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| Electronic Projects Design/Ideas/Reviews Are you building an electronic project or want to? Maybe you need some assistance? Come and submit your electronic questions here and let our experienced members find a solution. |
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| | Thread Tools | Display Modes |
16th January 2004, 08:55 PM
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| New Member   |  door ajar monitor Iam building a circuit to monitor door ajar sensor in a 2002 car. I want to use CD4026BE counters that have the seven segment drivers built in. However I am having a hard time getting the counter to count up. All seven segments light up. The door sensor has 12.0V when closed and 0.0V when open. Any suggestions on finding a schematic to make this idea work. |
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16th January 2004, 10:55 PM
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| Experienced Member | post your circuit, you will get a lot of feedback
__________________ see my website: www.geocities.com/russlk |
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19th January 2004, 04:12 AM
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| Experienced Member | All 7 segments light up on your counter? Have you considered that there may be noise present that makes it count up rapidly? Test it on a breadboard first, away from the car, until you get it to work satisfactorly. What are you trying to count? how often the car's doors get opened??? WHY :? |
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20th January 2004, 02:41 AM
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| Experienced Member | Hi, My guess is that the guy wants the 7-segment display to indicate which of the opening parts is not closed properly. Bonnet F.R. door F.L. door R.R. door R.L. door boot/hatch sun-roof Maybe each segment could just refer to one item, with words round the edge ? Such an arrangement would require a minimum of electronics, just the dropper resistors, and the wiring, and the switches or contacts fitted to each opening part. Also if two parts weren't closed, they would show accordingly. I might be quite wrong, maybe he wants numbers for parts not closed properly, but what about two or more not shut ? Dunno, just a suggestion. Regards, John  |
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