The process of building your first Printed Circuit Board (PCB) has never been easier, inexpensive, and faster than it is right now. We will walk through a recent project from concept to final product where I was tasked with building an electronic badge for a user conference. There are many choices for free and easy to use Integrated Development Environments (IDE) for programming microcontrollers. There are multiple CAD packages for designing your circuits and laying out the PCB. The cost and turnaround times for having beautiful PCBs and it's associated components show up at your door are hard to believe.
Anyone interested in cranking out your first PCB, programming microcontrollers, or even discussing high-level techniques (reflow/iron) for soldering surface mount devices (SMD) to your PCB will walk away well prepared to start or extend your journey as a maker.
5. Vendor Specific CTF Competition
Complexity given 60 days
Project consideration/requirements:
Complexity – audience is Blue
My 1st badge - KISS
Low cost – my $
Identify STAFF during event
Identify EXEC for sponsoring
Awesome WINNER giveaway
Self Solder kits for enthustasts
Include a clever easter egg
6. Badge Concept
LEDs to spell something with swipe
Artwork to match storyline
Simple crypto message
Solder time < 10 minutes
Low Failure rate
Multiple LED patterns
7 LED high chars
1 button
Microchip with mem and GPIO
Battery (after verify general power calcs)
8. Prototyping - Design
Notice the use of a decoupling cap
Needed a 5 pin Programming Port
- troubleshooting
- programming port for microchip
9. Prototyping - Power
Examine the universal CR2032 battery (3.0V at 225mAH to 2V)
LED
FV=2.2V
current = (3.0V-2.2V)/1kΩ = .8 mA
* decent R – below forward DC current max of 30 mA
* below GPIO max amperage of 20 mA
All LED ON Consumption = 5.6 mA (7*.8mA)
Microcontroller consumption = 8 µA (negligible)
CR2032 Power is 225mA Hrs
* 225 mAH / 5.6mA = 40.1 Hours operation time
***Almost exactly matched “All On” QA test
3.0V
GPIO
output
FV=2.2V
10. Prototyping - SMDs
* Testing multiple SMD R/LEDs: Color, Lumens,
Viewing Angle , Curent
* Circuit Board Thermal Transfer Paper A4 size
Transfer Paper DIY Circuit Board Special Paper
11. Prototyping
Inexpensive and Sturdy
SOIC->DIP board
May still need a solution for
programming multiple
microcontrollers
Schmartboard 204-0004-01 Protoboard, Soic To Dip, 1.27 mm
Pitchannel for 8 18 and 28. $13.09
12. Prototyping
14SO15-D3-ZO 14 Pin SOP open top ZIF 1 $ 65.00
socket adapter with round pins. $ 65.00
Expensive
ZIF Socket (SMD)->DIP board
Easy to batch program
microcontrollers
Useful if you are going to
provide DIY kits
14. Prototyping
Do yourself a favor and grab a decent programmable power supply.
DP20V2A 30V5A 50V5A DPS3003 DC32V/3A Step down Programmable Power Supply Module - $17.85
16. Microcontroller PIC16F15325
Chose Microchip largely because of the Integrated Dev
Environment (IDE) providing:
C Compiler – keep me out of assembly
Programmer/Debugger
Code Configurator – GUI into init and objects
28. Electronic Schema Editor
1. Place Schematic Symbols
2. Use symbols from my Custom Library
* Create custom symbols in Library Editor later
* We will deal with physical footprints later
Symbols in a custom
Library
29. Electronic Schema Editor
1. Place Schematic Symbols
2. Use symbols from my Custom Library
3. Connect the pins with wires
4. Use “No Connects” on pins with no connection
5. Use VDD and GND labels – cleaner than wires
30. Electronic Schema Editor
1. Place Schematic Symbols
2. Use symbols from my Custom Library
3. Connect the pins with wires
4. Use “No Connects” on pins with no connection
5. Use VDD and GND labels – cleaner than wires
6. Perform Electrical Rules Check
7. Finally, Generate a netlist
33. Schematic Library Editor
The only symbols in the middle pane
that needed to be custom created
were:
KiCad ships with a massive collection of
symbols and footprints
DNP U1
40. PCB Editor
1. Import the netlist
2. Alilgn the footprints to the F.Cu and
B.Cu layers
41. PCB Editor
1. Import the netlist
2. Alilgn the footprints on the F.Cu and
B.Cu layers
3. Lay your tracks and vias
42. PCB Editor
1. Import the netlist
2. Alilgn the footprints to the F.Cu and
B.Cu layers
3. Lay your tracks and vias
4. Draw your board cutlines on the
Edge.Cuts layer
43. PCB Editor
1. Import the netlist
2. Alilgn the footprints to the F.Cu and
B.Cu layers
3. Lay your tracks and vias
4. Draw your board cutlines on the
Edge.Cuts layer
5. Add to the F.SilkS and B.SilkS layers
47. Final Step – Plot Gerber Files
The Gerber format is an open ASCII vector format for 2D
binary images.[1] It is the de facto standard used by printed
circuit board (PCB) industry software to describe the
printed circuit board images: copper layers, solder mask,
legend, etc.
https://en.wikipedia.org/wiki/Gerber_format
49. Manufacture
1. Provide your PCB dimensions
2. Provide the Quantity
3. Click Calculate button
4. Complete Shipping
5. Add to Cart
50. Manufacture
1. Provide your PCB dimensions
2. Provide the Quantity
3. Click Calculate button
4. Complete Shipping
5. Add to Cart
6. Upload your Gerber Files
* An Engineer will review your
design within an hour and approve
for payment
51. Manufacture
1. Provide your PCB dimensions
2. Provide the Quantity
3. Click Calculate button
4. Complete Shipping
5. Add to Cart
6. Upload your Gerber Files
7. Watch them make your PCB
55. Feel free to reach out
Jim Apger - @jimapger
QUESTIONS?
Notes de l'éditeur
Current flows top to bottom
The flow of electrons is termed electron current. Electrons flow from the negative terminal to the positive. Conventional current or simply current, behaves as if positive charge carriers cause current flow. Conventional current flows from the positive terminal to the negative.
DNP = Do Not Populate
MG Chemicals Ferric Chloride Liquid, 1 Quart Bottle, Dark Brown
10 PCB Circuit Board Thermal Transfer Paper A4 size Transfer Paper DIY Circuit Board Special Paper
SUNNYSIDE CORPORATION 84032 1-Quart Acetone
Teenitor Top Quality 20Pcs 100x70x1.5mm Single Sided Copper Clad Laminate PCB Circuit Board
The constant voltage and constant current programmable control power supply module is cabinet and delicate, and it put the collection of analog integration and digital control functions in one. Its adjustable output voltage range is 0-20.0V, step by 0.1V. Its adjustable output current range is 0-2.00A, step by 0.01A. Boot voltages can be stored freely and the model has two groups of quick storage voltage. Compared with the traditional analog power supply, it is more convenient to quickly extract the voltage or current required. LCD display on the model has the function digital voltmeter and ammeter. You can view the preset voltage, input voltage, output voltage, the preset current, output current, output power and LCD brightness. 2.Technical parameters Weight: 59g/piece Dimension: 79mm*42mm*26mm (L*W*H) Open size: 71mm*39mm Input positive: IN+ Input negative: IN- Output current: 0-2.00A Output power: Maximum 40W Output positive: OUT+ Output negative: OUT- Ripple frequency: About 330 KHz Input voltage range: 4.5-23V(23V is the limiting highest voltage. When you use it, make sure input voltage below 23V) Output voltage range: 0V-20.0V(In step down voltage mode, input voltage must be higher than 3V),the control button can fast draw up 2 sets data. Ripple peak to peak value: 50mv (typical value) 3. Direction for use 3.1:Display introduction: U-IN:input voltage U-SET:preset voltage U-OUT:output voltage I-SET: Preset current I-OUT:output current POWER:output power M-PRE:shortcut store LED:background brightness M1:shortcut store1 M2:shortcut store 2 S-MD:setting the mode R-MD:normal operation ON/0FF: open/shut down the module output 3.2key function instruction: SET:Function setting, function confirmation; m1 :Shortcut extract M1 stored data/Upturning to choose/shortcut store. m2:Shortcut extract M2 stored data/Page down to choose/shortcut store ON/OFF:open or close voltage output.
Netlist is a collection of connections and objects that will get imported into the PCB Editor. Next Step will be to Perform Part Associations.
KiCad ships with multiple Libraries containing tons of symbols and footprints.
DNP=Do not Place
KiCad ships with multiple Libraries containing tons of symbols and footprints.
DNP=Do not Place
KiCad ships with multiple Libraries containing tons of symbols and footprints.
DNP=Do not Place
