User Tools

Site Tools


flashing_led_railroad_crossing_lights_with_a_555_timer_chip

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Next revision
Previous revision
flashing_led_railroad_crossing_lights_with_a_555_timer_chip [2017/08/20 01:58]
adam created
flashing_led_railroad_crossing_lights_with_a_555_timer_chip [2017/08/27 14:04] (current)
adam
Line 3: Line 3:
 [[https://​en.wikipedia.org/​wiki/​555_timer_IC|Wikipedia article about the 555 timer IC]] [[https://​en.wikipedia.org/​wiki/​555_timer_IC|Wikipedia article about the 555 timer IC]]
  
-{{:​signetics_ne555n.jpg?​nolink&​200|}} +=== Parts list and cost === 
-{{:​555pinout1.jpg?​nolink&​200|}}+  * 1k Ohm ($0.02 - $0.09)  
 +  * 2.2k Ohm ($0.02 - $0.09) 
 +  * 3.3k Ohm ($0.02 - $0.09) 
 +  * 4.7k Ohm ($0.02 - $0.09) 
 +  * 10k Ohm (3 x $0.02 - $0.09) 
 + 
 +  * 10nF [103] ($0.02 - $0.10) 
 +  * 100uF ($0.05 - $0.15) 
 +  * 1000uF ($0.18 - $0.33) 
 + 
 +  * 555 timer IC ($0.13 - $0.25) 
 + 
 +  * Red LED (2 x $0.03 - $0.14) 
 + 
 +Total cost for one: $2.18 
 + 
 +Cost per unit for 50 bulk: $0.58 
 + 
 +=== 555 Timer IC === 
 + 
 +{{:​signetics_ne555n.jpg?​nolink&​300|}} 
 +{{:​555pinout1.jpg?​nolink&​300|}}
  
 === Modes === === Modes ===
Line 14: Line 35:
 == Astable == == Astable ==
  
-{{:​ne555_astable_waveforms_fr.png?​nolink&​200|}}{{:​275px-555_astable_diagram.svg.png?​nolink&​200|}}+{{:​ne555_astable_waveforms_fr.png?​nolink&​300|}}{{:​275px-555_astable_diagram.svg.png?​nolink&​300|}}
  
 == Monostable == == Monostable ==
  
-{{:​ne555_monotable_waveforms_english_.png?​nolink&​200|}}{{:​275px-555_monostable.svg.png?​nolink&​200|}}+{{:​ne555_monotable_waveforms_english_.png?​nolink&​300|}}{{:​275px-555_monostable.svg.png?​nolink&​300|}} 
 + 
 +{{:​555projectdiagram.png?​direct&​800|}} 
 + 
 +=== Step by step wiring instructions === 
 +  * 555 timer Pin 1: e2  
 +  * 555 timer Pin 1: e22 
 + 
 +  * Yellow jumper: left power bus to right power bus 
 +  * Black jumper: left ground bus to right ground bus 
 + 
 +  * Black jumper: a2 to left ground bus 
 +  * Jumper: a3 to a7 
 +  * 100uF capacitor: c7 and stripe side in c8 
 +  * Black jumper: a8 to left ground bus 
 +  * Jumper: d3 to f1 
 +  * 10k resistor: j1 to j3 
 +  * Jumper: b4 to f13 
 +  * Red jumper: c5 to right power bus 
 +  * Jumper: d5 to h2 
 +  * Jumper: g4 to e7 
 +  * 1k resistor: g2 to g3 
 +  * 4.7k resistor: j8 to j12 
 +  * 2.2k resistor: h14 to h18 
 +  * Black jumper: j18 to right ground bus 
 +  * Red LED: h12 to h13 (cathode; flat side) 
 +  * Red LED: i13 to i14 (cathode; flat side) 
 + 
 +  * Black jumper: Arduino GND to left ground bus 
 +  * Red jumper: Arduino 5V to left power bus 
 + 
 +  * Flasher should be working. 
 + 
 +  * Remove red jumper from Arduino 5V 
 +  * Remove red jumper between left and right power bus 
 + 
 +  * Black jumper: a22 to left ground bus 
 +  * Jumper: d23 to f20 
 +  * 10k resistor: h20 to h22 
 +  * Yellow jumper: j20 to nothing 
 +  * Yellow Jumper: d24 to right power bus 
 +  * Red jumper: a25 to left power bus 
 +  * 10nF capacitor: j25 to j27 
 +  * Black jumper: i27 to right ground bus 
 +  * 1000uF capacitor: h24 and stripe side in h27 
 +  * Jumper: g23 to g24 
 +  * 10k resistor: j22 to j23 
 +  * Red jumper: g22 to left power bus
  
 +{{:​resistor-color-chart.jpg?​direct&​600|}}
flashing_led_railroad_crossing_lights_with_a_555_timer_chip.1503194297.txt.gz · Last modified: 2017/08/20 01:58 by adam