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Step 8Let the Ink Dry, Inspect, Do Small Touch-ups
Sharpie ink holds up better in the etch bath if you let it dry for a while. Not sure how long "a while" is, but I tend to wait 5-10 min or so.
This gives you time to double-check the circuit, look out for accidental connections, and scratch some kinda design into the ground plane just for fun.
Here, I ended up scraping a little ink from between two pads -- not because they connected, but because they were a little close for pads which would be carrying high current.
Then, thinking about high current, I widened up some of the traces.
Finally, I scratched a transistor symbol into an open part of the ground plane. (It's hard to think up a good logo on the spot in the 5 min it takes Sharpie to dry.)
You can use a component lead, sewing pin, paper clip, or something similar to scrape off the ink. I used the non-business end of a small drill bit.
This gives you time to double-check the circuit, look out for accidental connections, and scratch some kinda design into the ground plane just for fun.
Here, I ended up scraping a little ink from between two pads -- not because they connected, but because they were a little close for pads which would be carrying high current.
Then, thinking about high current, I widened up some of the traces.
Finally, I scratched a transistor symbol into an open part of the ground plane. (It's hard to think up a good logo on the spot in the 5 min it takes Sharpie to dry.)
You can use a component lead, sewing pin, paper clip, or something similar to scrape off the ink. I used the non-business end of a small drill bit.
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