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ladder for 4 digit 7 segment LED display (multiplexed) (by jayakumar)
Thank you very much
any one can help me howto creat ladder for 4 digit 7 segment
LED display connected at pin no 21 to 27 of pic16f876A.
no subject (by simon)
Hi jayakumar. I use this program with mega32 . U need to extract only wath is important to you .
I hope is wath you need .
(no subject) (by Joao Pereira)
Hi, One off the examples in the donwload sector is exactly what you need.
(no subject) (by S A Khan)
Thank you Simon
7segment display 4 digit multiplex in ldmicro (by khalid)
Send me please ldmicro projects examples
(no subject) (by Tom J.)
I modified one of Jonathan's ladders to test a common anode 4 digit display and automated it to count up. This version also removes the 0 place holder on digits that aren't being used.
(no subject) (by Tom J.)
Here's a tricky one:
I'm using multiplexed common anode displays. The PIC has all the anodes with 1k resistors to limit the current, no transistors.
Does anyone have a ladder to use adc input to do dimming by varying the timing on the anodes or a simple hardware solution?
My project has many s and displays so simple or software would be great.
Thanks in advance, Tom
(no subject) (by MGP)
Use the PWM (0..1000) output with the ADC value and switch the common anode or common cathode.
(no subject) (by Tom J.)
I'm not certain that would work with the arrangement of the anodes.
The PIC16F886 I'm working with does have multiple PWM outputs but I don't think I can use them as general IO at the same time.
https://i.ytimg.com/vi/UFWjkoE33Xo/maxresdefault.jpg
(no subject) (by MGP)
Then use a software pwm.
The program attached is not mine, I found it on this forum.
Use a fast cycletime and it is not necessary to count to 100, counting to 10 also works.
Play with it..
(no subject) (by Tom J.)
I tried implementing the software PWM several ways and between the cycling of the commons and the PWM all it does is blink at different rates.
I think I'm just going to use a PWM and some transistors to divide some power away from the common anodes.
It was an elegant solution, at least I tried.
(no subject) (by Tom J.)
I'm having a lot of fun with LDMicro and decided to write a set of digital gauges for the next car I'm gearing up to build. I need to dim the displays so it's not overpowering at night and since I'm having fun I figured PWM would be interesting to learn and then the scale can be set in the ladder rather than changing electronics later if I decide to revise it.
The Odometer was first, now I'm almost done with the clock and I only have two more to write since the speedo and tach are similar in function and temp, oil press, fuel level and misc others are essentially the same with a little different scale for each.
Starting with the clock gives me a project where I can learn how to use the 7 segment driver and figure out things like dimming.
I've got the cycle time at 2.0 with Johnathan's 7 Segment driver and it looks pretty goodas far as shadow characters. That 7 segment driver you wrote is a little less complex, I'll have to play with it a bit.
I'm running PIC16F886 and so far I'm only hitting about 23% of it's capacity but I'm always up for more simplicity.
Thank you for your help again MGP.
readin an seria input (by Rogério Francisco)
Help, i need to read a serial input
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