Grayhill - 96AB2-102-R - Allied Electronics keypad, non backlight
Jameco Electronics Opto & Illumination: JAMECO VALUEPRO: UN4043-13 EWRS-R 3 digit last score entered
LED's/LCD's - LED Display - 7FR5641BS 4 Digit Current score large display
That's what I've got so far that looks good, not exactly what I wanted but I think they would work.
I've been trying to find a good led for the cricket scoring. I think 5mm leds are too small. I'm trying to find some that houses the led and provides a clear cover lense so as to make it bigger. I'm thinking something like 8-10mm is big enough.
On the Leds, I think that just a 10mm led is kind of blah looking. But maybe a 10mm led with a flat top would look alright.
Hey Guys. I'm looking to make a similar clone of the Dart Master 3 and this forum turned up during my search... I was also happy to see it's actually a current thread too!
So I have an EE degree but haven't done any HW/SW design in years. I thought this would be a nice project to re-learn some things while saving a bunch of money on an overpriced dart scoring system. I have an Arduino Mega (Arduino - ArduinoBoardMega) and plan to use that instead of a PIC for my micro controller. I took a look at your preliminary schematic and it looks very good. definitely helped me remember a few things, much more still to remember though. anyways. thanks for the work so far. I wonder if you have any experience with Arduino (It's actually my 1st project with the micro). I have a few questions if so, mainly SW related since im not too strong in that realm.
Also I'd love some help on the manufacturing side for a case, etc. I hope you guys are still into this project. Thanks.
one main question I had was whether i would need the 7-seg driver IC's or if i could simply use Arduino digital I/O instead.
Also i plan to have one more 7-seg (x3) display than the OP (6pcs 3x7 seg total). i think i can run this from the extra outputs available from the three IC's, right? for each IC i see that it can control one more 7-seg. this leaves 4 more and I only need another three.
Like you mentioned, the transistors, diodes, and resistors are not there. Neither are the caps or the cricket pushbuttons. Also, it looks like you only have 3 SAA1064s but 4 are needed for the design.
I didn't take the time to go through the data sheets for all your LED displays but just make sure that the 3 digit displays have one common anode per digit. If there is only one common anode per 3 digit display, it won't work with the SAA1064.
Edit: Also, something for you to consider is that it looks like you are only ordering the exact number of components you'll need. I usually order extras. If you fry anything, you'll have extra on hand, if not you'll have spare for future projects. Just a thought.
hmm. here is the datasheet: 7 Segment Three Digit Red 0.56 Inch (14.2mm) LED Display Specs, Data Sheet LCT-5632TUR11 from lc-led.com
i think it has an anode per 7seg (as required) but all three have common pins for the segments.. is this ok? or maybe ill have to use a 2x 7seg due to the multiplexed driver IC? what do you think?
That display won't work with the driver IC. Each pair needs to have it's own cathodes because of the way the driver IC multiplexes the digits. You should try to find a 2 digit display with shared cathodes and one anode per digit or just go with single digit common anode displays. That's probably what I'd go for. Most are end stackable and will look almost the same in the finished product.
Here is a prelimenary schematic. It probably needs some tweaking and there might be a few errors but it's good enough for you to start looking over and learning how the circuit will work. Ask questions if you don't understand something.
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