Ez Controller Circuit

Question

Hi @DJ, I'm having fun making EZ-Robots... But I was wondering if we can get a circuit diagram of EZ-Board?

MovieMaker · Answer

No, it is proprietary. sorry.

robotmaker · Answer

CAN GET THE spec sheet on the processor and using reverse engineering and trace the wire and connection very easy to do,mostly its simple 3.3 volt regulator circuit and 5 volt regulator circuit,simple clock circuit ,reset circuit uses 2 resistor and the pins from the cpu to each of the output pins on the board

Rich · Answer

@Pravnav What do you want the circuit diagram for?

robotmaker · Answer

DONT really have to reverse engineer it ,can easy look at arduino circuit it almost the same But whats good about this if you have a bad board its very easy to troubleshoot it. THATS only reason someone wants a schematic ,no other I think DJ doesnt have the time to put up the circuit,circuit is a very common used circuit for microprocessor,no special about about

pranav · Answer

Hi @Rich, I was jus wondering that such small controller is very versatile... I was jus eager to know about it... Noting specific or serious...

robotmaker · Answer

I have the pdf file on microcontroller but its very easy to find look under the bluetooth module for the part # and do a search for it.

pranav · Answer

Yeah, it's a PIC 18LF4685 microcontroller... I found the datasheet for it... Thank you...

robotmaker · Answer

@Herr ball there is a fuse inside the chip that protects the chip first from getting info on the chip using a programmer and second protects the chip so you cant write to it. Does that explain it better

irobot58 · Answer

@robotmaker....yes that does explain it better! You should have said that to begin with! Anyways thanks for the reply......and ....I reasearched a bit more and answered my own question ......"In addition to their Power-up and Oscillator Start-up Timers provided for Resets, PIC18F2682/2685/4682/ 4685 devices have a Watchdog Timer, which is either permanently enabled via the Configuration bits or software controlled (if configured as disabled). " WARNING: accessing the circuitry is NOT advised for the feint of heart nor ment for this Forum IMO

pranav · Answer

What are the functions of pin 6, 13 and 14 in the PIC18LF4685 used in the EZ-Controller?

Niek · Answer

Are you trying to replicate the EZ-B?

pranav · Answer

Oh no! eek I am not that talented to replicate... I don't even understand half of the technical terms used in these forums... I am just trying to understand things better and improve my technical skills... I am from a typical Indian middle class family... So I don't get an opportunity to learn things... I am not even good at communicating with others... So,If I am wrong in asking that question, I am sorry... Please forgive me guys... tired

Rural Geek · Answer

@pranav as for the pins and what they do I don't know myself. But if there is something you read and don't really understand just ask. Everyone is here to learn share and help each other. with the internet at your finger tips you can lean about anything in the world, thats whats so cool about it..

pranav · Answer

Thanks for your support... I will really improve upon myself with help from you all...

Robot Doc · Answer

Here is a snapshot of the PIC taken from a datasheet available on the internet.

pranav · Answer

Yeah.. I have got this pic...I just wanted to know in what modes are the pins 6, 13 and 14 are used in EZ-B... I was thinking about it because we have 8 analog pins, 20 digital pins, 2 VDD pins, 2 VSS pins, one MCLR, SCL, SDA, TX, RX, PGD, PGC... So 39 pins in total, I was wondering about the remaining one pin.. Moreover I was confused with the pins 6, 13 and 14 in which mode they were used...

DJ Sures · Answer

You figured out that much, the last one pin is easy you'll get it! Keep trying

pranav · Answer

Yeah... Thanks for your encouragement @DJ... I'll try to figure it out...

Niek · Answer

Pin 13 and 14 are both for the crystal oscillator. This makes sure the EZ-B works at the correct operating frequency. I'm leaving pin 6 to you

Wolfie · Answer

The only pin i cant see listed on that photo is a ground :S but it has been many many years sints ive looked at any chips at all lol

Robot Doc · Answer

You have to look close:

pranav · Answer

Pin 6 ain't Ground... I still couldn't figure it out... @DJ help please...

Robot Doc · Answer

No one actually said that pin 6 was ground. The discussion was where was the gnd pin identified.

Niek · Answer

@pranav Pin 6 is probably used as T0ckl, now you find out what that is.

pranav · Answer

I still couldn't figure it out guys... Please help me...

pranav

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