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Varian turbo controller

0xDBFB7·varian-turbo-controller·files/controller/controller.kicad_pcb

Varian turbo controller PCB layout, top view — open source AVR/Arduino board by 0xDBFB7

About the Varian turbo controller PCB

Varian turbo controller is an open source AVR/Arduino PCB design by 0xDBFB7, published on GitHub under the MIT license. It is a 2-layer board measuring 94 × 53.5 mm, with 47 components from 10 distinct parts.

Its main chip is the Arduino_Nano_v3.x, from the AVR/Arduino family. Other key parts include the MIC4604*. By type, the board carries 23 resistors, 14 capacitors, 6 transistors, 3 ICs and 1 module.

It belongs with the power & battery designs in this gallery.

From the project

A shoddy 3-phase controller for Varian V-200 turbomolecular pumps.

This is a small, simple half-bridge circuit that commutates 54 volts into 3-phase at 850 Hz, peak power of about 1 kw for a few minutes, for use with the Varian Turbo-V series of turbomolecular pumps.

There are several other open-source turbomolecular pump controller projects online that are better developed and that might be preferable. In addition, the pumps use a kind of synchronous or induction motor, not a "brushless"-like, so no sensing is needed, only a constant 850 Hz, which is basically just a 3-phase VFD or motor controller. Unfortunately, I wasn't able to find any off-the-shelf…

Varian turbo controller, from the project README
From the project README

Main components on the Varian turbo controller

MIC4604*Arduino_Nano_v3.x

Varian turbo controller bill of materials (BOM)

47 components, 10 distinct parts — part numbers from the project's BOM.

QtyPartRefs
3
MIC4604*
U1, U2, U3
1
Arduino_Nano_v3.x
A1
6
MOSFET-NCH-PSMN7R0
Q1, Q2, Q3, Q4, Q5, Q6
2
CP
C1, C2
9
10uf-1210-25v*
C5, C7, C8, C9, C11, C12, C13, C15 +1
3
0.1uf*
C6, C10, C14
4
24k
R1, R3, R5, R22
10
1k*
R2, R4, R6, R7, R8, R12, R13, R17 +2
6
2.2r*
R9, R10, R14, R15, R19, R20
3
0.005r
R11, R16, R21

Varian turbo controller design files

The KiCad project lives in the 0xDBFB7/varian-turbo-controller repository on GitHub; these links point at the commit this page was built from.

Varian turbo controller: common questions

What microcontroller does the Varian turbo controller use?

The Varian turbo controller is built around the Arduino_Nano_v3.x, from the AVR/Arduino family.

How big is the Varian turbo controller PCB?

The Varian turbo controller measures 94 × 53.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Varian turbo controller?

47 components, from 10 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Varian turbo controller design files?

From the 0xDBFB7/varian-turbo-controller repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Varian turbo controller design in my own project?

Yes, under the terms of its MIT license, which 0xDBFB7 chose for the repository.

Can I test firmware for the Varian turbo controller without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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