You saved me!
I inherited a bunch of Hakko heads without the base unit. Got an FM-202 on Ebay but forgot about the card.
At first I thought it didn't work, but I used yellow filament, and apparently the light inside the unit can pass through the yellow. Used silver and it works beautifully!
Thank you thank you!
SpareVolts
almost 8 years
Yes, it is 1x1 inch. The real one sticks out of the machine more, and is longer, but I didn't see the need for that.