As a hobbyist designer with years of experience and a former captain of the regional team sports radiointerview (the hunt for “foxes”) offer a development designed to significantly improve the organization and conduct of training, competition, as well as to facilitate to beginners the way to the fascinating world of radio sport. In essence, this is a homemade compact and reliable transmitter “Fox” (PL). However, it is assembled by an improved wiring diagram, with keying in the power circuit of the crystal oscillator (Fig. 1).
THE DEPTH GAUGE IN A HURRY
Often in the manufacture of the part to measure the depth of the groove or a blind hole and there is no caliper with depth gauge. In this case, but you can use a conventional ruler and the rod of a ballpoint pen. By setting a ruler on the plane parts and attaching the rod, Read more…
In a plastic closure device of the toilet tank over time, visibly worn hole under the axis of the float arm. This violated the density of the locking valve and the water continues to seep into the tank even after filling, resulting in “flooding.”
For works in chemical laboratory hydrogen is produced usually by the reaction of zinc with hydrochloric acid (HCL). Sometimes you need a small amount of gas, and 1 g of zinc makes about 400 ml of hydrogen, so that, using part of it, the rest have to release into the atmosphere.