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OpenFlops-W1D

silvervest·OpenFlops-W1D

OpenFlops-W1D PCB layout, top view — open source STM32 board by silvervest
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About the OpenFlops-W1D PCB

OpenFlops-W1D is an open source STM32 PCB design by silvervest, published on GitHub under the Custom license license. It is a 2-layer board measuring 95 × 116 mm, with 49 components from 22 distinct parts.

Its main chip is the STM32F105RBT6, from the STM32 family. Other key parts include the SN74LVC07A and LM1117-3.3. By type, the board carries 19 resistors, 15 capacitors, 5 connectors, 3 ICs, 3 switches and 1 transistor.

It belongs with the displays & leds designs in this gallery.

From the project

Modified OpenFlops specifically to replace Citizen W1D drives

OpenFlops W1D is a complete modification for the original OpenFlops specifically configured for use replacing the flaky Citizen W1D floppy drives, popularly used in Compaq LTE Elite laptops.

For a lot more detail, installation and usage guides, visit https://silvestron.com/openflops-w1d/

While this design is specifically made for the W1D when used in an LTE Elite laptop, it definitely can be used with any other floppy drive that uses the 26-pin FPC connector, it just may not fit in the same space. Heed caution.

OpenFlops-W1D, from the project README
From the project README

Main components on the OpenFlops-W1D

SN74LVC07ASTM32F105RBT6LM1117-3.3

OpenFlops-W1D bill of materials (BOM)

49 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SN74LVC07A
U1
1
STM32F105RBT6
U2
1
LM1117-3.3
U3
1
2N7002
Q1
1
C115962
8 MHz
Y1
1
C19188849
FDD
J1
1
C2763369
USB_A_FEMALE
J2
1
PROG_PORT
J3
1
OLED
J4
1
MICRO_SD_CARD_DET1
Micro_SD_Card_Det1
J7
1
C391035
Speaker
SPK1
1
BT_RIGHT
SW1
1
C125034
BT_LEFT
SW2
1
C22435662
REDWC/DSKCHG
SW3
1
C2297
LED_GREEN
LD2
2
10U
10u
C1, C4
9
100N
100n
C2, C6, C7, C8, C9, C10, C11, C18 +1
2
20P
20p
C3, C5
2
10u
C17, C19
2
22
R1, R2
Show 2 more
QtyPartRefs
2
10K
10k
R3, R13
15
1k
R4, R14, R15, R16, R17, R18, R19, R21 +7

OpenFlops-W1D design files

The KiCad project lives in the silvervest/OpenFlops-W1D repository on GitHub; these links point at the commit this page was built from.

OpenFlops-W1D: common questions

What microcontroller does the OpenFlops-W1D use?

The OpenFlops-W1D is built around the STM32F105RBT6, from the STM32 family.

How big is the OpenFlops-W1D PCB?

The OpenFlops-W1D measures 95 × 116 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OpenFlops-W1D?

49 components, from 22 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 OpenFlops-W1D design files?

From the silvervest/OpenFlops-W1D repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the OpenFlops-W1D design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the OpenFlops-W1D without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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