Circuit Design
Motivated by the difficulties to get surface
mounting components in the local electronic shops,
we decided to look for other alternatives with DIP
components (through-hole) that could be acquired
locally.
The first barrier was the microcontroller. The
suggested ATTiny proved to be difficult to get;
instead, the ATMega 8 was readily available in DIP
package.
![](images/avrisp3.png)
This served as a base to find an alternative to an AVR programmer USBasp by Thomas Fischl that included several alternatives using the DIP package and a single layer board. A render of the programmer can be seen below along with the schematic and board design in Eagle.
![](images/avrisp0.png)
![](images/avrisp6.png)
![](images/avrisp7.png)
The board was milled as before and the components
were soldered much easier than the surface mount
components due to its larger size.
![](images/avrisp1.png)
![](images/avrisp2.png)
![](images/avrisp5.png)
![](images/avrisp4.png)
In the end, the USB cable was soldered directly due
to a shortage of supply of the connector at the
local store. Additionally a 10 pin ribbon cable was
made for the programming operation.
![](images/avrisp8.png)
Progress
- Project Proposal
- 2D and 3D Model
- Laser Cut
- Circuit Making - FabISP
- 3D Scanning and Printing
- Electronics design
- Make Something Big
- Embedded Programming
- Molding and Casting
- Input Devices
- Composites
- Output Devices
- Networking
- Mechanical Design
- Interface
- Applications
- Invention
- Project Development
- Project Presentation
![](images/ceramic-3d-printer.jpg)
Alvaro J. Rojas Arciniegas, PhD
Assistant Professor Department of Automatics and Electronics - UAO
+57 (2) 318-8000 ext. 11384
![](images/xuao_logo5-02.png)