PHOTOCELL PROTECTION

PHOTOCELL PROTECTIONPhotoswitch is a widespread element in various automatic systems, protective devices, meters, etc. depending on the tasks the system is triggered by a photocell can be made instantly (for example, the turnstile in the subway), or via a predetermined gap (the Elevator doors). And in some cases rapid changes in illumination is necessary to analyze the situation and prevent deployment if it turns out to be false.

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ANSWER: X = 3!

Durable wide goats good for working with long logs. How to saw Poleshko, if its length is less than the distance between the supports] it’s very simple! Additional pitch — the third leg closer to one side, and problem solved! The dimensions of the pillars additional supports may be shorter than or equal to key; Read more…

SHIRT FOR DRILL

Required, when a small diameter drill bit fails to hold in the Chuck. But “sewing” it is better to “size” smaller: the nail or the drill navathe thinner copper wire — tightly, turn to turn, clockwise. Now, put the resulting spiral shank right drill: when the clamp and working the spiral to wedge and securely Read more…

BRUSH-CHANGELING

Preparing a wooden item to paint, the old paint is removed with wire brushes. However, with thick flakes of old oil paint they can’t cope — there is necessary a metal scraper. So both tools were always there, combine them, attach to the back side of the brush to a steel plate.