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15CommentsJoined August 17th, 2009

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  • DIY 2G/3G/4G wireless cell phone signal booster

    sry mr lau this project has no technical fundamentals, you didnt consider:losses on coax and the benefict of the coax shield,the wavelenght, or the sizes of the quad antenna,the initial and final coils value related to working frequency,the Zo and the proper insulated conectors for the working frequency.may be this is working at your home with a strong signal outside,but is pure chance in most cases.if you could give us the source of information you got , or the calculation you didbefore trying and error test, all we could appreciate it very much

    sry mr lau this project has no technical fundamentals, you didnt consider:losses on coax and the benefict of the coax shield,the wavelenght, the sizes of the frame antenna,the initial and final coils value related to working frequency,the Zo and the proper insulated conectors for the working frequency.may be this is working at your home with a strong signal outside,but is pure chance in most cases.if you could give us the source of information you got , or the calculation you did before trying and error test, all we appreciate it very much

    sorry mr lau this project has no technical fundamentals, you didnt consider:losses on coax and the benefict of the coax shield,the wavelenght, or the sizes of the quad antenna,the initial and final coils value related to working frequency,the Zo and the proper insulated conectors for the working frequency.may be this is working at your home with a strong signal outside,but is pure chance in most cases.if you could give us the source of information you got , or the calculation you didbefore trying and error test, all we could appreciate it very much and improve it

    sry mr lau this project has no technical fundamentals, you didnt consider: losses on coax and the benefict of the coax shield,the wavelenght, the sizes of the frame antenna,the initial nad final coils value related to working frequency,the Zo and the proper insulated conectors for the working frequency.may be this is working at your home with a strong signal outside,but is pure chance in most cases.if you could give us the source of information you get , or the calculation you did before trying and error test , i appreciate it very much

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  • Moodbox, stay connected despite the distance

    excellent improved idea !!!! my respect to you !!

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  • Capacative Soil Moisture Sensor (self-made)

    could you publish de diagram?

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  • Measuring Water Height Using a Particle Photon, a Parking Sensor and IFTTT.com

    it measure the deep inside water or the distance over the water?

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  • horus_m commented on souhadl's instructable Motion Detection Lights 6 months ago
    Motion Detection Lights

    i dont see any contribution from JodyF1. what is the intention of his comment. only negativeness??

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  • horus_m completed the lesson Class Overview in the class 3D Printing Class7 months ago
  • horus_m commented on Samartist's instructable Sunshine Alarm using LM555 and LM3581 year ago
    Sunshine Alarm using LM555 and LM358

    in fact, what you do, is recicle, and devevopment, twice effort and twice success. 10!!

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  • horus_m commented on Samartist's instructable Sunshine Alarm using LM555 and LM3581 year ago
    Sunshine Alarm using LM555 and LM358

    very good idea, why not trying with 2 LM556, the first as comparator, reducing to 2 IC only. tks you

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