Matrix user forums

Many thanks Martin for your help and suggestions. That's quite an interesting volume control that you have put together there.

I will also look at the learning centre of this website and see what I can find

Phil

Hi Nico, Many thanks for your reply. That's an interesting looking digital potentiometer. The original circuit uses a 4-gang motorised pot. Two of the four gangs were used for carrying the L and R audio channels and the third used for adc input and the fourth is just a spare. I would like to keep to...

Hi,

Is there somewhere on this forum that I can read/learn on how to use the ADC input using flowcode?

Its for an old amplifier that I am restoring. I would like to be able to use the volume control pot to display its set position on the display in dB.

Many thanks in advance

Phil

Hi, Problem solved :D It turned out that I had a faulty ribbon connector on my ribbon cable that carries +5vdc and the serial data to the analog board. The plug had a short which sent 5vdc to the clock input of the pga2310. Removing the old plug and fitting a new one solved the problem. Many thanks ...

Hi Fotios,

I am currently using the PIC16F1939 for the project.

Many thanks

Phil

Hi, I have run into a problem with the analog section of my preamp. There is no sound coming from the PGA2310. There is a signal present from the first buffer stage that connects between the input sockets and the audio input pins of the PGA2310 device but I cannot get any signal from its output pins...

Hi Benj, Well I need to say a big thank you for finding the solution to my problem :D After a bit of trial and error with finding the correct place to add the comand in the flowchart the flashing cursor has gone. First attempt resulted in the display either not working or showing randome symbols or ...

Hi Benj,

Do I add the command in c-code of my flowchart at the begining or somewhere else?

Thanks again for your help.

Phil

Hi Martin, Thank you for doing that for me :D The web browser that i'm using would not give me an option to save the link so I tried opening the link in a new tab and clicking file and then save as but when looking for the attachment in the saved location it wasn't there. It also wouldn't open with ...

Hi Benj, Thanks for your reply. I have just downloaded the data sheet for the vfd display I have. I have had a read through the data sheet and there is a section on page 12 regarding "Power On Reset" but I am not quite sure how to implement it in FlowCode. would you be able to take a look ...

Hi, I have a strange problem with a vfd display that I'm using for a project. When power is applied to the mcu a cursor flashes on the top left hand corner of the display. The cursor then moves to a different position when text or numbers are printed on the display. If I remove power from the mcu fo...

Hi, I have noticed a small glitch with the display. When power is switched on a curssor flashes on the top left corner. When the message "WELCOME!" Is shown on the display the flashing curssor is positioned after the exclamation mark. If I remove power from the mcu and display for a few se...

Hi Fotios, Couldn't agree more about the P16F887. It has proven very reliable for this application. As far as the P16F1939 goes it seem to work fine in my test board but I have not installed the mcu in my preamp yet. Whilst modifying the code and trying to solve the RC5 ptoblems I decided to take ap...

Hi Fotios,

I've tried the P16F1939 and it works

The remote function works with no errors and everything runs at the correct speed. Many thanks for your time and patience, it is so very much appreciated.

Phil

Hi, My display also does not work properly with the P18F4520 but the display works fine with p18F4525. So far I have only tried the P18F4520 on a test board that I built last year for this project. I will also double check the configuration settings to make sure all is correct and then I will try th...

Hi Fotios That's good news that there is another mcu that I can use in place of the PIC16F887 that has more memory and is compatible with the RC5. I was going to ask if you had tried it with the code I sent you but after re-reading your post I noticed it was the pic16f1937 you have. I will have to o...

Thank you

I have just sent you an e-mail containing the fc file.

Phil

I have just tried to upload the fcf file but the file is to big to upload. Can I e-mail it to you?

Many thanks

Phil

Ok I've just changed the target IC for a PIC18F4520 in the project options to match what I currently have. I have tried the C-code that you quoted but when compiling it flags up an error in C-code. I also changed the Port A/D Enable to PORTB <4:0> configured as digital inputs on RESET . I would like...

I received some new mcu's but unfortunately the PIC18F4525's have not arrived as my local retailer has none in stock until next week. is it possible for me to try PIC18F4520 mcu's instead? Also I have used RB.2 for an output. the output is used to trigger a power amp to switch it on and off with the...

I will give that a try this evening after work. I am hopping some new PIC18F4525 and PIC18F4520 today. My current PIC18F4525 sometimes won't ID when compiling using FlowCode or PPPv3. I will try what you have suggested and I will let you know if it works :D Many thanks again for your kind help Phil

I completely forgot to mention that after changing the mcu in FlowCode to the 18F4525 that when trying to compile the code to hex an error is flagged up in the Icon List. It points out that there is an error in C - Code. this is the error that is flagged up :- wpub = 0xFE; In order for FlowCode to c...

The exact voltage is 4.9v at pin RB.0. When a button is pressed on the remote handset the voltage at pin RB.0 fluctuates betwean 4.3v to 4.45v.

I was hoping to try another PIC18F4525 but I am still waiting on some new ones to arrive.

Many thanks for your help.

Phil

Hi, I've checked the IR receiver on my hardware. I removed the microchip from its socket and there is 5v pressent on the RB.0 pin on the IC socket. When pressing any of the buttons on the handset the voltage drops but is unstable for my DMM to meassure the voltage correctly. But the voltage does dro...

Hi, I did manage to re-program the mcu (18F4525) this evening after sorting out a small glitch I had with FlowCode not being abled to ID the target device. I still can't get the IR receiver to work even after tying MCLR pin to VDD via using microchip's circuit. All other functions work with no probl...