Hi Harry, Problem fixed. The usb to serial device I received had a switch which wasn't on the device shown in the project. Also had a dtr pin not on the project. This meant data received. I connected it the same as the rts pin in the project with the capacitor connected to reset pin on MCU. No...
Hi Harry, I have already looked into all those references. I think I must have the wrong port. I have seen one reference where burning the bootloader you use a com 18 port. I don't have to burn a bootloader as the atmega 328p already has a uno bootloader preinstalled.When you pick the programmer...
Hi, Can't get this project to work. Not uploading. I am using atmega328p mcu ic with arduino uno bootloader from jaycar. cat zz8727. Using uno com3. What is the programmer? Tried
avr isp, avrisp mkll, arduino isp, arduino as isp. None of these work to upload my program. Can anyone help?
Hi Harry, none of those circuits are the one I posted with the pnp transistor connected to the gate. I was hoping somebody could explain how that circuit works? It doesn't look possible. It is the circuit you also posted asking for 1 amp or 100 amps. I suggested 1 amp. Do you or anybody else on...
Hi Harry, I would never use this circuit myself. A triac optocoupler is much better. Either phase control(random) or zero crossing. The thing is the circuit is from a book called Power Electronics by a professor of Electrical Engineering at Edinburgh university in Scotland. So the circuit must...
Anybody got any idea how the attached electronic circuit works. It appears you would need a reverse current through the pnp transsistor. If somebody knows and would kindly add resistor values I can test it in a spice simulation. The circuit is from a textbook on power electronics.
power...
Hi Harry, Did I mention that I am using a 'usb to serial/ttl adapter' connected to a duinotech atmega 328p mcu with an already installed uno bootloader. Both items purchased from Jaycar. The upload seems to go ok but never finishes. Finally I get message 'programmer not responding, not in sync'...
Hi Harry, You asked me what I am trying to do. I have connected everything as in the article. I am trying to program an atmega 328p which has a uno bootloader installed. This MCU is from Jaycar electronics. All the articles I can find talk about burning a bootloader. But if the bootloader is...
Pretty sure now of the problem I have downloading to the atmega 328p from Jaycar with the uno bootloader. I have been using the nano board.I do have the uno board but didn't like it as you have to plug in a lot of wires to use it. I have been using the nano board for a long time now as you can...
Hi, I am trying to program the Atmega 328p microcontroller from Jaycar. This is the one they say has a bootloader. I have made all the connections as required in the article. I am using com3 which I presume is a port on my laptop. I am trying the first option and not using the Arduino nano ...
Thanks Harry. When I pick Duemilanove on the board manager I get at the bottom of my screen Duemilanove on com3. Previously it was nano on com3. My arduino nano board. So that looks sweet. The port is mentioned. This is without connecting the adaptor board as you suggest to get the port.
Hoping...
In this scenario I am programming directly to the atmega 328p through its bootloader. I have already programmed the 328 and tested the code by programming to the nano board. Then looking up the board manager on the arduino ide I see mega and mega 2560. Could this mean the Atmega 328p for direct...
The article provided a way to program the 328 without using an arduino board. Several things I didn't understand about downloading. It says to name the port the 'usb to serial/ ttl adaptor' is connected to. What port would this be? Also it says to name the board type. What is the board type? And...