Soldering Iron Ground Adapter

Soldering Iron Ground Adapter

This ground adapter allows you to remove power to the DUT instead of unplugging it, then having to connect the DUT to line ground every time you need to work on the circuit.

The KLARYTYMA and similar soldering irons have very low resistance from the tip to line ground. Sparks will fly if you happen to touch the AC line with power on.

This ground adapter provides protection by limiting the current to 1 mA. This is well below the 5 mA required to trip the GFCI, and protects against ESD when the power is off.

An ordinary light switch allows you to turn power off to the DUT, and the circuit remains grounded for ESD protection. The 120k resistor between tip and ground prevents tripping the GFCI when power to the DUT is switched off.

A standard dual outlet provides power to the iron and the DUT.

A fuse in series with the AC line could be added to provide protection in the event the DUT becomes shorted through a miswire or solder bridge.

Please check line wrap.

Version 4 SHEET 1 1204 728 WIRE 288 -48 192 -48 WIRE 368 -48 288 -48 WIRE 400 -48 368 -48 WIRE 480 -48 416 -80 WIRE 592 -48 480 -48 WIRE 624 -48 592 -48 WIRE 192 -32 192 -48 WIRE 368 0 368 -48 WIRE 576 0 368 0 WIRE 192 64 192 48 WIRE 304 64 192 64 WIRE 624 64 304 64 WIRE 304 128 192 128 WIRE 400 128 304 128 WIRE 576 128 480 128 WIRE 192 144 192 128 FLAG 288 -48 Line FLAG 304 64 Neutral FLAG 192 144 0 FLAG 304 128 Ground FLAG 592 -48 DUT FLAG 592 0 Iron FLAG 592 128 Tip SYMBOL voltage 192 -48 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 3 -31 -16 Left 2 SYMATTR Value 120V AC SYMATTR InstName V1 SYMBOL res 384 144 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 120k 1/4W TEXT 304 -136 Left 2 ;'Soldering Iron Ground Adapter TEXT 400 -48 Left 2 ;O TEXT 480 -48 Left 2 ;O TEXT 160 192 Left 2 ;This ground adapter allows you to remove power to the DUT instead of unplugging it, TEXT 160 216 Left 2 ;then having to connect the DUT to line ground every time you need to work on the TEXT 160 240 Left 2 ;circuit. TEXT 160 280 Left 2 ;The KLARYTYMA and similar soldering irons have very low resistance from the tip TEXT 160 304 Left 2 ;to line ground. Sparks will fly if you happen to touch the AC line with power on. TEXT 160 336 Left 2 ;This ground adapter provides protection by limiting the current to 1 mA. This is well TEXT 160 360 Left 2 ;below the 5 mA required to trip the GFCI, and protects against ESD when the power is off. TEXT 160 400 Left 2 ;An ordinary light switch allows you to turn power off to the DUT, and the circuit remains TEXT 160 424 Left 2 ;grounded for ESD protection. The 120k resistor between tip and ground prevents TEXT 160 448 Left 2 ;tripping the GFCI when power to the DUT is switched off. TEXT 160 528 Left 2 ;A fuse in series with the AC line could be added to provide protection in the event the TEXT 160 552 Left 2 ;DUT becomes shorted through a miswire or solder bridge. TEXT 160 488 Left 2 ;A standard dual outlet provides power to the iron and the DUT.