Modifications

AdaFruit Motor Shield Souder (voir la source)

Version du 6 décembre 2012 à 11:52

2 791 octets ajoutés , 6 décembre 2012 à 11:52

aucun résumé de modification

Ligne 54 : Ligne 54 :

[[Fichier:MOTOR-SHIELD-SOUDER-13.jpg]]

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Flip the board over and solder in the resistor network and switch. You won't need to clip the leads as they are quite short aleady.

[[Fichier:MOTOR-SHIELD-SOUDER-14.jpg]]

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Next are the three integrated circuits (ICs) '''IC1''', '''IC2''' and '''IC3'''. When ICs come from the factory, the legs are angled out somewhat which makes it difficult to insert them into the PCB. Prepare them for soldering by gently bending the legs against a flat tabletop so that they are perfectly straight.

[[Fichier:MOTOR-SHIELD-SOUDER-15.jpg]]

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The latest kits from Adafruit come with 2 16-pin sockets for the L293D motor drivers. They are OPTIONAL and not necessary for operation.

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If you are not experienced with driving motors ( your likelyhood of wiring up a mis-specified motor is high) you should install these so if the L293Ds are destroyed you can easily replace them

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If you are experienced with driving motors, you may want to skip the sockets as the decrease the chips' heat-sinking abilities.

[[Fichier:MOTOR-SHIELD-SOUDER-16.jpg]]

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ICs must be placed in the correct orientation to work properly. To help with placement, each chip has a U notch at the top of the chip. On the circuit board there is a printed out image of the chip outline and one end has a U notch. Make sure the chip notch is on the same end as the image notch. In this PCB, all are facing the same way.

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Gently insert the three chips. Check to make sure none of the legs got bent or broken.

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The 74HC595 goes in the middle, and the two L293Ds go on either side.

[[Fichier:MOTOR-SHIELD-SOUDER-17.jpg]]

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Solder each pin of the chips.

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The four 'middle' pins of the L293D motor driver chips are tied to a large heat sink and thus may end up getting 'bridged' with solder as shown in the second image.

[[Fichier:MOTOR-SHIELD-SOUDER-18.jpg]]

Ligne 68 : Ligne 88 :

[[Fichier:MOTOR-SHIELD-SOUDER-20.jpg]]

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Next are the three 100uF electrolytic capacitors '''C1''', '''C3''' and '''C5'''. Electrolytic capacitors are polarized and must be placed in the correct orientation or they could pop! The long leg of the capacitor is the positive (+) leg and goes into the hole marked with a +. The close-up images shown here indicate with hole is the + one.

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Capacitors are not color-coded. The body color can vary from blue to violet to green to black so''' be sure to read the value on the side, don't depend on the color'''!

[[Fichier:MOTOR-SHIELD-SOUDER-21.jpg]]

Ligne 74 : Ligne 98 :

[[Fichier:MOTOR-SHIELD-SOUDER-23.jpg]]

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After double-checking their polarity, solder and clip the three capacitors

[[Fichier:MOTOR-SHIELD-SOUDER-24.jpg]]

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Place the two 47uF remaining electrolytic capacitors, '''C7''' and '''C8'''

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These are also polarized so make sure the long lead is inserted into the + hole in the silkscreened image.

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Capacitors are not color-coded. The body color can vary from blue to violet to green to black so '''be sure to read the value on the side, don't depend on the color!'''

[[Fichier:MOTOR-SHIELD-SOUDER-25.jpg]]

[[Fichier:MOTOR-SHIELD-SOUDER-26.jpg]]

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Solder and clip the two capacitors

[[Fichier:MOTOR-SHIELD-SOUDER-27.jpg]]

[[Fichier:MOTOR-SHIELD-SOUDER-28.jpg]]

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Next is the 3mm LED used to indicate motor power. LEDs are polarized, just like capacitors, and the long lead is the positive (+) lead.

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Make sure the LED is placed correctly otherwise it wont work!

[[Fichier:MOTOR-SHIELD-SOUDER-29.jpg]]

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AdaFruit Motor Shield Souder (voir la source)

Version du 6 décembre 2012 à 11:52

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