Hy all
I made a schematic but I don't know if it right!
I want to conect a PIC16F628A to an LCD 20*4 , i need 2 buttons for set some stuff and an on/off button ; it is working on battery
to explain it: I wanth to have a text on the lcd than if I push one of the 2 buttons another text will apaire. EX: Time 8h (for example this text is on the lcd ) and if i push the other button to be able to set the 8 into 5 for example
All I need from you guys is to know if the schematic is right if you can help me
OMG , is that a schematic?
No offense but that is completelly wrong, I can't see anything correct in it (icluding 7805, switches on Datalink to LCD, diodes and cappacitors that prevent current from powering it).
Is this your first attempt to draw your own schematic?
First the diode that was supoded to protect the circuit is the wrong way around (It wont let any curent to the circuit).Then the on indicator LED is in series whith the surce and it dosent have an curent limiting resistor.Then the filter capacitators are also i series and are suposed to be in parallel whith the suply.
Then the switches are not wired properly.
The PIC and the LCD are not geting power becose the capacitator is in series agen.
This design wont work since its full of errors.
Im sory but this needs to be complety re designed.
You can't pass DC with a series capacitor, so your power circuit (7805) won't work. You need to bypass any AC to ground. Capacitors pass AC, so they need to be connected from the rail to ground.
The switches need to have a pullup resistor to a power rail, so there are no floating inputs.
The diodes are all in the wrong spots. They need to have a 100 ohm or so resistor to ground from the rail
You have a bad attitude, you should want to know how things work first (eg reading datasheets and books) and then try to build it yourself. Don't rely on anybody (eg somebody will make SW for you) but try to do it yourself. Only then you can learn something.
I have a friend that is gonna help me with the soft he is gonna learn me to right it
I read the datasheets for the components that I used but they are in english an I am romanian I mean I don'y understand all the stuff
Please can you help me in redrwawing the schematic