With the magazine “modelist-Konstruktor” sign not the first year. Mainly as a diligent reader and a little less like a homebrew, trying in conditions of simple home workshop to put into practice some of the promoted ideas and solutions. Now offer one of their own developments. Its essence is in the equipment standard plug led indicator. Upgraded fork gives you the ability to visually monitor a current flow in the load. When specified in the schema the values of the total capacity of devices connected to the plug-signalling device shall not exceed 500 watts. Well, if the load is solid, will have to replace the placed in the fork diodes КД208А to the semiconductor counterparts with higher energy parameters.
In any case, for embedding a light-coindicator standard plug NF4 can not do without changes in cap last. Any complicated operations are necessary. It is only necessary to remove three (of four available) plastic ledge of the retainer and in front of the rest (where was located the recessed stop for the contact pin) drill a hole for the led.