Added 8 LED (small squares at bottom) along with inline resistor network. Added T1 LED for power indicator, moved UART connector to right of PIC socket (simplify trace layout), Added full vector board area than can be cutoff if not needed, all pins of PIC come out to edge connctor strip, dual regulators to allow 5V and 3.3V selection, added PB to MCLR.
Any questions ?
The cost of the boards:
Approx:
With vector Bd area $34 ea.
Without Vector Bd area $12 ea.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
THese boards will cost me $103 for three of the ones with attached vector area.
The boards without the vector area come to about $12 ea. (the extra board area and holes add up fast)
If anybody wants any I can send yu the files but they are only good for Express PCB, which makes great boards.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
No Values, put in any value or none. These boards are unpopulated, use whatever values you want, same goes for resistors and the PIC if pin compatable.
I am doing these for myself but will offer the layout and schematic (when done ??) for any body who wants to order them thru Express PC, or a few from me.l
Last edit: Paul Haug 2017-04-28
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Thats's good of you to offer. PCB is not my forte thing to do,chemistry lab...scientific wine making is dif. honest. my wine erases everything! :) sorry,off topic.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I do not make the boards, they are professionally made by ExpressPCB which also supplies free layout program and a free schematic program, both of which I used for this layout.
Last edit: Paul Haug 2017-04-28
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
This is the board as I ordered it today. I have ordered three boards, that is the minimum order, but each board will contain two circuits, thus six circuit boards after I cut them in half.
Also attached is the schematic. All pins of the PIC come out to the edge pin connector pin for pin.
Most component values are not shown as it would be up to the particular application what values if any would be installed
Because of the large cost increase I decided not to include a vector board as part of the layout. Since all pins come out to the edge of the PCB board simply add an existing PCB vector board.
.
Thanks to all who provided suggestions and help.
Paul
Here is the printed circuit board assembled and plugged into a breadboard. PIC pins 1 thru 24 all come out to the edge connector that is plugged into the breadboard. Due to pc board length restrictions pins 25 thru 28 are on the short left edge. The pickit3 program cable is plugged in to the programming pins.
8 LEDs are on the left, connected to port B 0 – B7, some are on and some are off in the photo for some A/D testing.. The white one is due to lighting relection.
This layout is for the 28 pin PIC18F26K20, although other pics may work as well.
Two open collector MOSFET N-channel at the top.
Three pins at the top left are two A/D inputs. The A/D input filter resistors are not installed.
At the top right are 6 pins, two for + power, two for ground, two for the open collector FETS.
On the right center are open holes for the 78xx (3.3) volt regulator and filter cap.
Near the yellow cap is the jumper to select which regulator to use.
Near the bottom left is the 3 pin UART connector.
Bottom right is the pickit3 programming conector.
The PC board is layed out for 1/8 watt, I only had ¼ watt, but they fit with a little persuasion.
Added 8 LED (small squares at bottom) along with inline resistor network. Added T1 LED for power indicator, moved UART connector to right of PIC socket (simplify trace layout), Added full vector board area than can be cutoff if not needed, all pins of PIC come out to edge connctor strip, dual regulators to allow 5V and 3.3V selection, added PB to MCLR.
Any questions ?
The cost of the boards:
Approx:
With vector Bd area $34 ea.
Without Vector Bd area $12 ea.
THese boards will cost me $103 for three of the ones with attached vector area.
The boards without the vector area come to about $12 ea. (the extra board area and holes add up fast)
If anybody wants any I can send yu the files but they are only good for Express PCB, which makes great boards.
I will provude the layout files to anyone who wants them. I will be ordering a set of boards early next week.
i
One more with silkscreen only, shows whats where .
Some people would be picky about caps around regulators,how many,type and value...I'm not :)
No Values, put in any value or none. These boards are unpopulated, use whatever values you want, same goes for resistors and the PIC if pin compatable.
I am doing these for myself but will offer the layout and schematic (when done ??) for any body who wants to order them thru Express PC, or a few from me.l
Last edit: Paul Haug 2017-04-28
Thats's good of you to offer. PCB is not my forte thing to do,chemistry lab...scientific wine making is dif. honest. my wine erases everything! :) sorry,off topic.
I do not make the boards, they are professionally made by ExpressPCB which also supplies free layout program and a free schematic program, both of which I used for this layout.
Last edit: Paul Haug 2017-04-28
This is the board as I ordered it today. I have ordered three boards, that is the minimum order, but each board will contain two circuits, thus six circuit boards after I cut them in half.
Also attached is the schematic. All pins of the PIC come out to the edge pin connector pin for pin.
Most component values are not shown as it would be up to the particular application what values if any would be installed
Because of the large cost increase I decided not to include a vector board as part of the layout. Since all pins come out to the edge of the PCB board simply add an existing PCB vector board.
.
Thanks to all who provided suggestions and help.
Paul
Last edit: Paul Haug 2017-05-03
Here is the printed circuit board assembled and plugged into a breadboard. PIC pins 1 thru 24 all come out to the edge connector that is plugged into the breadboard. Due to pc board length restrictions pins 25 thru 28 are on the short left edge. The pickit3 program cable is plugged in to the programming pins.
8 LEDs are on the left, connected to port B 0 – B7, some are on and some are off in the photo for some A/D testing.. The white one is due to lighting relection.
This layout is for the 28 pin PIC18F26K20, although other pics may work as well.
Two open collector MOSFET N-channel at the top.
Three pins at the top left are two A/D inputs. The A/D input filter resistors are not installed.
At the top right are 6 pins, two for + power, two for ground, two for the open collector FETS.
On the right center are open holes for the 78xx (3.3) volt regulator and filter cap.
Near the yellow cap is the jumper to select which regulator to use.
Near the bottom left is the 3 pin UART connector.
Bottom right is the pickit3 programming conector.
The PC board is layed out for 1/8 watt, I only had ¼ watt, but they fit with a little persuasion.
Last edit: Paul Haug 2017-05-18