Klicky 3D printer magnetic probe

Reference project addresses: https://euclidprobe.github.io/cheap
 
 
magnets 6x3 with 3mm countersunk holes (N25) (not recommended, you might find 3.6mm inner holes)
https://item.taobao.com/item.htm?_u=m2jk0vj06b22&id=677223530485&spm=a1z09.2.0.0.76042e8dFux8uT
better magnets 6x3 with 2mm countersunk holes (N35)
https://item.taobao.com/item.htm?_u=c2jk0vj07530&id=564130787836&spm=a1z09.2.0.0.2b762e8dpNwhr6
stronger magnets 6x3 with 2mm countersunk holes (N52)
https://item.taobao.com/item.htm?app=chrome&bxsign=scdI4jZwgweQJxe7DKUhjPhlSGEgq80cXj_ry7_K4EmcqG7KSOfez4wRH6t5lfJz4jHQqNMzqastVM0M--OIteZFcqz7IZYnzUR0yj0jJ_dDRtfPkHlMJReSCXTXvpleI jB&cpp=1&id=692502462669&price=0.45-205&shareUniqueId=26392620501&share_crt_v=1&shareurl=t rue&short_name=h.gbXn1d0qaovUOWg&skuId=5275772107137&sourceType=item,item&sp_tk=TW9aRFdJdk ZtQVc=&spm=a2159r.13376460.0.0&suid=2789ab31-2122-4e9b-bb3c-04a9956f3d8b&tbSocialPopKey=sh areItem&tk=MoZDWIvFmAW&un=09603feadf49d3dcb2f10b56166a698d&un_site=0&ut_sk=1.YvxmZCNpDp0DA I6w6OL4SdMC_21646297_1713960094240.Copy.1https://item.taobao.com/item.htm?id=745674021802&skuId=5465764879434&spm=a1z0d.6639537/tb.1997196601.270.296774841W2NCW
Recommended by a pro: supposedly high-precision 6x3 hole 2mm magnet. Countersunk (N52)
https://item.taobao.com/item.htm?id=745674021802&skuId=5465764879434&spm=a1z0d.6639537/tb.1997196601.270.296774841W2NCW
Small head screw M2X4 3mm head (not suitable for cheap magnets)
https://detail.tmall.com/item.htm?_u=c2jk0vj0c3d0&id=717467816792&spm=a1z09.2.0.0.2b762e8dpNwhr6
Countersunk head screw M2x4 3.5mm head (suitable for cheap magnets) (If your magnet has a 3.6mm inner hole, this screw will not work)
https://detail.tmall.com/item.htm?abbucket=18&id=640310583202&rn=f9d09ca2fc4d245e32db9cb892f4f1bb&skuId=5518857014336&spm=a1z10.3-b.w4011-22615119255.94.1239f5e5sapn93
TTC micro switches
: https://item.taobao.com/item.htm?_u=c2jk0vj0710f&id=705433676474&skuId=5270176938209&spm=a1z09.2.0.0.2b762e8dpNwhr6
Omron micro switches
: https://item.taobao.com/item.htm?id=574796579888&spm=a1z0d.6639537/tb2.1997196601.183.483e7484YZPJ9s
SMTSO-M2-0.5ET surface mount nuts for version 6.3 The link provided
(https://item.taobao.com/item.htm?spm=a1z0d.6639537/tb2.1997196601.3.bc637484UYbuhc&id=636483838062
 
) lists 0603 surface mount resistors. (For 5V standard brightness, choose 0.51K; for 5V high brightness, choose 0.33K; for 24V high brightness, choose 2.4K; for 24V standard brightness, choose 4.7K).
The LEDs used are 0805 surface mount LEDs. A soldering station is available to mount 1206 LEDs. The dual-color white LED uses 1206 (brighter!).
A dual-color version has been added (one LED is always on, and the other is mounted on the lower PCB and lights up, turning off when triggered).
Because of feedback regarding mounting hole placement errors, version V5.4 changed the mounting holes to oblong holes.
A good design was seen on Douyin, so version V5.5 changed the connector pads to XH2.54/PH2.0 universal pads (two pads stacked together).
 
A new version 6.2 with a step-down circuit has been added. This product
uses an SOT23 packaged LDO voltage regulator chip,
with a jumper added to switch between always-on and triggered LED operation.
A Schottky diode is added for protection (this may cause MCUs with an I/O voltage of 3.3V to malfunction).
For PCB testing
of the voltage regulator chip, please refer to: https://item.taobao.com/item.htm?_u=i2jk0vj0854b&id=643357241091&spm=a1z09.2.0.0.6e582e8dCA7CCG.
 
Version 6.3 removed the never-used Zener transistor
thread and uses a surface-mount nut.
 
Version V7.xx
added a version without the "soul" (LED), making it simpler to build.
 
Please indicate the open-source address or the group number below when selling
. After all, I only created this to increase the number of group members.
 
Group: 701827620