© Copyright © January 28th 1996 - 2009 ..... Brought to you by Unitech Electronics Pty. Ltd.

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              A Variety OF simple NE-555 timing circuits to " tinker " WITH.
              These are kept deliberately simple and yet functional.


 
   Please note, the NE-555 chip chosen for these experiments is in fact Made by the original company, 
   Signetics on the 25th week of 1977 . This chip is (as of today september 23rd 2009) 32 years old. 
   Not bad for a 32 year old chip fabrication technology and  manufacturing and still working today.
4 NE555 CONFIGS.gif

NE-555 Front Breadboard Pic 


                        Click on the NE-555 chip and watch the circuit above come to life !
NE-55-VIDEO 

                        Click on the NE-555 chip and watch the circuit above come to life !

NE-555 Rear Breadboard Pic

NE-555 8 Min Timer CCT Pic

NE-555 2 minute timer

NE-555 12 minute timer

NE-555 5 minute 50 timer

NE-555 TIMED PLOTTED

NE555 Data 

 
         As the voltage ( in this case about 6.07 Volts ) reaches 2/3 of supply input to pin 8, ( 9.00V ) the NE-555 resets and pins 6 and 7 reverts 
         back to zero Volts ( well, almost ) about 0.21 volts was measured. Using C1a 100uF + C1b 220uF = 320uF + VR1 1Meg Ohm + R1 12K ohms.
         C1(a) = 100uF +C1(b) = 220uF (totalling 320uF) with VR1=1 Meg Ohm + R1=12K ohms, Reset time = 7 minutes and 8 seconds. Supply = 9.00 volts DC.
         Noted readings for straight C1 = 220uF with VR1 = 1 Meg Ohm + R1 = 12K ohms ( 1,012,000 ohms ) = 5 minutes and 50 seconds. Supply = 9.00 volts DC.






                        Click on the NE-555 chip and watch the circuit above come to life !


NE-55-VIDEO


                        Click on the NE-555 chip and watch the circuit above come to life !






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Layout is Copyright  © 1996 Unitech Electronics Pty. Ltd.  ALL RIGHTS RESERVED.

Last updated: January 28th 1996
Added PDF access references: September 21st 2009
Added 3 NE-555 pictures: September 23rd 2009