Electronic Basics #6: Standalone Arduino Circuit
video description
1) Do the same as GreatScott! did for the breadboard part except that the 10kOhm resistor goes to 5V!
2) Take the ftdi programmer.
3) DTR goes to one side of a 100nF ceramic capacitor and the other side of the capacitor goes to reset.
4) TX, RX and vcc go like normal.
5) CTS goes to GND (GreatScott! 's ftdi I think didn't have a CTS port.
6) GND goes to GND.
In the Arduino IDE, select Arduino UNO as your board and the port is the FTDI's one.
Thanks for reading and for those who had the problem, I hope they managed to solve it and didn't throw the ATMega away as I was about to do: .
Date: 2020-09-05
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Comments and reviews: 9
Steve
All these tutorials mess up the crystal capacitor values, typically they use 20pf caps for a crystal with a load capacitance of 20pf, WRONG, there is a formula to work out the correct cap values. To put it as simple as possible, you are using 2 caps in series that halves the total, also the crystal with pads and tracks has a few pf built in capacitance, so it becomes 40pf minus the built in capacitance will give 36pf as the value for the two load capacitors for a 20pf crystal!
reply
All these tutorials mess up the crystal capacitor values, typically they use 20pf caps for a crystal with a load capacitance of 20pf, WRONG, there is a formula to work out the correct cap values. To put it as simple as possible, you are using 2 caps in series that halves the total, also the crystal with pads and tracks has a few pf built in capacitance, so it becomes 40pf minus the built in capacitance will give 36pf as the value for the two load capacitors for a 20pf crystal!
reply
Rizaldi
Man, i reverse the voltage of atmega. the circuit was ready in beardboard. all 5V to 5v column, Ground to ground column. But i didn't notice the colour cable of column 5v and ground,
When i was uploading, the IDE said the programmer not responding. The i realize it, put the right cable. Reupload the coding and every still work fine, awesome!
reply
Man, i reverse the voltage of atmega. the circuit was ready in beardboard. all 5V to 5v column, Ground to ground column. But i didn't notice the colour cable of column 5v and ground,
When i was uploading, the IDE said the programmer not responding. The i realize it, put the right cable. Reupload the coding and every still work fine, awesome!
reply
John
Hello! I'm wanting to make a standalone circuit like this but with USB communication. I searched through your videos but couldn't find a video showing this (Maybe I missed it. Would you happen to know how someone would do that? Would I just connect the TX and RX pins to D- and D+?
reply
Hello! I'm wanting to make a standalone circuit like this but with USB communication. I searched through your videos but couldn't find a video showing this (Maybe I missed it. Would you happen to know how someone would do that? Would I just connect the TX and RX pins to D- and D+?
reply
Jordan
How do we know what external components we need and how to wire them up for a specific AVR Microcontroller? I couldn't find a diagram with the crystal / capacitors in the ATmega328 datasheet, so how can we figure out how we should set it up with different microcontrollers?
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How do we know what external components we need and how to wire them up for a specific AVR Microcontroller? I couldn't find a diagram with the crystal / capacitors in the ATmega328 datasheet, so how can we figure out how we should set it up with different microcontrollers?
reply
Ivan4es1
Is it possible, to get out native ATMEGA328 chip from Arduino Uno, put in new clean ATMEGA328 chip with loader, program it, then put it out and use separatly as shown on video?
Simply - using Arduino Uno as programer for other ATMEGA328?
reply
Is it possible, to get out native ATMEGA328 chip from Arduino Uno, put in new clean ATMEGA328 chip with loader, program it, then put it out and use separatly as shown on video?
Simply - using Arduino Uno as programer for other ATMEGA328?
reply
SevDev
Very interesting, but the Arduino Nano seem to be only a little bit more expensive than the ATMEGA328P I found on Alixpress. For learning something it might still be useful to build that but to cut the costs and size not so much anymore.
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Very interesting, but the Arduino Nano seem to be only a little bit more expensive than the ATMEGA328P I found on Alixpress. For learning something it might still be useful to build that but to cut the costs and size not so much anymore.
reply
Mohammed
It's so helpful, thank u so much.
Well now is it possible to burn an atmega bootloader using USB to TTL only without an arduino uno chip? and if so how?
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It's so helpful, thank u so much.
Well now is it possible to burn an atmega bootloader using USB to TTL only without an arduino uno chip? and if so how?
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Ankush
Work done above is absolutely Great but I am looking to apply whole process on atmega2560
Does it still the same or something additional is required?
reply
Work done above is absolutely Great but I am looking to apply whole process on atmega2560
Does it still the same or something additional is required?
reply
Marc
Hi to which pins do I need to connect serial clock and serial data for I2C?
There are special pins for is on Arduino boards.
Thanks
reply
Hi to which pins do I need to connect serial clock and serial data for I2C?
There are special pins for is on Arduino boards.
Thanks
reply
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