GMU:Devices of Perception/Francis and Paul: Difference between revisions

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ASTABLE 555 - PHOTODIODE as a SWITCH

~~For~~ the second assignment we ~~decided~~ to ~~built~~ a ~~kind of~~ vehicle. ~~One that should~~ be ~~able to move forwards, backwards~~ and ~~sidewards~~.

After having learnt about the IC 741 aka the comparator circuit, it was our goal to utilize this in our second assignment. The other parts we were able to scavenge across the classroom. Two motors attached to the breadboard transformed our circuit into a little vehicle.

~~Therefore~~ we ~~came up with~~ the ~~idea to use two~~ motors ~~with plastic wheels as our main device~~. ~~The first model was~~ able to ~~move forwards and backwards depending on a photodiode and its changing resistance again depending light~~.

The comparator circuit was controlled through a photo resistor. Depending on the amount of light hitting the photo resistor the state would be either high or low. A relay set up as an H-Bridge would transfer high and low two forward or backward movement of the motors.

Originally we wanted to mirror this circuit on the breadboard so both motors could be controlled independently. Unfortunately we were missing a second Transistor (TIP-127) to be able to finalize our plans that weekend.

~~To improve:~~

Although not being able to complete our second assignment to the extend we had originally imagined, we somehow had the feeling our vehicle was developing it's own character in a way.

~~Apply a~~ second ~~photodiode~~ to the ~~breadboard so that~~ it ~~is possible~~ to ~~steer both~~ of the ~~wheels independent from each other~~.

e.g. it could be programmed to be shy of the dark, and stop driving when it leaves a well lit space.

The jerkyness it had when changing directions, or it staying upright through it's low center of gravity somehow added to this impression.

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[[File:Ass2_2.jpg|200px]]

[[File:Ass2_1.jpg|200px]]<br>

~~Parts~~:

COMPONENTS:

1x

Double Pole Double Throw - Relay |

@@ Line 76: / Line 76: @@
 ASTABLE 555 - PHOTODIODE as a SWITCH
-For the second assignment we decided to built a kind of vehicle. One that should be able to move forwards, backwards and sidewards.
+After having learnt about the IC 741 aka the comparator circuit, it was our goal to utilize this in our second assignment. The other parts we were able to scavenge across the classroom. Two motors attached to the breadboard transformed our circuit into a little vehicle.
-Therefore we came up with the idea to use two motors with plastic wheels as our main device. The first model was able to move forwards and backwards depending on a photodiode and its changing resistance again depending light.
+The comparator circuit was controlled through a photo resistor. Depending on the amount of light hitting the photo resistor the state would be either high or low. A relay set up as an H-Bridge would transfer high and low two forward or backward movement of the motors.
+Originally we wanted to mirror this circuit on the breadboard so both motors could be controlled independently. Unfortunately we were missing a second  Transistor (TIP-127) to be able to finalize our plans that weekend.
-To improve:
+Although not being able to complete our second assignment to the extend we had originally imagined, we somehow had the feeling our vehicle was developing it's own character in a way.
-Apply a second photodiode to the breadboard so that it is possible to steer both of the wheels independent from each other.
+e.g. it could be programmed to be shy of the dark, and stop driving when it leaves a well lit space.
+The jerkyness it had when changing directions, or it staying upright through it's low center of gravity somehow added to this impression.
@@ Line 87: / Line 87: @@
 [[File:Ass2_2.jpg|200px]]
 [[File:Ass2_1.jpg|200px]]<br>
-Parts:
+COMPONENTS:
 x
 Double Pole Double Throw - Relay |