المدة الزمنية 14:46

Beginners guide to the Hitachi HD44780 LCD display

بواسطة RC Tractor Guy

62 542 مشاهدة

211

تم نشره في 2011/05/19

This is a beginners guide to interfacing with the Hitachi HD44780 LCD display which is based on a tutorial by Julyan Ilett called "How to use intelligent L.C.D.s". Visit the RC Tractor Guy website, blog, forum and store at: http://rctractorguy.com/ Become a Patron to support the RC Tractor Guy: https://www.patreon.com/RCTractorGuy Like the RC Tractors and Construction Vehicles facebook page: https://www.facebook.com/RcTractorsAndConstructionVehicles

الفئة

الكلمات

LCD

Interface

Beginner

Hitachi

Electronics

Basics

Circuit

عرض المزيد

تعليقات - 39

@

@breconmafiaمنذ 11 سنوات hey dude , thanks for getting back to me, i'll have a look tomorrow night and see what the score is on part numbers etc
@

@anjlalaمنذ 12 سنوات Awesome tutorial, thanks! Also, using eight dip switches to send test data is an excellent plan.
@

@MariaEngstromمنذ 12 سنوات This tutorial is actually awesome! Great work! :)
@

@ourayvet1منذ 7 سنوات very helpful tutorial. Thanks so much.
@

@TheAmeriswedeمنذ 12 سنوات You are the best thanks.got me going in the right direction.
@

@breconmafiaمنذ 11 سنوات the akai s950 is an old machine (1989) uses el foils in it, done a search and apparantly people have modded there machines with this particular display, id="hidden2" class="buttons"> i've ordered one of these hd44780 chips from china anyhow so when it arrives i'll have a go of putting it in and keep you updated , thanks for your reply! ....وسعت
@

@MrLRankin2منذ 11 سنوات This is a wonderful tutorial. One thing though. The double and triple characters are caused by a phenomena called "Switch Bounce" If you were id="hidden3" class="buttons"> to look at the signal with a scope you would see a very noisy signal ranging from zero volts to 5 volts many times faster than you can actually press the switch. There is a technique in programming called "Switch Debouncing" that takes care of this so that it would appear that the signal only transitioned once. ....وسعت
@

@bridor5285منذ 11 سنوات Hey, I have an led display from a DVD player that has 15pins, some run on gnd and some run on +3.3v but i cant figure out how to control the individual segments because if i have all pins powered the entire display lights up, but lets say I take out gnd pin 1, all the bottom parts of the numbers will be removed and I have 4 letter "A". How do I control each light individualy??? PM if you can help please! ....وسعت
@

@pekerinoمنذ 12 سنوات and how it work with the 4bit mode?? i need to get another table for getting the characters!?
@

@RCTractorGuyمنذ 11 سنوات Have you got a potentiometer on the LCDs pin 3 to adjust the contrast? Other than that I'm not sure although I have gotten some cheap LCDs on ebay id="hidden5" class="buttons"> which have had very poor contrast. I can't think of anything else it could be sorry ....وسعت
@

@breconmafiaمنذ 11 سنوات will this display work in an akai s950 sampler?
@

@SmeeUncleJoeمنذ 2 سنوات Can you tell me how to tell the difference between a HD44780S and Hd44780U ? I'm putting some circuits together and would prefer to have a single 3.3 id="hidden6" class="buttons"> v power supply for type U, instead of having to add in a 5V for the type S. I can't see the underlying chipset indicated on the unit. ....وسعت
@

@kousoulidesمنذ 12 سنوات Hi, I've done a couple of projects using Arduino, Now I think I want to try do something with a PIC microcontroller, I am very experienced with c++, id="hidden7" class="buttons"> but I don't know assembly, is it very difficult to program one of those? How do you upload the code to the microcontroller? do you use a usb cable like with Arduino? ....وسعت
@

@elettronicaemotoriمنذ 6 سنوات Ciao e complimenti per il tutorial.
Gentilmente, puoi dire come hai fatto inizializzazione LCD?
Io non riesco a farla ho sempre problemi.
Grazie
@

@MrLRankin2منذ 11 سنوات It can also be taken care of in hardware with a cap and a resistor set up to create a suitable time delay.
@

@RCTractorGuyمنذ 11 سنوات Do you mean the ten pin piano dip switch? It works the same way as a toggle switch except that the switches all share a common pin. Does that make sense? I can make a video on switches if you really want it I don't mind
@

@RCTractorGuyمنذ 12 سنوات Hello, no you still use the same table however you send the commands in two 4 bit segments, I think its called sending a nibble or something like that. id="hidden10" class="buttons"> You need to send a command to set the LCD into 4 bit mode first though!! ....وسعت
@

@RCTractorGuyمنذ 11 سنوات Ah right that's very cool, well I think el foils are used to create the back light for character LCDs so there's a good chance it will be something similar. Hopefully it works out for you, good luck with it
@

@RCTractorGuyمنذ 11 سنوات I think it is, I've never used a sc204a but I think the pinout looks right.
@

@williama-d6منذ 11 سنوات are you sure i have a toggle switch i haven't used on the board but it works differently i think i think you should make a video couse it really pissing me off
@

@breconmafiaمنذ 11 سنوات the display came for the akai s950! exactly the same size as the old lcd, it has 2 bits where i can solder on to the right, and two on the left , the old id="hidden13" class="buttons"> lcd has a 7 pin socket connection on the right though so i'm scratching my head ....وسعت
@

@SmeeUncleJoeمنذ 2 سنوات Almost need a Newfie (from Newfoundland, Canada) to translate and i with my ancestors from County Claire. Thanks for this though.
@

@RCTractorGuyمنذ 11 سنوات Hi sorry for some reason your message got flagged as spam and I only just seen it now. I'm not sure you do have an LCD like the one in the video, can id="hidden14" class="buttons"> you check that it isn't a VFD or a numeric LCD? That might help you figure out how to control it. ....وسعت
@

@RCTractorGuyمنذ 11 سنوات This is the first time I've ever heard of an akai s950, from a quick google search it appears to be some sort of synthesiser so I can only assume you id="hidden15" class="buttons"> intend to replace the existing display? The display appears to be a 40x2 character LCD so I would guess it is a standard character LCD controller by a HD44780 chip but I couldn't say for sure, it could be a custom display designed for that device. If you look at the old display you might find a part number to find a spec sheet or pins labelled? ....وسعت
@

@paulsharpe7740منذ 8 سنوات hi a 4 X 20 the cursor starts at 0 for line 1 ,,64 for line 2 ,,20 for line 3 and 84 for line 4 . The line's are much longer than the screen on a 2 id="hidden16" class="buttons"> X 16 and thay have gust folded the ends to appear to be a 4 line which is why the addresse look funny but try it . ....وسعت 1
@

@someoneyoudontknow106منذ 8 سنوات i have a 4x20 display but i can only write to the first and third line . how do i initialize the display for 4x20 so i can use all of the four lines??? id="hidden17" class="buttons">
btw i can set my arduino to work with my 4x20 display and it works so my display is ok! ....وسعت
@

@RCTractorGuyمنذ 11 سنوات To be honest I'm not sure, can you see a part number on either display. Maybe we could check the spec sheets for each (if we can find them) and figure it out from there
@

@dylanmcjarrow7934منذ 6 سنوات place a low pass passive filter on that button
@

@RCTractorGuyمنذ 12 سنوات Hi, well first I guess I should explain that you aren't really programming the Atmel chip on the arduino, you are only telling the bootloader (which id="hidden19" class="buttons"> came preprogrammed) what to do, thats why you don't need a programmer for an arduino. If you want to stick with that theme you might think about using a PICAXE, I've never used one but I think it comes with a bootloader installed. If you decide to go for a normal PIC you will need a programmer but you should be able to use you knowledge of C! ....وسعت
@

@RokcetScientist1منذ 13 سنوات Stop mumbling and speak up, mate! Next time better.
@

@breconmafiaمنذ 11 سنوات the akai s950 is an old machine (1989) uses el foils in it, done a search and apparantly people have modded there machines with this particular display, id="hidden20" class="buttons"> i've ordered one of these hd44780 chips from china anyhow so when it arrives i'll have a go of putting it in and keep you updated , thanks for your reply! ....وسعت
@

@MrLRankin2منذ 11 سنوات This is a wonderful tutorial. One thing though. The double and triple characters are caused by a phenomena called "Switch Bounce" If you were id="hidden21" class="buttons"> to look at the signal with a scope you would see a very noisy signal ranging from zero volts to 5 volts many times faster than you can actually press the switch. There is a technique in programming called "Switch Debouncing" that takes care of this so that it would appear that the signal only transitioned once. ....وسعت
@

@bridor5285منذ 11 سنوات Hey, I have an led display from a DVD player that has 15pins, some run on gnd and some run on +3.3v but i cant figure out how to control the individual segments because if i have all pins powered the entire display lights up, but lets say I take out gnd pin 1, all the bottom parts of the numbers will be removed and I have 4 letter "A". How do I control each light individualy??? PM if you can help please! ....وسعت
@

@RCTractorGuyمنذ 11 سنوات Have you got a potentiometer on the LCDs pin 3 to adjust the contrast? Other than that I'm not sure although I have gotten some cheap LCDs on ebay id="hidden23" class="buttons"> which have had very poor contrast. I can't think of anything else it could be sorry ....وسعت
@

@SmeeUncleJoeمنذ 2 سنوات Can you tell me how to tell the difference between a HD44780S and Hd44780U ? I'm putting some circuits together and would prefer to have a single 3.3 id="hidden24" class="buttons"> v power supply for type U, instead of having to add in a 5V for the type S. I can't see the underlying chipset indicated on the unit. ....وسعت
@

@kousoulidesمنذ 12 سنوات Hi, I've done a couple of projects using Arduino, Now I think I want to try do something with a PIC microcontroller, I am very experienced with c++, id="hidden25" class="buttons"> but I don't know assembly, is it very difficult to program one of those? How do you upload the code to the microcontroller? do you use a usb cable like with Arduino? ....وسعت
@

@RCTractorGuyمنذ 12 سنوات Hello, no you still use the same table however you send the commands in two 4 bit segments, I think its called sending a nibble or something like that. id="hidden28" class="buttons"> You need to send a command to set the LCD into 4 bit mode first though!! ....وسعت
@

@breconmafiaمنذ 11 سنوات the display came for the akai s950! exactly the same size as the old lcd, it has 2 bits where i can solder on to the right, and two on the left , the old id="hidden31" class="buttons"> lcd has a 7 pin socket connection on the right though so i'm scratching my head ....وسعت
@

@RCTractorGuyمنذ 11 سنوات Hi sorry for some reason your message got flagged as spam and I only just seen it now. I'm not sure you do have an LCD like the one in the video, can id="hidden32" class="buttons"> you check that it isn't a VFD or a numeric LCD? That might help you figure out how to control it. ....وسعت
@

@RCTractorGuyمنذ 11 سنوات This is the first time I've ever heard of an akai s950, from a quick google search it appears to be some sort of synthesiser so I can only assume you id="hidden33" class="buttons"> intend to replace the existing display? The display appears to be a 40x2 character LCD so I would guess it is a standard character LCD controller by a HD44780 chip but I couldn't say for sure, it could be a custom display designed for that device. If you look at the old display you might find a part number to find a spec sheet or pins labelled? ....وسعت
@

@paulsharpe7740منذ 8 سنوات hi a 4 X 20 the cursor starts at 0 for line 1 ,,64 for line 2 ,,20 for line 3 and 84 for line 4 . The line's are much longer than the screen on a 2 id="hidden34" class="buttons"> X 16 and thay have gust folded the ends to appear to be a 4 line which is why the addresse look funny but try it . ....وسعت 1
@

@someoneyoudontknow106منذ 8 سنوات i have a 4x20 display but i can only write to the first and third line . how do i initialize the display for 4x20 so i can use all of the four lines??? id="hidden35" class="buttons">
btw i can set my arduino to work with my 4x20 display and it works so my display is ok! ....وسعت
@

@RCTractorGuyمنذ 12 سنوات Hi, well first I guess I should explain that you aren't really programming the Atmel chip on the arduino, you are only telling the bootloader (which id="hidden37" class="buttons"> came preprogrammed) what to do, thats why you don't need a programmer for an arduino. If you want to stick with that theme you might think about using a PICAXE, I've never used one but I think it comes with a bootloader installed. If you decide to go for a normal PIC you will need a programmer but you should be able to use you knowledge of C! ....وسعت

DMCA

MENU

جني المال

مواقع أخرى الإقليمية

Beginners guide to the Hitachi HD44780 LCD display

الفئة

الكلمات

LCD

Interface

Beginner

Hitachi

Electronics

Basics

Circuit