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F7 Lightning Plus Assembly

Keir Fraser edited this page Dec 23, 2021 · 9 revisions

NOTE: If you received a pre-assembled adapter then you can skip straight to Hardware Setup.

Parts List

You should obtain (or have received) the following parts, in addition to the Greaseweazle PCB. Note that kits may include an excess quantity of the "passives" (resistors, capacitors).

Board Reference Footprint Value/Type Quantity
C2-C5,C14 0805 10uF1 5
C9,C11,C13 0805 2.2uF 3
C1,C7,C17,28 0805 1uF 4
C8,C10,C12,C15-C16,C18-C27,C29-C31 0603 100nF 18
C6 0603 10nF 1
R1 0603 49.9k 1
R2 0603 9.53k 1
R3,R9-R11,R14 0603 1k0 5
R4 0603 470R 1
R5-R6,R13,R15 0603 3k0 4
R7-R8,R12 CAY16 10k 3
U1 LQFP144 STM32F730Z8 1
U2 SOT23-6L AP3211KTR-G1 1
U3 SOT23-6L USBLC6-2SC6 1
U4-U5 SOIC-14 74LS07 2
U6 SOT25 AP2112K-3.3TRG1 1
D1 SMAF SS22F, SS26F 1
L1 5mmx5mm 4.7uH 2A 1
12V PRT-00119 PRT-00119 1
ACT 0603 G-Y LED 1
PWR 0603 Red LED 1
DEBUG 7x1 Pin Header 1
RESET, WRITE_INHIBIT 2x1 Pin Header 2
PWR_SLCT 3x1 Pin Header 1
FLOPPY POWER 4x1 TE 171826-4 1
FLOPPY DATA 17x2 Box Header 1
USB USB-B 1
XO1 4-SMD ECS-3225MV-160 1
  1. C5 must be rated 16V or higher

Assembly Guidance

Please note that the small size and pitch of some components, particularly U1, means that you will need some soldering proficiency, and equipment such as the following:

  • A workbench with decent lighting
  • Moderate magnification (eg. a magnifying bench light)
  • Good quality leaded (60/40) solder (eg. Stannol, Kester)
    • Avoid lead-free solder!
  • Plenty of flux
  • Tweezers

Although not a step-by-step guide, I will note some caveats.

  1. The DIY kit comes with the STM32 chip placed in a fold of antistatic material, taped to the PCB. Be warned, the chip will be loose when you peel the tape!

  2. The LED cathode terminal is marked by a green dot under the lens, which should be oriented towards the right-hand side of the PCB.

  3. You may wish to remove pin 5 and/or pin 3 from the FLOPPY DATA header. Some floppy-drive cables use one of these pins as an orientation key.

  4. The 10k resistor arrays are tight on their pads. Be careful that they are correctly aligned.

  5. Jumpers are required at WRITE_INHIBIT (to enable writes) and at PWR_SELECT to select power from USB or external 12V supply.

  6. Be careful not to use too much solder for the external oscillator (XO1). It is easy to flood solder up the side of the can and short the device. In this case the activity LED will flash three times repeatedly, at power on. You will need to try wicking up the excess solder. It may be safer to use hot air to attach XO1.

Assembly Video

With thanks to Martijn Wieland.

Lightning Plus assembly video

IC Orientations