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2015-11-26 Electrical Engineering - Adding Digital clock display in Remote controls.:

This feature has been on some remote controls for various electronic products in times past with little perceived benefit to the users.    The added cost and to some users added confusion to the operation

2015-11-25 Entomology (Study of Bugs) - Bug Identification Follow up:

The picture does show show the clothes moth (Genus Tineola) The adult in th photo is probably  laying eggs. The caterpillar does the damage. Follow your original plan    Donations are not necessary but

2015-11-25 Entomology (Study of Bugs) - Bug Identification Follow up:

The first thing you must do is be sure these are clothes moths. I rarely get questions about clothes moth because  they only feed on organig materials anf most clothes todat are artificial. There is a

2015-11-25 Algebra - maths - exponential equation:

------------------------------------------------------------------------------------  2^(x+4) - x^(x+2)=3?    First note that x must be small, for large numbers don't have powers very close together.

2015-11-25 Electronics - NPN VS PNP replacment:

Yes, it is possible; at least theoretically.    If you assume a one transistor circuit biased for class A operation and the operating characteristics (beta, biasing voltages, etc.) are similar in each


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