Home page of fstoptimer - www.Geocities.ws

Here are some of the specifications for this timer that is yet to be built.

Power Source : AA's or 5 - 12 Volts DC plug pack (solves those pesky CE C-tick, FCC Part 15 Electrical regulations)

Always counts up from 0 to 64 seconds.
On activation beep 3 times flash led 3 times then start counting up
At 0 seconds trigger 12Volts/Relay switch ( user implemented after purchase) Switched Terminal Block. Beep at each major f stop , e.g. 4 seconds 8s, 16 s 32s 64s.
Provison to beep also at 1/3 stops between 8 seconds to 64 seconds.
e.g. count up to 8 seconds and beep at each 1/3 stop.
ability to set range for beeps. - helps with making test strips.
at end of counting period trigger 1 long beep and simultaneously trigger the relay to switch the enlarger off. (user to implement)

Functionality enhancements:

Footswitch Function : Olleorama - 17th Nov 2010

The target price should be around $39.00.

1) Make up finished items - small run of 20 units for initial evaluation

2) Offer schematics and board layout free to anyone

3) Write up the software to control the timer- offer binary code to anyone.

4) Allow other developers to write code for unit for customisation

5) Get a repository going for those who want to offer modified code based on the board layout. Freeware GNU style.



	F Stop Timer - The Darkroom timer built by a keen photographer for the keen photographer on a budget.
	Here are some of the specifications for this timer that is yet to be built.

	Here are some of the specifications for this timer that is yet to be built. Power Source : AA's or 5 - 12 Volts DC plug pack (solves those pesky CE C-tick, FCC Part 15 Electrical regulations) Always counts up from 0 to 64 seconds. On activation beep 3 times flash led 3 times then start counting up At 0 seconds trigger 12Volts/Relay switch ( user implemented after purchase) Switched Terminal Block. Beep at each major f stop , e.g. 4 seconds 8s, 16 s 32s 64s. Provison to beep also at 1/3 stops between 8 seconds to 64 seconds. e.g. count up to 8 seconds and beep at each 1/3 stop. ability to set range for beeps. - helps with making test strips. at end of counting period trigger 1 long beep and simultaneously trigger the relay to switch the enlarger off. (user to implement) Functionality enhancements: Footswitch Function : Olleorama - 17th Nov 2010 The target price should be around $39.00. 1) Make up finished items - small run of 20 units for initial evaluation 2) Offer schematics and board layout free to anyone 3) Write up the software to control the timer- offer binary code to anyone. 4) Allow other developers to write code for unit for customisation 5) Get a repository going for those who want to offer modified code based on the board layout. Freeware GNU style.
	Version one of F Stop Timer Interface. - Feedback to APUG Link Forum please. Thanks A fellow photographer suggested a round clock face would be better. http://www.apug.org/forums/forum43/74842-diy-enlarger-timer-circuit-3.html