Offer to equip standard plug led indicator. Upgraded fork gives you the ability to visually monitor the presence of current in the load. Under these in the diagram the values of the total power of the devices connected to plug-signalling device shall not exceed 500 watts. Well, if the load solid have to replace the placed in the fork diodes on CDA solid state counterparts with higher energy settings.
Anyway to embed the light into a standard plug NF4 not to do without modifying the cover last. Some complicated operations here it is not required. We only need to remove three (of four available) plastic lug-clamp, but instead of remaining there, where buried the emphasis for the contact pins) to drill a hole for the led.
The manufacture of printed circuit boards 1.5 mm foil fiberglass too, as they say, simple. For final finishing her set on the lid plugs, inserted into the appropriate slots of the contact pins and perform a test the Assembly of the plug with operational Troubleshooting identify the parts of inaccuracies. Then, disassembly and final Assembly.
"Firefly" has the standard plug: a - schematic circuit diagram of the device, b - circuit Board with performed installation, in - plug after the upgrade.
Placing properly on the cover printed circuit Board, solder (foil plot with nesting hole) of the first contact pin remaining the details of the scheme. The diodes KDA slightly rasp (top and bottom) to lowering the height of the installation. And the housing 100 Ohm resistor wear segment PVC pipe to be insulated from the second contact pin inserted in charge of the latter and connected to the wire that goes to the load when the help of standard M3 screw with washer. With regard to the second load wire, it is simply soldered to the conductor of the PCB.
Plug the detector is ready for operation. As practice shows, no complaints about his work. Reliability is absolute.
Author: V. Cedars