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Andrew's Cave

7 posts
One of my kids has just started studying Arduino and she is working on simple projects. She wants to build her own Arduino someday but she still has a long way to go until reaching to that level. She is just barely doing the simple programming with knowing almost nothing about electronics. She is not good at soldering as well. I made an Arduino kit for her hoping it easily let her build her own Arduino clone and use it for her projects. I think it may also be helpful to others and I’d like ...
This will be the last posting about R2.   1. Limitations of R2 and the ideas for the enhancement.   a. R2 doesn’t support ATtiny with external clock. I decided not to make R2 support ATtiny with external clock because I don’t use this combination. I normally use ATtiny when I need to make something tiny or simple and I don’t want to add any component not necessary. Anyway, you may slightly modify the schematic to make the external clock supported. Please find ORANGE ...
This is the second part of R2 User Guide.   Programming   1) Placing the target microcontroller Make sure the power switch of R2 is off, set the voltage selection jumper to the voltage you want and put your microcontroller in its socket at the right position as shown below. * Place only 1 microcontroller at a time and the power switch should always be off when placing or removing microcontrollers. Please be noticed that the pin number 1 starts from the bottom left corner where the ...
This is the first part of R2 User Guide.   Parts   1) ATmega/ATtiny Microcontroller Programming Shield for Arduino As ISP R2. 2) Arduino UNO compatible microcontroller board: Genuine Arduino UNO R3 is recommended but most of all compatible boards will work with no problem. USB cable to hook it up to your PC is also required. 3) Microcontrollers to be programmed: Only 8 pin, 14 pin, 20 pin or 28 pin DIP(N) or 40 pin DIP types are supported. Supported microcontrollers. ATtiny 1 ...
The schematic is now ready to be shared. It is not my creation after all but a combinations of common reference designs out there with my little creativity. You may find my R2’s limitations from it if you have some knowledge on AVR programming. – Let’s talk about it later. Please understand that it won’t meet everyone’s requirements as it is solely made for myself. I’m sharing it out to be helpful to someone who needs it.     I’m also sh ...
I’m back with my “ATmega/ATtiny Microcontroller Programming Shield for Arduino As ISP R2”. This is a slightly enhanced version of R1 which I’ve been using for programming microcontrollers for long time. I’m now able to program most of all major DIP type ATmega/ATtiny microcontrollers with it.   As I’ve mentioned on my previous posting about R1, I’ll share its details. Please find the BOM here first. I’ll also post the schematic, PCB des ...
ATmega/ATtiny Microcontroller Programming Shield for Arduino As ISP R1   I like using ATmega/ATtiny microcontrollers for my projects. I normally use Arduino IDE and Arduino As ISP to program them. I built a shield for the programming by myself for my convenience, instead of using a breadboard or other products. This is my “ATmega/ATtiny Microcontroller Programming Shield for Arduino As ISP R1”. I’ve been using it for quite long time with no issue but I’ve re ...