The Teensy 4.1 also needs a heat sink (picture 2) because we are running it within the
specifications but with a slightly higher clock speed.
Figure 2
So the preliminary work is done for now.
2:) the SMD components
For a long time we have resisted using SMD components in DIY projects.
Unfortunately, certain components are only available as SMDs. To make soldering easier,
we have lengthened the pads on the board considerably.
And, to be honest, with a little practice, the components can be soldered without any
problems. Even by hand.
If you have ordered a board with soldered SMD ICs from TubeOhm, you can skip the next
chapter 'Soldering the SMD components - procedure'. If not - please read on.
In the Jeannie we use SOIC (small outline ICs) 14,16,8. These are just solderable.
Pay attention to pin 1 on the IC. If the IC is soldered the wrong way round, the whole
circuit will not work and in the worst case the board will be broken.
5
Summary of Contents for Jeannie
Page 7: ...Here is the front side of the board again Figure 5 Figure 6 7 ...
Page 8: ...And here is the back Figure 7 Figure 8 8 ...
Page 30: ...Here is the position of the AD converter Here is the position of the AD converter 30 ...
Page 31: ...This picture shows how the pin header of the DAC is soldered to the board 31 ...
