Hello everyone, has anyone constructed a LCD display for a preamp? It should just read "input1" when that is selected, or "input2" when no. 2 is selected and so on. Pretty simple right? Not.
I looked into this, and from what I could figure out you can get a serial programmable LCD module and program it pretty easily from your computer to say something on startup with the free software.
But using it detached from your computer to display "input1" or "input2" is another matter, to do that you need a controller chip with some inputs and outputs. And to program the controller chip you need to write source code in "basicX" or something else. And to write the source code you need a development kit. This all costs over $100. So before I go out and try this, I want to know if anyone has any recommendations on how to create a LCD display for a preamp.
Here is the links I have been looking at:
http://www.basicx.com/
http://www.crystalfontz.com/products/index-ser.html
I looked into this, and from what I could figure out you can get a serial programmable LCD module and program it pretty easily from your computer to say something on startup with the free software.
But using it detached from your computer to display "input1" or "input2" is another matter, to do that you need a controller chip with some inputs and outputs. And to program the controller chip you need to write source code in "basicX" or something else. And to write the source code you need a development kit. This all costs over $100. So before I go out and try this, I want to know if anyone has any recommendations on how to create a LCD display for a preamp.
Here is the links I have been looking at:
http://www.basicx.com/
http://www.crystalfontz.com/products/index-ser.html
the MC you could order as free sample, a programmer for a PIC16Fxxx is possible to build for 5$ or so. Software you need is free. I made something like that with a Pic16F876 and a LCD with HD44100 (7€) and try now to connect a PGA2310 (.... free sample) for volume controll. In case you want to go this way mail me. For the extended high end version for those with enough money look here:
http://www.diyaudio.com/forums/showthread.php?s=&postid=175016#post175016
you want to do this with a pic processor and a parallel LCD
cuiz they are both much cheaper.
search for lcd and pic and display on the web, there will be
some projects almost exactly what you want
this is trivial for a pic programmer -harvardian?
TILL posted while I was composing -good to have a volunteer
🙂
cuiz they are both much cheaper.
search for lcd and pic and display on the web, there will be
some projects almost exactly what you want
this is trivial for a pic programmer -harvardian?
TILL posted while I was composing -good to have a volunteer
🙂
this one: http://www.sprut.de/electronic/pic/projekte/brenner5/index.htm
but there are many similar to this in the net and also plans for a clone of the in circuit programmer ICD.
but there are many similar to this in the net and also plans for a clone of the in circuit programmer ICD.
I made a pre-amp LCD display
lgreen,
Dale (harvardian) and I have recently completed a pre-amp
LCD display, along with an input select board, and volume control board.
But you could easily modify the code for your own application.
It comes with an ICD2 port and a 18F252 microcontroller.
A Blue transmissive LCD display, and two push button optical encoders.
Check out this one.
APOX
Thanks,
Craig Beiferman
lgreen,
Dale (harvardian) and I have recently completed a pre-amp
LCD display, along with an input select board, and volume control board.
But you could easily modify the code for your own application.
It comes with an ICD2 port and a 18F252 microcontroller.
A Blue transmissive LCD display, and two push button optical encoders.
Check out this one.
APOX
Thanks,
Craig Beiferman
yea, with one difference: thats not diy anymore (and the board is named diyaudio) and it is a little bit more expensive than a PIC (free) a programmer (5€) a display (7€) and few relais. So please let us poor guys go one building our own stuff.
Till,
The man asked, had anyone made a LCD display for a pre-amp.
I was just giving the guy an option. All of our schematics are posted, and are free to download. So if he is try to interface a pic to an LCD and wants to use the ICD2 port, we have a free schematic that he can reference.
If he wants to create his own PCB, thats fine with me.
We sell the unit as a kit, so it is kind of DIY isn't it?
To build the things you want, you need to use the work of others.
thousands of hours went into individual components your using
to build your DIY projects. The PCB board we already made would save him at least a week of work. And is cheaper than if he gets his own PCB board made.
-Craig
The BASICX device is the LCD+
As well as a 4X20 backlit display, It has a relay driver (ULN2803a) and keypad encoder, as well as an 8-input 10 bit ADC. With this one LCD you could also implement 256 step relay switching of an attenuator for your preamp. The 4X4 matrix keypad encoder is very useful.
you can use the LCD+ with the BX24 chip from Netmedia, but programming is a little more difficult than with the Basic Stamp -- in either case you just need a transmit and receive line to communicate, no fuss, no muss with MAX232's.
there are some tutorials on writing for LCD's all over the web, take a look at Parallax's website www.parallax.com, or Dr. Anderson's site at www.phanderson.com
Jack
As well as a 4X20 backlit display, It has a relay driver (ULN2803a) and keypad encoder, as well as an 8-input 10 bit ADC. With this one LCD you could also implement 256 step relay switching of an attenuator for your preamp. The 4X4 matrix keypad encoder is very useful.
you can use the LCD+ with the BX24 chip from Netmedia, but programming is a little more difficult than with the Basic Stamp -- in either case you just need a transmit and receive line to communicate, no fuss, no muss with MAX232's.
there are some tutorials on writing for LCD's all over the web, take a look at Parallax's website www.parallax.com, or Dr. Anderson's site at www.phanderson.com
Jack
till said:
It is still DIY. The amount of info available on the dipchip site (schematics, PCB layout) is useful to anybody interested in that sort of project. You don't have to buy anything from them, if you prefer to do it yourself. Just as an example, I ordered remote controlled volume kit, but without input selector boards. I had relay boards from my old preamp and with the info provided on their site, I can wire the control interface myself. Isn't it DIY?
I'm always surprised with the reaction of some people to anything that has even slightest commercial approach on that board. If you don't like it, why can't you ignore it (like refraining from rude remarks) and let other people enjoy benefits of that? Because anything that is posted here, can be turned into good use, if not only as a source of inspiration😉
Hey Peter, i don´t understand what you mean. Did i say something bad about that apox project? Where? From what i read until now its a great project, wonderfull parts, really nice. In case i had large amounts of money i would order those stuff too.... I have nothing against anyone does any commercial project he whants. What i dislike is to get more and more the feeling user Dipchip is a script that searches diyaudio for postings containing words like PGA2310, PIC etc. to set a off topic link to apox. His thread is well known by most off us, i´m sure everyone interested follows it (i too). What i don´t need here is any kind of spam. I don´t need to be pointed to apox a dozend times, one time is enough, ok? I´m not any kind of apox enemy, why do you try to tell me i am?? I yust think rules of well behavior are same for trolls or spammers and for people contributing with high quality projets like apox to the communtity.
sorry for the thread hijack:
the Dontronics programmer is nice,
for 2 bucks more u can get the microchip pickit1
u get cds c compiler, programmer? (but all the stuff is downloadable free anyways as far as I can see)
I think if u buy one it is the way to go usb=futureproof
**I was hoping to hear folks were using some 3 resistor "wonders " to program**
notice how many programmers and variants exist
seems like nobody could understand how the other guy
got the required voltages (or didn't) via all the caps and diodes so instead of trouble shooting just designed his own
general comments:
I like vendors who are open source, when schematics, source, parts and partial kits are available everybody wins
the vendor ( if he has any marketing skills) has to remember to respect those that want to "roll their own"
there is room for both
😉
the Dontronics programmer is nice,
for 2 bucks more u can get the microchip pickit1
u get cds c compiler, programmer? (but all the stuff is downloadable free anyways as far as I can see)
I think if u buy one it is the way to go usb=futureproof
**I was hoping to hear folks were using some 3 resistor "wonders " to program**
notice how many programmers and variants exist
seems like nobody could understand how the other guy
got the required voltages (or didn't) via all the caps and diodes so instead of trouble shooting just designed his own
general comments:
I like vendors who are open source, when schematics, source, parts and partial kits are available everybody wins
the vendor ( if he has any marketing skills) has to remember to respect those that want to "roll their own"
there is room for both
😉
That pretty much describes Craig's and Dale's site. Not to mention the fact that you would be buying something that quite a few other people had a hand in, including Petter, Anthony, Sheldon Brian and several others. Craig and Dale took many recommendations and requests and, with some discussion, incorporated some of the ideas into the design. All for the benefit of the people here in the forum, which is why were here in the first place. They have always been diplomatic and the posts of their project on other threads are only suggestive in nature, giving the readers(who don't do searches) an option. You can download anything concerning this project. They have done most of the grunt work for you like paging through catalogs (which I sometimes really hate) and researching the best parts and putting it all into a nice little kit. I think you should compare the prices they offer and you'll find they are very competitive when they buy it in bulk and you would have to buy it in ones and twos.
If you really want to be DIY then you should be laser cutting your own microcontrollers. Sometimes you have to draw a line so you can finish and move on to the next project. 😉
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