMD parts, build and program this, and then build a small one and program it with this program. That's the hope :)
Cute small LED displays on sale. Added some stripboard and resistors, multiplexing. Here it's running a quick decimal counter on attiny2313.
Flash ran out of batteries before I could dial a good balance and angle.
Top: 2-digit Led 7-Segment from unknown maker
Bottom: HP-5082-7414 : 4-digit Led 7-Segment from HP
More detail at picnote.blogspot.com
SIngle-sided home-etched test board on the left, professionally made 2-sided board on the right. Left board has a through-hole SAA1064 on the back, in a socket, but the purple board has pads on the back for an SO24 package IC.
Ingredients:
4-digit 7-segment LED
12-key Keypad
8-bit Shift Register 74AC164
Some ohm
Piezo Speaker
More information is at: mulps.wordpress.com/2009/08/26/arduino-kitchen-timer/
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
Front plates in acrylic and styrene and the gears, disks and a spacer. I love the crispness of the laser cut parts!
Over the christmas break, I've been messing around with Kicad. I've been wanting to make a clock for a while now and figured it would be a good excuse to learn a new schematic and PCB design program. It's not that bad after getting used to it. The autorouter is pretty useless and I ended up routing everything by hand.
I will be sending this off for manufacture soon and ordering all the parts to populate it. This board will be about 7.5 x 2.3 inches with the digits being 1" high, and it will rest between a few sheets of lexan.
The project for March is Pr0JCL0C, a simple timer to help me keep track of time spent on a project (it's also a clock). The Green button starts timing, the Red button stops. Session times are added to a running total which is stored in the Arduino's EEPROM. I implemented simple wear levelling to preserve the EEPROM.
This is not about seeing how fast I can do something but curiosity about how long some of these projects take. Often I'll go into the den and emerge several hours later. And then do it again the next night. Occasionally I take rough notes about session times but I thought it would be fun to make it easier to do.
A close-up of the display after cleaning and repairing some of the scratches with white acrylic paint.
Yup. I've just started playing with the 4 digit 7-segment display I recieved the other day. I have concluded that without a serial interface I have limited options, beeing a 16 channel demux chip. Just think it might just not work all that well... Oh well, at least I get to play around
Initial work on the design -- it's all in the patterns of "on" and "off" sectors on the disks. As the wheels mesh together, different sectors are revealed through the 7 segment windows.
The three segment disks are at the top, using different shades for the different segments to make verification a little easier. Along the bottom I'm testing '0'... '4'.