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2008-06-07 by Howard
Hi all I need a timer for my uv light box that i have just made this week range from about 0 to 10 mins would do the trick. Anyone got any diagrams and pcb layouts (single side) for making one ? something like, counts down then switchs off and sounds a buzzer ?? Thanks in advance Howard
2008-06-07 by Leon
----- Original Message -----
From: "Howard" <hj.payne@...> To: <Homebrew_PCBs@yahoogroups.com> Sent: Saturday, June 07, 2008 3:21 PM Subject: [Homebrew_PCBs] HELP: UV Light box > Hi all > I need a timer for my uv light box that i have just made this week > range from about 0 to 10 mins would do the trick. > > Anyone got any diagrams and pcb layouts (single side) for making one ? > > something like, counts down then switchs off and sounds a buzzer ?? I just use a timer program for my Palm PDA. I occasionally forget to start it when I switch the unit on, or don't notice the alarm, though. Leon -- Leon Heller Amateur radio call-sign G1HSM Yaesu FT-817ND transceiver Suzuki SV1000S motorcycle leon355@... http://www.geocities.com/leon_heller
2008-06-07 by Howard
--- In Homebrew_PCBs@yahoogroups.com, "Leon" <leon355@...> wrote: > > ----- Original Message ----- > From: "Howard" <hj.payne@...> > To: <Homebrew_PCBs@yahoogroups.com> > Sent: Saturday, June 07, 2008 3:21 PM > Subject: [Homebrew_PCBs] HELP: UV Light box > > > > Hi all > > I need a timer for my uv light box that i have just made this week > > range from about 0 to 10 mins would do the trick. > > > > Anyone got any diagrams and pcb layouts (single side) for making one ? > > > > something like, counts down then switchs off and sounds a buzzer ?? > > I just use a timer program for my Palm PDA. I occasionally forget to start > it when I switch the unit on, or don't notice the alarm, though. > > Leon > -- > Leon Heller > Amateur radio call-sign G1HSM > Yaesu FT-817ND transceiver > Suzuki SV1000S motorcycle > leon355@... > http://www.geocities.com/leon_heller > Hi Thats why i would want it to have a shut off relay just looking around the net at the mo! Howard
2008-06-07 by John Coppens
On Sat, 07 Jun 2008 14:21:18 -0000 "Howard" <hj.payne@...> wrote: > I need a timer for my uv light box that i have just made this week > range from about 0 to 10 mins would do the trick. UV exposure not being too critical, maybe the easiest thing would be to look around for some cheap mechanical timer like those used in small ovens, egg-timers, toasters, etc. After all, you're not interested in sub-second precision here, are you? John
2008-06-07 by René Eskesen
Hi I'm making one, the range is from 1 sec to 99m99s there is a LCD, 3 buttons start/stop, min and sec + buzzer. It will be finished in the next comming week. regard rene Denmark 2008/6/7 Howard <hj.payne@...>: > Hi all > I need a timer for my uv light box that i have just made this week > range from about 0 to 10 mins would do the trick. > > Anyone got any diagrams and pcb layouts (single side) for making one ? > > something like, counts down then switchs off and sounds a buzzer ?? > > Thanks in advance > > Howard > > > [Non-text portions of this message have been removed]
2008-06-07 by warrenbrayshaw
How about an electronic digital timer. The kind you plug into a wall outlet having programmed it to turn on , say a table lamp, to convince the burglars someone is at home. These can be programmed in 1 minute increments. Simple,low cost and readily available. Could be programmed to do a 10 minute warm up for the fluoro tubes, then off for a minute to place the PCB then on for the desired exposure. It would turn off by itself so you could walk away and have 24 hrs or a week to return before the cycle repeated if it did not have the one time event option. May be inconvenient for doing many exposures unless it has the settable countdown feature,as mine does. I can set it for, say, 3 minutes and it will only provide power to the lamps for 3 minutes. Additionally it has other uses around the home when needed. Here's mine, available in New Zealand/Australia http://www.kambrook.com.au/product.asp?id=50 Regards Warren "Howard"wrote:
> > I need a timer for my uv light box that i have just made this week > range from about 0 to 10 mins would do the trick. > > Anyone got any diagrams and pcb layouts (single side) for making one ? > > something like, counts down then switchs off and sounds a buzzer ??
2008-06-07 by Matthew Smith
Quoth Howard at 2008-06-07 23:51... > Hi all > I need a timer for my uv light box that i have just made this week > range from about 0 to 10 mins would do the trick. > > Anyone got any diagrams and pcb layouts (single side) for making one ? > > something like, counts down then switchs off and sounds a buzzer ?? Mine does more than that - when it finishes, the display says "Enjoy Your Meal!". It is, as you may have guessed, the control panel from a microwave oven. I always found dead (supposedly - I managed to resurrect a good few) microwaves easy to scrounge from the local repair shop. Most people would rather buy a new unit than pay $200 to replace a $5 light bulb... There are a couple of microswitches (door interlocks) that plug into the main board that need to be accounted for - the pins may need to be shorted out as these are safety devices to stop the thing from operating. Once that's figured out, the magnetron relay is used to control the tubes (or whatever you are using). Were I designing something from scratch, I'd probably use three BCD switches to set the time (measure in seconds - easier than minutes/seconds) and 7-segment LED displays or Nixie tubes. You may wish to read this specification that I started writing for a kitchen timer for ideas: <http://www.smiffysplace.com/nixie-kitchen-timer> Cheers M -- Matthew Smith Smiffytech - Technology Consulting & Web Application Development Business: http://www.smiffytech.com/ Personal: http://www.smiffysplace.com/ LinkedIn: http://www.linkedin.com/in/smiffy
2008-06-08 by Bill Maxwell
Might be worth a look ar www.siliconchip.com.au. They published a light box design from a fellow Tasmanian. He included a PIC timer pcb and code with the article. I'm sure pcb pattern and code are downloadable from that site. Cant quite remember which month it was published but I'm sure it was late in 2007. Sing out if you cant find it. I have the magazine here somewhere. Bill VK7MX Leon wrote:
> ----- Original Message ----- > From: "Howard" <hj.payne@...> > To: <Homebrew_PCBs@yahoogroups.com> > Sent: Saturday, June 07, 2008 3:21 PM > Subject: [Homebrew_PCBs] HELP: UV Light box > > > >> Hi all >> I need a timer for my uv light box that i have just made this week >> range from about 0 to 10 mins would do the trick. >> >> Anyone got any diagrams and pcb layouts (single side) for making one ? >> >> something like, counts down then switchs off and sounds a buzzer ?? >> > > I just use a timer program for my Palm PDA. I occasionally forget to start > it when I switch the unit on, or don't notice the alarm, though. > > Leon > -- > Leon Heller > Amateur radio call-sign G1HSM > Yaesu FT-817ND transceiver > Suzuki SV1000S motorcycle > leon355@... > http://www.geocities.com/leon_heller > > > ------------------------------------ > > Be sure to visit the group home and check for new Links, Files, and Photos: > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links > > > > >
2008-06-08 by Leon Heller
I'm in the process of making the display PCB for my prototype. It uses two 7-segment LED displays and will plug into the little PCB supplied with the PICkit 2, and use the supplied 16F690. When the software is working, I'll design a PCB for the whole system, with a reed relay etc. Leon
2008-06-08 by electrophilip
I am using an old flatbed scanner as a light box at the moment and have a Jaycar kit timer. It has adjustable start\stop times. I have wired a buzzer across one set of relay "NC" contacts so when not active buzzer sounds, and my light box is wired through th "NO" contacts. When I power it up the buzzer sounds while i'm placing boards etc. When I press the start button buzzer goes off and light comes on and vice versa when timing is done. Philip
2008-06-09 by Howard
--- In Homebrew_PCBs@yahoogroups.com, "Leon Heller" <leon355@...> wrote: > > I'm in the process of making the display PCB for my prototype. It uses > two 7-segment LED displays and will plug into the little PCB supplied > with the PICkit 2, and use the supplied 16F690. When the software is > working, I'll design a PCB for the whole system, with a reed relay etc. > > Leon > Hi Leon Would this design be able to use single side board, as iam not up to speed on making double side one's ?? As your uesing two 7-segment LED displays, is the time displyed as mins or secs, and what is the max time ?. Instead of useing a reed relay, can it use a dpdt one ?. Thanks again for your help Looking forward to hearing from you soon Howard
2008-06-09 by Leon
----- Original Message -----
From: "Howard" <hj.payne@...> To: <Homebrew_PCBs@yahoogroups.com> Sent: Monday, June 09, 2008 1:19 PM Subject: [Homebrew_PCBs] Re: HELP: UV Light box > --- In Homebrew_PCBs@yahoogroups.com, "Leon Heller" <leon355@...> > wrote: >> >> I'm in the process of making the display PCB for my prototype. It > uses >> two 7-segment LED displays and will plug into the little PCB supplied >> with the PICkit 2, and use the supplied 16F690. When the software is >> working, I'll design a PCB for the whole system, with a reed relay > etc. >> >> Leon >> > Hi Leon > Would this design be able to use single side board, as iam not up to > speed on making double side one's ?? > > As your uesing two 7-segment LED displays, is the time displyed as > mins or secs, and what is the max time ?. Instead of useing a reed > relay, can it use a dpdt one ?. Yes, it will be single-sided. Time will be in unit minutes and tens, up to 99 minutes. I need 11 minutes. I haven't decided on the relay, but I'll accomodate a DPDT one. I've assembled most of the display PCB for the PICkit 2, but I've used a couple of transistors which I didn't have in stock and which have unusual pinouts, I should have them tomorrow. I can then get on with the software. Leon
2008-06-09 by JB
Hi Leon and group Here a link to a small component count PIC count-down timer. (100 minutes) and only need that relay to add. Page is in spanish but explanations in english are at the bottom links http://www.pablin.com.ar/electron/circuito/mc/timer/ Just my 2 cents. Will look forward to your desing. Jose ----- Original Message -----
From: "Leon" <leon355@...> To: <Homebrew_PCBs@yahoogroups.com> Sent: Monday, June 09, 2008 3:19 PM Subject: Re: [Homebrew_PCBs] Re: HELP: UV Light box > ----- Original Message ----- > From: "Howard" <hj.payne@...> > To: <Homebrew_PCBs@yahoogroups.com> > Sent: Monday, June 09, 2008 1:19 PM > Subject: [Homebrew_PCBs] Re: HELP: UV Light box > > >> --- In Homebrew_PCBs@yahoogroups.com, "Leon Heller" <leon355@...> >> wrote: >>> >>> I'm in the process of making the display PCB for my prototype. It >> uses >>> two 7-segment LED displays and will plug into the little PCB supplied >>> with the PICkit 2, and use the supplied 16F690. When the software is >>> working, I'll design a PCB for the whole system, with a reed relay >> etc. >>> >>> Leon >>> >> Hi Leon >> Would this design be able to use single side board, as iam not up to >> speed on making double side one's ?? >> >> As your uesing two 7-segment LED displays, is the time displyed as >> mins or secs, and what is the max time ?. Instead of useing a reed >> relay, can it use a dpdt one ?. > > Yes, it will be single-sided. Time will be in unit minutes and tens, up to > 99 minutes. I need 11 minutes. > > I haven't decided on the relay, but I'll accomodate a DPDT one. > > I've assembled most of the display PCB for the PICkit 2, but I've used a > couple of transistors which I didn't have in stock and which have unusual > pinouts, I should have them tomorrow. I can then get on with the software. > > Leon > > > ------------------------------------ > > Be sure to visit the group home and check for new Links, Files, and > Photos: > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links > > >
2008-06-09 by Myc Holmes
Thats a pretty standard design. For the beginner, klook the PICAXE chip. A PIC micro that is programmed in BASIC, needs only a couple resistors to program, the software is a free download, and it's cheap. http://www.rev-ed.co.uk/picaxe/ Rather play play around with the 7 segments LED displays and the drivers and the wiring,, just get one of the low cost LCD's. Brain at Wulfden has some nicLCDs along with a serial interface. I've used a few of them. http://wulfden.org/k107/order.shtml Myc On Mon, Jun 9, 2008 at 1:36 PM, JB <123@...> wrote: > Hi Leon and group > Here a link to a small component count PIC count-down timer. > (100 minutes) and only need that relay to add. > Page is in spanish but explanations in english are at the bottom > links > > http://www.pablin.com.ar/electron/circuito/mc/timer/ > > Just my 2 cents. > > Will look forward to your desing. > > Jose > > ----- Original Message ----- > From: "Leon" <leon355@... <leon355%40btinternet.com>> > To: <Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>> > Sent: Monday, June 09, 2008 3:19 PM > Subject: Re: [Homebrew_PCBs] Re: HELP: UV Light box > > > ----- Original Message ----- > > From: "Howard" <hj.payne@... <hj.payne%40ntlworld.com>> > > To: <Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>> > > Sent: Monday, June 09, 2008 1:19 PM > > Subject: [Homebrew_PCBs] Re: HELP: UV Light box > > > > > >> --- In Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>, > "Leon Heller" <leon355@...> > >> wrote: > >>> > >>> I'm in the process of making the display PCB for my prototype. It > >> uses > >>> two 7-segment LED displays and will plug into the little PCB supplied > >>> with the PICkit 2, and use the supplied 16F690. When the software is > >>> working, I'll design a PCB for the whole system, with a reed relay > >> etc. > >>> > >>> Leon > >>> > >> Hi Leon > >> Would this design be able to use single side board, as iam not up to > >> speed on making double side one's ?? > >> > >> As your uesing two 7-segment LED displays, is the time displyed as > >> mins or secs, and what is the max time ?. Instead of useing a reed > >> relay, can it use a dpdt one ?. > > > > Yes, it will be single-sided. Time will be in unit minutes and tens, up > to > > 99 minutes. I need 11 minutes. > > > > I haven't decided on the relay, but I'll accomodate a DPDT one. > > > > I've assembled most of the display PCB for the PICkit 2, but I've used a > > couple of transistors which I didn't have in stock and which have unusual > > pinouts, I should have them tomorrow. I can then get on with the > software. > > > > Leon > > > > > > ------------------------------------ > > > > Be sure to visit the group home and check for new Links, Files, and > > Photos: > > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links > > > > > > > > > [Non-text portions of this message have been removed]