Error 404--Not Found

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:

10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.

Error 404--Not Found

Error 404--Not Found

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:

10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.

Tools of the Trade

February 2006

IR phototransistors

To provide a miniature surface-mount device for IR detection in sensing applications, TT electronics OPTEK Technology has developed a series of NPN silicon phototransistors in 1206 chip packages. The OP520/OP521 Series surface-mount devices offer response times of 15 s with a peak response to 880 nm wavelength. The OP520 features an opaque lens to shield it from ambient light, while the OP521 lens is clear to offer a wide response range. The series performs at collector-emitter voltages of 30 V, emitter-collector voltage of 5 V, collector current of 20 mA, and power dissipation of 75 mW at 25°C. Operation is rated from -25 to +85°C (-13 to 185°F).
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Error 404--Not Found

Error 404--Not Found

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:

10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.