A short story

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A quick introduction, I'm retired Master Auto Tech 65 yr.'s old and just stumbled intro Arduino. Always been interested in electrical & mechanical things. any way I saw this guy Dave at ( EEVBlog ) explaining OP-Amps and I was blown away I bought an analog and digital scope an assortment of electrical parts and an Arduino UNO, bread boards, and an assortment of sensors and things to play with. Enough, The reason I asked you here is. I bought 2 Transistor checkers ( http://www.instructables.com/id/... )

I did nothing but light up the display the 2nd worked I swapped out the atmel chip and it worked so I thought I would re program it I bought a ARV programmer ( http://www.jyetech.com/Products/... )  It says to  Change the board into USB-UART converter
The board can be easily changed into an USB-UART converter by following steps below.
1. Add the resistor R8 (simply short it if you don’t have a 0 ohm resistor handy)
2. Flash the MCU with AVR-CDC firmware (available at http://www.recursion.jp/avrcdc/ or
www.jyetech.com ). when I plug it programmer into my PC Windows 10 it does not see it, it sees the Arduino I tried a couple of avrcdc files but nothing I'm wondering if I need to remove the resistor first  at this point I'm lost! 

I almost didn't post this, I read the tutorial about posting on this site and it sounds like I was being made to feel inferior to the GODS. 

Look I'm old and tired, all of this has happened inn the last 2 months and I have been doing nothing but reading for days at a time. if someone could help my or point me in the right direction I would be grateful.

understanding op-amps, Mosfet, diodes, voltage dividers, and trying not to be confused over weather at the moment it's flowing from + to -  or need to relies it's - to +   I'm looking at.

I'M TIRED  thanks for the time. Mick

 

 

     

 

Mick

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Look I'm old and tired,

Join the club junior..... laugh many of us here are older than you, but is 65 OLD? Nah.

 

Unfortunately I'm not an Arduino fluent person but welcome to AVRFreaks, someone will pop up with some answer.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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Mick B wrote:
I did nothing but light up the display the 2nd worked I swapped out the atmel chip and it worked so I thought I would re program it I bought a ARV programmer ( http://www.jyetech.com/Products/... )  It says to  Change the board into USB-UART converter The board can be easily changed into an USB-UART converter by following steps below.

 

Why do you want to change the board into a usb->serial converter? 

 

From what I can figure, you need R7 and R8 fitted for the recursion.jp code

 

Personally, I'd just buy a real usb->serial board and avoid the hassle of this crappy work-around. It's a bit like fixing a leaky exhaust with coke cans and fencing wire - sure it works, but it's not what you'd call a clean solution.

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What is the price aof the board?

What is the price of a USB<->UART converter?

 

Well, OP is annoyed because he has lots to read. AVR datasheet are 300-400 pages (with diagrams); ARMs datasheets are 700-1000 pages (I am afraid there are no limits; perhaps they will become written in Cantonese).

But datasheets are structured enough that one only reads chapters one is interested in, Avrs last long enough -it is unpleasant to find a nice circuit, and know MCU is no longer manufactured/distributed).

Arduino has very nice help, with examples.

 

Avrfreaks -forgot the adress- has very nice tutorials, for many topics.

 

Gammon http://www.gammon.com.au/forum/b... was very useful for me

 

4 years ago, a man buying an Arduino in Paris complained Arduino doc was mainly English; I bet this trouble does not occur in Florida.

This was before Hackable Magazine, a French journal, existed : main topics are Arduino and RPi (but this month, had a Z80 working: RAM was emulated by an Arduino, and it has a huge heap of Dupond wires). Author/Editor described, in the 10 first issues, each and every programming & data structure (variables, loops, arrays, functions, (arrays of) function pointers ....  except circular buffers) one found/should find in Arduino programs.

 

Maybe there is a review like this in the States.

 

Economical advantages of reading documentation: the time spent is not spent in buying... one can get some ideas of how to buy, what one needs (Arduini and avr component toaesters are gems, and OP choices seem often very wise)

Technical advantages :one codes less, making less bugs.

 

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I don't think one of these will break the bank:  https://www.ebay.com/p/Cp2102-US...

 

 

Mission: Improving the readiness of hams world wide : flinthillsradioinc.com

Interests: Ham Radio, Solar power, futures & currency trading - whats yours?

 

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Mick B wrote:
I almost didn't post this, I read the tutorial about posting on this site and it sounds like I was being made to feel inferior to the GODS.
Sorry but what tutorial are you referring to? We most definitely don't want to give that impression - in fact the opposite so I will change anything that appears to be condescending. Folks here are just present to try and help out other AVR users with their own shared experience.

 

Moderator

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Mick B wrote:
I almost didn't post this, I read the tutorial about posting on this site and it sounds like I was being made to feel inferior to the GODS. 

Which would have been unfortunate if you had not as your first thread is better than many we get around here.

 

clawson wrote:
but what tutorial are you referring to?

+1

 

 

As John has already mentioned, the Arduino is a great place to start.  You can get knock off Unos and Megas from ebay for next to nothing and they have a HUGE variety of add-on shields with example code for you you experiment with.

 

Post your questions without pause, or hesitation, and welcome to the Freak Show! laughcheeky

 

 

 

Jim

 

Edit:  I should have read the OP a little better.

 

That Programmer you are using is an ISP programmer...albeit an odd duck, but they do provide a user manual for it at least.  All you would need to do to program your device in circuit(provided it has the pins on the target) is to connect one of the headers from the programmer to the target,   You do not need to change the board to a USB/Uart converter for programming. 

 

If you want a career with a known path - become an undertaker. Dead people don't sue! - Kartman

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB user

Last Edited: Wed. Jun 13, 2018 - 02:07 PM
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 It says to  Change the board into USB-UART converter

I'm afraid I don't understand the current goal.

 

Did only one of the little Transistor Checker boards work, and you are trying to debug the other one, or are you just tinkering with the board, and attempting to make it do something different?

 

One can program the micro with ISP, (In System Programming), which requires specific connections from the AVR programmer to certain pins on the micro.

If the micro has a "Bootloader" program already loaded in the micro, using a programmer, then one can load a program using a USB to Serial bridge, (if the Bootloader is set up that way).

 

It doesn't appear from the schematic that the board has an ISP programming header, which is unfortunate, as that would make programming the micro/board easy.

 

If the board has a Serial Bootloader, then as mentioned above it is certainly easier to just purchase a small USB-to-Serial breakout board, (eBay, Ada Fruit, Spark Fun Electronics, BangGood Electronics, etc.)

 

Hand Hang in there and you will soon be converted from a Master Mechanic to a Micro Guro Guru.

 

JC

 

 

Last Edited: Wed. Jun 13, 2018 - 10:15 PM