I was looking at this project online which seemed pretty simple only thing is it has no hex code but uses the PIC chip. I just really need to monitor one area and that's the outside air temp.
If you want to build it exactly as shown you don't need to modify the .hex file. BUT if you want to do something different or make changes you need the source file.
If you want to build it exactly as shown you don't need to modify the .hex file. BUT if you want to do something different or make changes you need the source file.
I can't just buy a PIC16F628 from mouser and expect it to display like that right? That's why I was asking about the hex file. but if that's not needed then that's better
Ah I see.. so really costs me $65 I don't like the LCD that comes in the kid they have I wanted a Yellow/Green display. oh well... I emailed them anyways to make sure since they talked about upgradable firmware and all.
I have a question does a HEX file allow custom boot screens? I was looking at this LCD again and I noticed the last picture they have a text on the screen. Without the LCD in my hands yet I can't test it but can it be custom every time the LCD turns on it will show the message then the temperature?
I have a question does a HEX file allow custom boot screens? I was looking at this LCD again and I noticed the last picture they have a text on the screen. Without the LCD in my hands yet I can't test it but can it be custom every time the LCD turns on it will show the message then the temperature?
ok a little update I started building this kit yesterday and I'm done however when i turn the power on the LCD only shows black boxes from what I hear that means the LCD is not initialized yet.
two things I have a question about in the circuit.. it uses a tact switch to change modes only two leads need to be solder to make a connection?
Also it uses a Dallas DS1820 digital temperature sensor it says it's one wire so for testing only I just hooked up only one wire maybe that's why it's not working right?
ok a little update I started building this kit yesterday and I'm done however when i turn the power on the LCD only shows black boxes from what I hear that means the LCD is not initialized yet.
two things I have a question about in the circuit.. it uses a tact switch to change modes only two leads need to be solder to make a connection? YES
Also it uses a Dallas DS1820 digital temperature sensor it says it's one wire so for testing only I just hooked up only one wire maybe that's why it's not working right? Two wires [not the +V]
sorry been having a hard time getting to this site not sure why... but the PIC comes pre-programmed.
And Houseofwax not sure why that is as well.. once I know I got it working I will add a pot to adjust it since it will be going in a car.
the sheet you see in the picture lists all the spots where the resistors go like the 10 Ohm between the output of the voltage regulator and the backlight (+) and the two 1K resistors for the temp sensors and a 10k for V+ and the tact switch and the 5.1k for the contrast on the LCD to ground.
Also hooking up the other lead to the temp sensor did no good as well.
Add the pot to set the contrast. Without it you will only see black boxes the same as if the LCD was unitialized.
Keep both sides of the temperature sensor hooked up. It is called a 1 wire sensor but that means 1 wire + gnd. So it take two. But the sensor is not your problem yet. It is the pot.
hi,
Your image shows the LCD has not been initialised correctly.
Top line is blocks, bottom line is blank.
Check the wiring from PIC to LCD.
I dont see any decoupling, I know its not on the circuit diagram, but I would have added at least a 100nF either side of the 7805 to prevent any instability.
the sheet you see in the picture lists all the spots where the resistors go like the 10 Ohm between the output of the voltage regulator and the backlight (+) and the two 1K resistors for the temp sensors and a 10k for V+ and the tact switch and the 5.1k for the contrast on the LCD to ground.
I went ahead and put in two 0.1uf caps for decoupling one for Vin and one for Vout both go to ground. the voltage to the PIC is 5.2v and for the temp sensor I get around 4.2V
here is a picture of the PCB without the LCD connected, the trim pot has not been solder down yet because I don't know should I take out the 5.1K resistor and use the pot or leave that resistor in and put in the pot as well?
Also the tact switch when pressed it's in a on state it's a SPST type but should I be getting some kind of voltage reading on it when I press it? Because I don't