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traffic light (pedestrians/cars):

small simulation of traffic light (pedestrians/cars) where the different phases of the traffic light would be emulated kind of realisticly.
Meant that if push-button is pressed, the car traffic light will have a short "yellow" and e.g if car traffic light got "red" there will be a delay until pedestrians get "green" ...

that's how it looks like (in doubt, please download original AVI from top right ~34MB):


item-list:

  • Arduino UNO
  • 2x red, 1x yellow und 2x green LEDs
  • 5x 220 Ω resistors
  • 1x 10k Ω resistor
  • 1x push-button
  • ... and a few cables

circuit-schema:

[ Verkehrsampel_Steckplatine_klein.jpg ]

sourcecode:


Quellcode ampel.ino

7-segment-display x2:

Two 7-segment displays are driven by 2x 74HC_HCT4094 Shift Register ICs.
This results in using only 3 I/O-ports from Arduino.
In this sample code it will be continously counted from 0-99 and backwards.

that's how it looks like (in doubt, please download original AVI from top right ~34MB):


item-list:

  • Arduino UNO
  • 2x 7-segment displays
  • 2x 74HC_HCT4094 shift register
  • 4x 330 Ω resistors
  • ... and a lot of cables

circuit-schema:

[ 7_Segement_x2_Steckplatine_klein.jpg ]

sourcecode:


sourcecode Sieben_Segment_x2.ino

greetings via LCD-Display:

shows a colorful message onto a mini TFT display.
The "screensaver", that can be deactivated by pressing the button, is a picture of Bender (bendx.bmp), which is stored on a SD-card (on the backsite of TFT).

The TFT modul ST7735R is a 132 x 162 pixel 262K colour display with Serial Peripheral Interface (SPI) and access (via SPI as well) and slot for mini SD-card.
The mandatory library ST7735 + examples and picture (bendx.bmp) can be found in download section.

that's how it looks like (in doubt, please download original AVI from top right ~48MB):


item-list:

  • Arduino UNO
  • 1x ST7735R (color single-chip TFT + mini SD-slot)
  • 1x mini SD-card
  • 1x 10k Ω resistor
  • 1x push-button
  • ... and a few cables

sourcecode:


sourcecode gruesse.ino

temperature + 7-segment-display x4:

shows the current temperature measured by TMP36 Sensor on a 7-sement x4 unit.
The temperature range is: -9.9℃ − 99.9℃
(for Ireland a range of -5.0℃ − 18.0℃ would be more than enough! ☺).

that's how it looks like (in doubt, please download original AVI from top right ~37MB):


item-list:

  • Arduino UNO
  • 1x TDCR1050m (7-segment x4)
  • 2x 74HC_HCT4094 shift register
  • 1x TMP36 Sensor
  • 10x 330 Ω resistors
  • ... and a lot of cables

circuit-schema:

[ temperatur_Steckplatine_klein.jpg ]

sourcecode:


sourcecode temperatur2.ino

download:

traffic light

7-segment-display x2

greetings via LCD-Display

temperature + 7-segment-display x4

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