| 摘要 |
<p>The device is designated to switching of stairway lightning, it can be also used for switching other electric circuits. Reversible timing relay consists of a jack (1) connected with output contact of a switch (PR1), cathode of a diode (D2), anode of a diode (D3), the cathode of which is connected to a cathode of diode (D4), positive pin of a condenser (C6), pin of switch contacts of a relay (RE1) and a coil of a relay (RE2), which is connected by the second pin with collector of a transistor (T1), the base of which is connected to a condenser (C3), resistor (R3) and a potentiometer (P1), the second pin and a follower pin are connected to a positive pin of a condenser (C5), resistor (R4), the second pin of which is connected to the second pin of switch contacts of the relay (RE1), whereby negative pin of a condenser (C5) is connected with a negative pin of condenser (C6), with anodes of the diodes (D2,D4), the second pin of resistor (R3), a condenser (C3), emitter of transistor (T) and a condenser (C2). The second pin of condenser (C2) is connected with the second output contact of a switch (PR1), jack (4) and switch contact of the relay (RE2), the stapled contact of which is connected to a jack (3) and the second output contact to a jack (5), whereby change contact of a switch (PR1) is connected to the anode of diode (D1), the cathode of which is connected to a positive pin of a condenser (C4) and a coil of the relay (RE1), the second pin of which is connected to a negative pin of a condenser (C4) through a resistor (R2) and a parallel connection of a resistor (R) and a condenser (C1) to a jack (2).</p> |
