USB Electronic Microscope - Extremely Low - cost Electronic Focusing

This is an electron microscope that uses a stepper motor for focusing, which can improve the lens motion accuracy to 0.001mm. It has a fully 3D printed structural design, public mold hardware, and no expensive CNC.

Main features:

• The whole machine weighs 3.9kg and is not easy to tip over
• Electronic control stroke 20mm accuracy 0.001mm
• Lens (replaceable) 0745 1x eyepiece 0.7-4 continuous zoom objective
• CMOS (replaceable) IMX298 1/2.8 inch 16MP
• Type-C PD 20V input (motor)
• Type-C USB input (camera/lamp)
• Touch stepless dimming LED

All 3D Prints Released Electron Microscope - Extremely Low Cost Electron Focus Edition from user_2934358254 - MakerWorld Printable on all models except A1 mini

The current project has been fully completed.

Let's take a look at the actual use effect (the lens picked up at a low price has problems, and the corners are red) :

1X eyepiece 0.7x objective lens, observation object, a large number of 0402 resistance capacitance PCBA.

1X eyepiece 1x objective lens, observation object 4.2 inch three-color ink screen.

1X eyepiece 1x objective lens, observation object 4.2 inch three-color ink screen.

1X eyepiece 4.5x objective lens (highest magnification) observation object, Xiaomi 5 LCD screen.

PS: You can clearly see the pattern of a capacitive touch layer on the screen, which causes the display effect of Mi 5 to be not very good.

1X eyepiece 4.5x objective lens (highest magnification) observation object, Huaxing Optoelectronics 2712 * 1220 6.67 inch amoled screen.

PS: Typical TCL pearl arrangement

This article only provides software and hardware introduction, specific assembly/printing instructions see Electron Microscope - Very Low Cost Electron Focusing Edition, from user_2934358254 - MakerWorld

1. This project has a total of 3 * PCB hardware, of which the light board/adapter board is on the same PCB. When using it, you need to cut the PCB manually.

2. The adapter board/lamp board has no program and can be used after welding. Please install it according to the assembly process.

3. Welding motor board, among which TMC2209-LA-T is recommended to buy on Taobao for about 2 yuan, except for the 1.3-inch OLED screen, one iron plate burning can complete the welding.

4. Burning code, this project provides source code, using arduino compile, or directly burning HEX files, using serial port burning, power on and hold down the BOOT key, then RST can enter burning mode.

If you need to compile it yourself, please refer to.

5. Power on the 20V PD fast charging head/power supply end, connect the stepper motor, confirm the normal movement of the wire rod, and the electronic part is completed. Please refer to the assembly printing tutorial to complete the subsequent assembly.