View source for Extension Explorer 16

[[Category:Ongoing_Projects]]
= Description =
''In French'':
Création d'une carte d'extension pour la carte Explorer (PROJET: [https://fixme.ch/wiki/Explorer_16_DSPIC Carte Explorer 16] & [https://fixme.ch/wiki/Coursera_Microcontroleur Exos sur les uC]).

* V1: un montage permettra de simuler un carrefour routier, composer de 4 feux (RGB)
* V2: montage permettant d'allumer séquentiellement des leds pour afficher le nom de FIXME   


'' in English'': 
creation of one extansion board for the Explorer Board (see the links above) 

* V1: assembly will allow to simulate a crossroad (4 fires (RGB))
* V2: assembly allowing to display sequentially the leds to screen FIXME

= Digram - Schematic =


== Cross Light Part ==
<gallery>
File:Schema feux.JPG| Schema Feux Tricolores - Kicad
File:H1 schema.jpg|bloc H1 - General - Orcad
File:Cross light.jpg|bloc H2 - Cross Light part - Orcad
</gallery>

== LEDS DISPLAY FIXME ==

<gallery>
File:Lettre F.jpg | Fixme Display - lettre F - Orcad
File:Lettre_I.jpg | Fixme Display - lettre I - Orcad
File:Lettre X.jpg | Fixme Display - lettre X - Orcad
File:Lettre M.jpg | Fixme Display - lettre M - Orcad
File:Lettre E.jpg | Fixme Display - lettre E - Orcad
</gallery>

= Part Calculation of Electronics Digram =
== LED's for crossroad  ==
* the datasheet of the DSP implemented on the Explorer Board 16 (see pages 1 & 273) indicates that :  
** output current of I/O : I = 10mA
** voltage I/O : VDD = 3.3V 

* the datasheet of the red LED (see pages 3) indicates that : 
** conduction voltage : ULR = VF = 1.8V 
** average current : I = 20mA  

* the datasheet of the orange LED (see pages 3 / 4 / 5) indicates that : 
** conduction voltage : ULO = VF = 1.9V 
** average current : I = 30mA  
 
* the datasheet of the green LED (see pages 3 / 4 / 5) indicates that : 
** conduction voltage : ULG = VF = 2.2V 
** average current : I = 30mA  

=== Formula ===
* calculation of resistance R_LED_R :  
<math>
R_{LED_R}=\frac{U_r}{I}=\frac{V_{DD}-U_{LR}}{I}=\frac{3.3V-1.8V}{10mA}
</math>
= ''' 150 &Omega; '''
* power dispersed by the resistance P_R_LED_R :
<math>
P_{R_{LED_R}}=\frac{R_{LED_R}^2}{I}=\frac{150^{2}}{10mA}
</math> 
= ''' 15 mW ''' 
  
* calculation of resistance R_LED_O :
<math>
R_{LED_O}=\frac{U_r}{I}=\frac{V_{DD}-U_{LO}}{I}=\frac{3.3V-1.9V}{10mA}
</math> 
= ''' 140 &Omega;'''  
* power dispersed by the resistance P_R_LED_O :  
<math>
P_{R_{LED_O}}=\frac{R_{LED_O}^2}{I}=\frac{140^{2}}{10mA}
</math> 
= ''' 14 mW '''  

* calculation of resistance R_LED_G : 
<math>
R_{LED_G}=\frac{U_r}{I}=\frac{V_{DD} - U_{LG}}{I}=\frac{3.3V-2.2V}{10mA}
</math> 
= ''' 110 &Omega; ''' 
* power dispersed by the resistance P_R_LED_G :  
<math>
P_{R_{LED_G}}=\frac{R_{LED_G}^2}{I}=\frac{110^{2}}{10mA}
</math> 
= ''' 11 mW '''

== Switch for crossroad ==
* the datasheet of the DSP implemented on the Explorer Board 16 (see pages 1, 278, 279) indicates that :  
** output current of I/O : I_output = 10mA
** input current of I/O : I_output max = 5mA
** voltage I/O : VDD = 3.3V 
** leakage current of I/O : 2uA 
** low state ('0') in voltage : 0,2 * VDD

=== Formula ===
* voltage seens by the input of uC when it's a low state '''VDD_low''' : 
<math>
VDD_{low} = VDD \cdot 0.2 = 3.3 \cdot 0.2 
</math>
= ''' 0.66 V'''

* Resitor seens by the input of uC when it's a low state '''RIN_low''' : 
<math>
RIN_{low} = \frac{VDD_{low}}{I_L} = \frac{0.66}{2u} 
</math>
= ''' 330 k&Omega;'''

* Resitor Pull-Up MAX : 
<math>
R_{Pull-Up_{max}} = \frac{VDD - VDD_{low}}{I_L} = \frac{3.3 - 0.66}{2u} 
</math>
= ''' 1.32 M&Omega;'''

''Remark'' : the resistor must be more less that the R_PULL-UP_max - usually, the value of 10kohm is using for the resistor pull-up. 

* Current using when the switch is closed 
<math>
I_{R_{Pull-Up}} = \frac{VDD - VDD_{low}}{R_{Pull-up}} = \frac{3.3 - 0.66}{10k} 
</math>
= ''' 264 uA'''

* power dispersed by the resistance push-pull when the switch is actived 
<math>
P_{R_{Pull-Up}} = (VDD - VDD_{low}) \cdot I_{R_{Pull-Up}} = (3.3V - 0.66V)\cdot 262uA  
</math>
=''' 696.96 uW'''

== LEDS For DSIPLAY FIXME ==
=== Details arround the LED Segment ===
''In French'' : pour cette partie du projet, le choix s'est porté sur des multi leds de type L-132CB, le but est que tous les segments verticaux s'allument en meme temps et tous les leds horizontales s'allume une après l'autre. Pour les segments verticaux, si on chaîne les 5 leds du segment (série), on obtient du 10V sur les 5 leds... donc il faut prévoir pour le montage une alimentation 12V DC qui tienne 1A au minimum. Pour les segments horizontaux, c'est qu'une led par segment qui sera alimenté -> 2V par led.  

''IN English'': For this part of the project, the choice was carried on the multi LED L-132CB, the goal is that all vertical segment display in same time ans the horizontal leds display one after the others. For the vertical sgment, the leds will be chained in serial (5 leds -> 10V). For this assembly to provide for the power, a voltage of 12V. For the horizontal segment, there will have only 1 led supplied (2V). 

to see more details, check the schematics part !!!
  
=== Datas ===

* U_POW = Vcc = 12V DC --> choice concerning the power supply of LED segments
* U_LED = 2V DC                --> voltage on once leds 
* U_SEG = 5*U_LED = 5*2V = 10V --> voltage on once segment   
* I_LED = 20mA                 --> current use by once led

=== Calculation === 
==== Resistor in end line for vertical sgement ====
if the segment is alone, the end line resistor is of (example each element of the X letter) :

<math>
R_{1Seg} = \frac{Vcc - U_{seg}}{I_{LED}} = \frac{12V - 10V}{20mA}
</math>
= '''100 &Omega;'''

Power dissipated by the resistor Rseg: 

<math>
P_{R_{1Seg}} = R_{1Seg} \cdot I_{Led}^2 = 100 \cdot (20mA)^2 
</math>
= '''40 mW'''

The choice for the resistor(s) value is : '''100 &Omega; 1/4W'''

if the segments are linked by two, the end line resistor is of (example for the F, I, M, E  letters) :

<math>
R_{1Seg} = \frac{Vcc - U_{seg}}{I_{LED_{Seg1}} + I_{LED_{Seg2}}} = \frac{12V - 10V}{20mA + 20mA}
</math>
= '''50 &Omega;'''

Power dissipated by the resistor Rseg: 

<math>
P_{R_{1Seg}} = R_{1Seg} \cdot (2*I_{Led})^2 = 100 \cdot (40mA)^2 
</math>
= '''80 mW'''

The choice for the resistor(s) value is : '''51 &Omega; 1/4W'''

==== Resistor in end line for horizontal sgement ====
if the segment is alone, the end line resistor is of (example each element of the M letter) :

<math>
R_{1LED} = \frac{Vcc - U_{seg_{LED}}}{I_{LED}} = \frac{12V - 2V}{20mA}
</math>
= '''500 &Omega;'''

Power dissipated by the resistor R_LED: 

<math>
P_{R_{1LED}} = R_{1LED} \cdot I_{Led}^2 = 500 \cdot (20mA)^2 
</math>
= '''200 mW'''

The choice for the resistor(s) value is : '''510 &Omega; 1/4W'''

if the segments are linked by two, the end line resistor is of (example for the F letter) :

<math>
R_{LEDs} = \frac{Vcc - U_{LED}}{I_{LED1} + I_{LED2}} = \frac{12V - 2V}{20mA + 20mA}
</math>
= '''250 &Omega;'''

Power dissipated by the resistor RLED_2:

<math>
P_{R_{LEDs}} = R_{LEDs} \cdot (2*I_{Led})^2 = 250 \cdot (40mA)^2 
</math>
= '''400 mW'''

The choice for the resistor(s) value is : '''270 &Omega; 1/2W'''

if the segments are linked by three, the end line resistor is of (example for the E letter) :

<math>
R_{LEDs} = \frac{Vcc - U_{LED}}{I_{LED1} + I_{LED2} + I_{LED3}} = \frac{12V - 2V}{20mA + 20mA +20mA}
</math>
= '''167 &Omega;'''

Power dissipated by the resistor RLED_3:

<math>
P_{R_{LEDs}} = R_{LEDs} \cdot (3*I_{Led})^2 = 250 \cdot (60mA)^2 
</math>
= '''601,2 mW'''

The choice for the resistor(s) value is : '''180 &Omega; 1W'''

= Layout =
<gallery>
File:PCB Cross fire Ext16.JPG|Extension Explorer 16 - cross fire - PCB Feux Tricolores - Kicad
File:Routage CrossFire Board.jpg|H1 Cross Light - Layout - Orcad
</gallery>

= BOM - Bill of Material =
== Cross Fire Part ==

 {| class="wikitable" style="text-align:center;"
 |+ BOM for the Feux Tricolor 
 |-
 ! scope="col" | Designation 
 ! scope="col" | Nb de composants
 ! scope="col" | Fournisseur
 ! scope="col" | Référence 
 ! scope="col" | Prix 
 |-
 | Led Rouge 5mm
 | 4
 | Farnell 
 | 2112111
 | 0.307 CHFrs /pieces
 |-
 | Led Rouge SMD (option)
 | 4
 | Farnell 
 | 8554641
 | 0.0982 CHFrs /5pieces
 |-
 | Led Orange 5mm
 | 4
 | Farnell 
 | 1003212
 | 0.257 CHFrs /pieces
 |-
 | Led Orange SMD (option)
 | 4
 | Farnell 
 | 8554552
 | 0.537 CHFrs /5pieces
 |-
 | Led Verte 5mm
 | 4
 | Farnell 
 | 2217954
 | 0.368 CHFrs /pieces
 |-
 | Led Verte SMD (option)
 | 4
 | Farnell 
 | 8554609
 | 0.326 CHFrs /5pieces
 |-
 | Resistance SMD 110 ohm 100mW
 | 4
 | Farnell 
 | 2351021
 | 0.01 CHFrs /pieces
 |-
 | Resistance SMD 140 ohm 100mW
 | 4
 | Farnell 
 | 2351049
 | 0.01 CHFrs /pieces
 |-
 | Resistance SMD 150 ohm 100mW
 | 4
 | Farnell 
 | 9332596
 | 0.0734 CHFrs / 50pieces
 |-
 | Resistance SMD 10kohm 100mW
 | 4
 | Farnell 
 | 9332391
 | 0.082 CHFrs / 50pieces
 |-
 | Commutateur Tactile 
 | 1
 | Farnell 
 | 1555985
 | 0.155 CHFrs /pieces
 |- 
 | Connecteur 120pin
 | 1
 | Digikey 
 | MEC1-160-02-S-D-A or MEC1-160-02-F-DEM2 
 | 9.3 $/pieces
 |}

== LED DISPLAY FIXME ==

 {| class="wikitable" style="text-align:center;"
 |+ BOM for the FIXME Display 
 |-
 ! scope="col" | Designation 
 ! scope="col" | Type de boitier
 ! scope="col" | Nb de composants
 ! scope="col" | Fournisseur
 ! scope="col" | Référence 
 ! scope="col" | Prix 
 |-
 | MULTI LEDS (5 led par boitier) L-132CB
 | 35mm x 6.1mm
 | 21
 | Farnell
 | 1208841
 | 3.75 CHF/pieces
 |-
 | DEMULTIPLEXEUR SIMPLE - CBT3251PW
 | TSSOP-16
 | 4 
 | Farnell
 | 2445292
 | 0.2 CHF/pieces
 |-
 | Transistor MOSFET - FDD3N40TM
 | TO-252AA
 | 29 
 | Farnell
 | 2453399
 | 0.6 CHF/pieces
 |-
 | Connecteur BASSE TENSION - MJ-179PH
 | - 
 | 1
 | Farnell
 | 1737246
 | 1.2 CHF/pieces
 |-
 | Condensateur SMD 100nF/16V - CC0805KRX7R7BB104 
 | 0805
 | 4
 | Farnell
 | 644160
 | 0.45 CHF/10x pieces min
 |-
 | Resistance SMD 51o/1/4W - WR12X51R0FTL
 | 1206
 | 5
 | Farnell
 | 2502655
 | 0.25 CHF/50x pieces min
 |-
 | Resistance SMD 270o/1/2W - ERJP6WF2700V
 | 0805
 | 5
 | Farnell
 | 2253894
 | 0.70 CHF/5x pieces min
 |-
 | Resistance SMD 100o/1/4W - ERJP6WF2700V
 | 0805
 | 4
 | Farnell
 | 2502669
 | 0.30 CHF/100x pieces min
 |-
 | Resistance SMD 510o/1/4W - WR08X5100FTL
 | 0805
 | 10
 | Farnell
 | 2502738
 | 0.30 CHF/100x pieces min
 |-
 | Resistance SMD 180o/1W - ERJB1AF181U
 | 2010
 | 5
 | Farnell
 | 2293954RL
 | 0.45 CHF/150x pieces min
 |-
 |}

= Assembly = 

<gallery>
File:Montage VerroBoard Explorer16.jpg|montage en VerroBoard Feux Tricolores
</gallery>

= Tests = 
<gallery>
File:Test Cross Fire1.jpg|Test Feux Tricolores -> feux rouges 
File:Test Cross Fire2.jpg|Test Feux Tricolores -> feux verts
</gallery>

* [https://youtu.be/wS60usULVGc Petite vidéo des premiers tests fonctionnels, soyez indulgent]

= Modification =

= Documentation =
== PDF FILE == 
* datasheet on the RED/ORANGE/GREEN LED -> AVAGO [[File:LED RED.pdf]]
* datasheet on the RED/ORANGE/GREEN LED SMD -> AVAGO [[File:LED SMD.pdf]]
* datasheet of one touch commande (microswitch tactile) -> ALCOSWITCH [[File:Microswitch.pdf]]
* datasheet on DEMUX 1:8 -> NXP -> CBT3251 [[File:CBT3251.pdf]]
* datasheet on MOSFET Canal P -> Faishild -> FDD3N40 [[File:MOSFET_P_FDD3N40.pdf]]
* datasheet on MOSFET Canal P -> OPTO IMAGE -> L-132CB ou BA0520HR5A [[File:LED L-132CB.pdf]]

== required links ==
* [http://www.edaboard.eu/calculer-un-resistance-de-pull-up-t374493.html explication sur le calcul d'une résistance Push Pull]
* [http://ww1.microchip.com/downloads/en/DeviceDoc/70593d.pdf Doc PDF Datasheet DSPIC33FJxxx]
* [http://ww1.microchip.com/downloads/en/DeviceDoc/Explorer%2016%20User%20Guide%2051589a.pdf Doc PDF Carte Explorer 16]
* [https://fr.wikipedia.org/wiki/Transistor_%C3%A0_effet_de_champ_%C3%A0_grille_m%C3%A9tal-oxyde wiki sur les transistors MOSFET]

= Contributor =
* [[User:Philoux]]
* You !!??!!