Matrix user forums

Ahh, no probs, I have found lots of them now, going to do a wiring diagram now...

thanks
Stuart

Hi Martin, I will do a circuit diagram for you, but for now i can post the flowcode that I have altered, the backlight comes on as soon as you apply power, with no text on it. I have searched hi and lo on the internet for the PIC 18F883 that you suggested but no sign of one anywhere. I couldn't even...

I have just built the circuit on a breadboard and guess what ?, yes the LCD backlight works, unfortunately that's all. I don't know whats gone wrong but it should keep me busy, I think there is something that I am missing on all my pic circuits because none of them have worked yet... :( Lock.jpg Che...

Thanks Martin,

Yes I think I have a 4 mhz crystal here, I am going to program the chip now then with my pickit3, I want to use the keypad that I got off ebay but I need to know if Ican connect directly to the pic pins or do I have to put resisters on the leads..

Cheers
Stuart

Hi Martin,

I have a Pic16F870 that I am going to use, also I am posting a screen grab of my chip properties to see if you think they are right if you don't mind..
Thanks
Stuart

Hi Martin, I am not sure which chip to use yet, I have a few different ones here now, yes the online tutorials would be great if they were produced better, I got one of those breadboard power supplies from hong kong aswell about £4.00 with usb on it really cheap. I got a new S/H external weatherproo...

Hi Martin, I will take your word for it and try a build this weekend, I have found some interesting stuff on the forums, I found a door lock with temp gauge that shows you how to wire up your keypad with resisters, I don't like the matrix youtube videos because they are in standard definition and I ...

Thanks for your time Martin, I have tried the code that you have posted but when I run it the backlight comes on straight away and stays on, is there a way of just having the backlight on and starting the timer when any key is pressed and then going off after the timed period ? Also thanks for the i...

Hi Martin, that code is just the job, but now that I want to build it, how do I know what crystal to use with it, because it is not specified in the chip information... Also, I know that this is probably a bit ambitious, but is there an easy way to make the lcd light up as soon as any button is pres...

Thanks Martin, I don't know what we would do without you...


cheers
stuart

The problem is not the topic, it is the video quality, the tutorials on youtube are such bad quality you can not read any text, a series of HD video tutorials would be brilliant.....

thanks
Acestu

That's a bit more complicated Martin, I am hoping to get a solution to mine so that I can understand whats going on really..

Thanks
Stuart

Thanks Martin,

I will have a look now

cheers
Stuart

Hi, I have a flowcode file for a keypad combination lock, it is only 2 digit and I would like to make it 6 digit, I understand the code bad part, the code good part, and the testnumber routine, but I am struggling with the Main part of the flowcode ie the Decision "If keypadnumber = 255 which I am u...