Description

In French: Création d'une carte d'extension pour la carte Explorer (PROJET: Carte Explorer 16 & 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

Schema Feux Tricolores - Kicad
bloc H1 - General - Orcad
bloc H2 - Cross Light part - Orcad

LEDS DISPLAY FIXME

Fixme Display - lettre F - Orcad
Fixme Display - lettre I - Orcad
Fixme Display - lettre X - Orcad
Fixme Display - lettre M - Orcad
Fixme Display - lettre E - Orcad

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 :

$R_{LED_R}=\frac{U_r}{I}=\frac{V_{DD}-U_{LR}}{I}=\frac{3.3V-1.8V}{10mA}$ = 150 Ω

power dispersed by the resistance P_R_LED_R :

$P_{R_{LED_R}}=\frac{R_{LED_R}^2}{I}=\frac{150^{2}}{10mA}$ = 15 mW

calculation of resistance R_LED_O :

$R_{LED_O}=\frac{U_r}{I}=\frac{V_{DD}-U_{LO}}{I}=\frac{3.3V-1.9V}{10mA}$ = 140 Ω

power dispersed by the resistance P_R_LED_O :

$P_{R_{LED_O}}=\frac{R_{LED_O}^2}{I}=\frac{140^{2}}{10mA}$ = 14 mW

calculation of resistance R_LED_G :

$R_{LED_G}=\frac{U_r}{I}=\frac{V_{DD} - U_{LG}}{I}=\frac{3.3V-2.2V}{10mA}$ = 110 Ω

power dispersed by the resistance P_R_LED_G :

$P_{R_{LED_G}}=\frac{R_{LED_G}^2}{I}=\frac{110^{2}}{10mA}$ = 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 :

$VDD_{low} = VDD \cdot 0.2 = 3.3 \cdot 0.2$ = 0.66 V

Resitor seens by the input of uC when it's a low state RIN_low :

$RIN_{low} = \frac{VDD_{low}}{I_L} = \frac{0.66}{2u}$ = 330 kΩ

Resitor Pull-Up MAX :

$R_{Pull-Up_{max}} = \frac{VDD - VDD_{low}}{I_L} = \frac{3.3 - 0.66}{2u}$ = 1.32 MΩ

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

$I_{R_{Pull-Up}} = \frac{VDD - VDD_{low}}{R_{Pull-up}} = \frac{3.3 - 0.66}{10k}$ = 264 uA

power dispersed by the resistance push-pull when the switch is actived

$P_{R_{Pull-Up}} = (VDD - VDD_{low}) \cdot I_{R_{Pull-Up}} = (3.3V - 0.66V)\cdot 262uA$ = 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) :

$R_{1Seg} = \frac{Vcc - U_{seg}}{I_{LED}} = \frac{12V - 10V}{20mA}$ = 100 Ω

Power dissipated by the resistor Rseg:

$P_{R_{1Seg}} = R_{1Seg} \cdot I_{Led}^2 = 100 \cdot (20mA)^2$ = 40 mW

The choice for the resistor(s) value is : 100 Ω 1/4W

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

$R_{1Seg} = \frac{Vcc - U_{seg}}{I_{LED_{Seg1}} + I_{LED_{Seg2}}} = \frac{12V - 10V}{20mA + 20mA}$ = 50 Ω

Power dissipated by the resistor Rseg:

$P_{R_{1Seg}} = R_{1Seg} \cdot (2*I_{Led})^2 = 100 \cdot (40mA)^2$ = 80 mW

The choice for the resistor(s) value is : 51 Ω 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) :

$R_{1LED} = \frac{Vcc - U_{seg_{LED}}}{I_{LED}} = \frac{12V - 2V}{20mA}$ = 500 Ω

Power dissipated by the resistor R_LED:

$P_{R_{1LED}} = R_{1LED} \cdot I_{Led}^2 = 500 \cdot (20mA)^2$ = 200 mW

The choice for the resistor(s) value is : 510 Ω 1/4W

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

$R_{LEDs} = \frac{Vcc - U_{LED}}{I_{LED1} + I_{LED2}} = \frac{12V - 2V}{20mA + 20mA}$ = 250 Ω

Power dissipated by the resistor RLED_2:

$P_{R_{LEDs}} = R_{LEDs} \cdot (2*I_{Led})^2 = 250 \cdot (40mA)^2$ = 400 mW

The choice for the resistor(s) value is : 270 Ω 1/2W

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

$R_{LEDs} = \frac{Vcc - U_{LED}}{I_{LED1} + I_{LED2} + I_{LED3}} = \frac{12V - 2V}{20mA + 20mA +20mA}$ = 167 Ω

Power dissipated by the resistor RLED_3:

$P_{R_{LEDs}} = R_{LEDs} \cdot (3*I_{Led})^2 = 250 \cdot (60mA)^2$ = 601,2 mW

The choice for the resistor(s) value is : 180 Ω 1W

Layout

Extension Explorer 16 - cross fire - PCB Feux Tricolores - Kicad
H1 Cross Light - Layout - Orcad

BOM - Bill of Material

Cross Fire Part

BOM for the Feux Tricolor
Designation	Nb de composants	Fournisseur	Référence	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

BOM for the FIXME Display
Designation	Type de boitier	Nb de composants	Fournisseur	Référence	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

montage en VerroBoard Feux Tricolores

Tests

Test Feux Tricolores -> feux rouges
Test Feux Tricolores -> feux verts

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 the LED Barre -> OPTO IMAGE -> L-132CB ou BA0520HR5A File:LED L-132CB.pdf

required links

Contributor

User:Philoux
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Extension Explorer 16

Contents

Description

Digram - Schematic

Cross Light Part

LEDS DISPLAY FIXME

Part Calculation of Electronics Digram

LED's for crossroad

Formula

Switch for crossroad

Formula

LEDS For DSIPLAY FIXME

Details arround the LED Segment

Datas

Calculation

Resistor in end line for vertical sgement

Resistor in end line for horizontal sgement

Layout

BOM - Bill of Material

Cross Fire Part

LED DISPLAY FIXME

Assembly

Tests

Modification

Documentation

PDF FILE

required links

Contributor

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