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Here is one way of getting around the problem.
If you have experience with SMD parts you may laugh at this method, if you are new to using SMDs you might find this useful.
Normally pre-sensitized boards, templates, and light boxes are use before etching. For the prototyping of a few parts the layout will be hand drawn on regular copper clad board.
The part I want to test here is a SMD voltage regulator, AMA8800AEETZ, 3.3 volt output.
Parts list:
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| The board is the same size as a TO-220 package. The traces are drawn with a permanent marker,"Sharpie". Allow the ink to dry before etching. Ink can be removed with isopropyl alcohol. Etch in a ferric-chloride solution and tin per manufactures instructions. Tinning is not needed but recommended as the finished part will be handled by hand. |
| The parts will be soldered on to the board using a solder paste with a standard, un-modified toaster oven. The oven needs to maintain 300 to 350 degrees Fahrenheit. The solder paste I use is made by Chipquick, part #SMD 291AX10. The paste is packaged in a syringe, so you do not need a stencil. Be careful not to use more paste than needed as pictured here. It causes the parts to float. The board is assembled on a piece of thin aluminum plate to help with heat transfer and handling in the oven. The un-tinned board is holding the header level. |
| As you can see, some of the parts "floated" a little but it works! Where else can you get a linear regulator with an "on LED"?  |
Re: serial LCD 1602 Backpack using PIC16F690 for Hitach HD44780
one last update:
jackberg1 - 1st November 2025, 17:11added an PGM Sw on RA3
to edit the baud rate:
turn off the LCD display, press & hold the PGM sw, turn on the LCD
line 1 will show "Press to Select" , line 2 : "Baud Rate:"...