HardLabs

F-Stop DarkRoomTimer

c1rk1·F-Stop_DarkRoomTimer·Schematics/F-Stop_DarkRoomTimer.kicad_pcb

F-Stop DarkRoomTimer PCB layout, top view — open source AVR/Arduino board by c1rk1

About the F-Stop DarkRoomTimer PCB

F-Stop DarkRoomTimer is an open source AVR/Arduino PCB design by c1rk1, published on GitHub under the BSD-3-Clause license. It is a 2-layer board measuring 121 × 70 mm, with 29 components from 15 distinct parts.

Its main chip is the Arduino_Pro_Mini, from the AVR/Arduino family. Other key parts include the SA10-21SRWA and 74AHC595. By type, the board carries 10 resistors, 7 capacitors, 6 ICs, 4 connectors, 1 module and 1 buzzer.

From the project

Simple to build, simple to use "F-Stop" DarkRoom Timer with develop timer

F- stop printing was originally made popular by the award winning printer Gene Nocon in 1987.

Menu options: En.-t. : Enlarger timer dE.-t. : Develop timer SEt.t. : Set time F-St. : f-stop set Stri. : Strip Zone : Zone expo

En.-t. : Enlarger timer - set the desired value with the rotary encoder (the steps can be set in "F-St." menu) START/Pause with the "Pedal button". Sound will be played on lamp ON and lamp OFF. Default value after power up 10 sec. (you can change it in "SEt.t." menu).

Main components on the F-Stop DarkRoomTimer

SA10-21SRWA74AHC595Arduino_Pro_Mini

F-Stop DarkRoomTimer bill of materials (BOM)

29 components, 15 distinct parts.

QtyPartRefs
4
SA10-21SRWA
U1, U2, U3, U4
2
74AHC595
U5, U6
1
Arduino_Pro_Mini
A1
1
Start Button
J1
1
Power
J2
1
Rotary Enc.
J3
1
LampRelayBoard
J4
1
Buzzer
BZ1
4
100nF
C1, C2, C6, C7
2
22uF
C3, C4
1
100uF
C5
7
330
R1, R2, R3, R4, R5, R6, R7
1
660
R8
1
5K1
R9
1
100
R10

F-Stop DarkRoomTimer design files

The KiCad project lives in the c1rk1/F-Stop_DarkRoomTimer repository on GitHub; these links point at the commit this page was built from.

F-Stop DarkRoomTimer: common questions

What microcontroller does the F-Stop DarkRoomTimer use?

The F-Stop DarkRoomTimer is built around the Arduino_Pro_Mini, from the AVR/Arduino family.

How big is the F-Stop DarkRoomTimer PCB?

The F-Stop DarkRoomTimer measures 121 × 70 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the F-Stop DarkRoomTimer?

29 components, from 15 distinct parts. The full bill of materials is listed on this page.

Where can I download the F-Stop DarkRoomTimer design files?

From the c1rk1/F-Stop_DarkRoomTimer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the F-Stop DarkRoomTimer design in my own project?

Yes, under the terms of its BSD-3-Clause license, which c1rk1 chose for the repository.

Can I test firmware for the F-Stop DarkRoomTimer 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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