PCB Tweezers Test Clamp

The ideas were inspired by group friends

For Free, it is designed with a length of 100mm and a width of 3 grids (7.62mm, the same as ordinary tweezers)

If you find it useful, please give it a like and leave (cat style funny)

This sentence is in vain: the tip uses solder pads to achieve full metal wrapping (even the sides are covered with copper)

Update 1: After the test, it failed to pass automatically. Now it has been modified to have no metal coverage on the side and it can pass automatically.

Update 2: During the actual assembly, the original plan was to tap the fixing holes and fix them with M3 screws, which was very troublesome in actual use.

             The file fixing hole diameter has now been changed to 3.05mm, which can be directly inserted into M3 screws for fixation.

Update 3: The copper paving on the front part of the tweezers has been reduced, leaving only the part where the window contacts the components to reduce the error caused by air capacitance.

Use 2 M3 screws and nuts to fix and adjust the spacing. Use
an M2 via hole and solder the wires to use it as a test clamp. It is very convenient to test original components such as chip resistors and capacitors.

! Note: The thickness of the board should not be less than 1mm, otherwise it will be too soft for actual use.

PS: 1.6mm board thickness personally feels too thick. 1mm and 1.2mm board thicknesses are recommended.

        It is recommended that the front end of the tweezers contact the original part be tinned to increase the service life. After all, it is just a layer of copper foil.

Installation effect:

Effect:

Usage diagram:

Accuracy reference:

The capacitor file is left empty at 0.014uF, which may be the "air capacitance" caused by the large copper area. It will be removed later to see if the error can be reduced.

If the diode stall is short-circuited with a 0Ω resistor, the error can be calculated as 0