|As Designed in DipTrace|
The Teensy will plug into the top of the Shield. After several iterations and corrections of schematic I we have a layout.
Today, I used the Toner Transfer Method to create the board. High resolution two sided boards are tough but they can be done. The Teensy Programming Shield is .75" x 1.75" with 8 mil traces.
|Etched and Ready for Inspection|
|The Etch Looks Good|
and both sides look like they are in good alignment
These are 8 mil Traces, and 6 mil Ground Grid
|Tinnit was used for Tin Plating|
|Tinnit works well, with good coverage,|
but it is very thin (.004").
Cut, Drilled and Parts are loaded, in this case Headers and one jumper.
|Ready to Use !|
In use, the Teensy will cover the first 24 pins (far end), short jumpers will be used if need for the none standard Teensy pin locations. For ISP Programming effort, only one jumper will be required - the RST pin.
With the Teensy plugged in hopefully there will be enough space to plug in the programmers? To use the Shield to program the Teensy, a short jumper is still needed between the RST pin (on end of the Teensy) and the third pin on the near open socket holes. That hole, is connected to the RST pin on the 6 pin Programming Header. We could have included dedicated RST pin and socket as part of the Shield, but that would require we alter the Teensy with a dedicated pin, disallowing it to be used directly with simple circuits on protoboards.
|The Teensy is Installed, Ready for Programming,|
It can be used
In or Out of a Protoboard