[555 timer help]

my mistake, ment to be 12v

[555 timer help]

i have attached a what i think is a 120off / 1 sec on
Can someone check it over and tell me if its ok.
Also is it possible to make it 10 mins off 2sec on, and i need to put a reed switch on it somewhere to turn it on when switches are on.
Also with the 120off/1on will it reset back to 120 after the on state.
Thanks

[How to get low level from high (audio)]

I only have one line out from my head unit but want it to run 2 amps, is there any way to make a good quality volume decreaser for the high speaker out to convert it to line out?
Would be good with a volume control too.
Thanks

[LVD ultra2 scsi terminator]

Anyone have a schematic?
Thanks

[Car inverter + 12v to 19v + 555 timer]

Unsure about the projector, i just know its 240v au. its my friends.

As for the timer, the printheads are xaar heads and need to either be sprayed with solvent every 10 mins or so or purged to push ink through them to stop them drying out, the heads are like $600 each and each printer has 24 in them.

[Car inverter + 12v to 19v + 555 timer]

Any other ideas.
Tanks Ante too

[Car inverter + 12v to 19v + 555 timer]

Can anyone help with these
Car Inverter;
im after making a car inverter for 240v for using my projector when out in the bush somewhere. Any help / schematics are great thanks

12v to 19v
I want to use my laptop in the car so i can plug it into the cig lighter socket, any ideas?

555 timer;
Im trying to make a timer circuit that makes the purge blocks on a printer push air to the print heads every 10 mins. say 10 min wait, 2 sec purge, but only when the head carrage is in park possition not while printing.

Thanks in advance.. ::)

[Which one do i use?]

Ok found somewhere to get the bits for the ir network but there are so many types.
Could someone please look here
http://www.newark.com/NewarkWebCommerce/newark/en_US/endecaSearch/searchPage2.jsp?specialorder=on&Ntt=74as04&newSearch=true&Nto=74hs&Nty=1&showImages=true&N=0&Ntk=gensearch
And tell me which one to use as on the schematic it just says 74as04.

Any help appreciated. thanks

[Now im confused! RE RJ45 ir network]

Ok ive hunted alover for the hs parts and cant find them anywhere worldwide.
Could some kind person possibly redraw or tell me some parts i can use in replacment.
my wife is getting sick of tripping over the network cable in the living room.
Thanks
Stu

[Need help with 2 ideas]

Thanks all for your input,
the idea was that i have a digi volt meter brought, but wanted to make it when i flick the switch it shows me the amperage so i can see how many amps my amps are sucking from the battery.

[\Need these parts. please look in]

After looking for over a month now i still cant find them anywhere in Australia. Thanks to those for helping.
Im not to the point where could someone post them to me, of course i will pay. either cash or paypal.
I really want to make this network circuit.

Parts needed are.
74hs04
74hs08
74hs14
74as04
74as08
74as14

10 of each.
Thanks whoever can help.
Stu

[12v lamp Dimmer lamp ideas?]

I have a 12v transformer for interior lights and a few lights for it, but want to make it a dimmer light. the working amps are 250mA.

I would like to know how to wire up these three ways, so i can try each one and see if its any good and use the best....

Touch lamp. touch the metal to turn on dimmest. press again for brighter and again for brighter and again for off.

Manual pot adjuster.

and digital potentimeter. press up to turn up and make brighter and down for darker / off, and a reset button to turn instant off.

Any help and sche... will be helpfull.
Thanks in advance

[Any aussies please read]

If you are australian or know of any places good in australia for buying parts please leave a link for me, rs components are getting boring for not having anything..
Thnaks
Stu

[Perhaps a 555 circuit]

Hi, where i work at a large format printers, printing the billboards seen on roads / buildings, im the techie, im trying to make a timer to get people to take more care of the machines, each machine has 24 xaar heads about 600 usd each and they need looking after.
I want to make a circuit so when the carrage goes to the park possision the timer starts counting, when it gets to mabey 15 mins a buzzer comes on, now they can either spray the heads and press reset or put the nightcover on, i want a main on/off switch but also the night over has a reed switch on it so the heads stop firing, can i somehow hook it to that so if they put the cover on the timer turns off, till its taken off again.
Any help would be of use, thanks
Stu

[Trying to build a project, need parts]

sadly no.
Im orig from the uk 2 1/2 yrs ago, and i must admit, aus it a bit behind in the times with some stuff. and electronics is one of them.

[Trying to build a project, need parts]

Im trying to buld the rj4 ir network in the projects page but cant get hold of the parts
74hs04
74hs08
74hs14

Could someone look here www.rsaustralia.com
and see if they sell any parts i can use instead

Im going insane rying to work it out
Thanks in advance
Stu

[please help FM transmitter]

Ive built this www.uoguelph.ca/~antoon/circ/fmt3.htm but it only seems to be very faint at 108fm on the radio, and cant get it any better, am i doing something wrong?
Please can you have a look if things look ok,
or a way to move it lower in the fm range and make a little more power to it,
Thanks

[RJ45 network card to IR]

Yet again my neck of the woods prevents me from making things like the rest of the world, Could someone please spent 5 mins and tell me what i can use in place of the hs series used, i seen on my supplier (only one available for 1000s of ks) is the LS or HC series?
Please help before my wife tips over the network cable to my laptop in the lounge and breaks her neck.

[RF Houselight control]

Looks good thanks mp, just i dont have the full know how to modify it, also some of the parts dont have ID so unsure what they are,
If anyone can help.
Thanks
Also the voltage here is 240v

[12v car to 5v dc 2.5a needed]

ive found this one LM2576 to be a match too and alot cheaper, its jsut the variations of it,
this is where i can get components from in australia, /www.rsaustralia.com What is the suitable one i need from there?
Thanks

[RF Houselight control]

Yes thats the sort of thing i mean, but lasttime i ordered something from the us the postage was $30 and the delivery was 9 weeks.
Is that thing easy to make?
Thanks

[RF Houselight control]

Me and the wife are having a baby in 2 weeks and ive been thinking about a dim light for the bedroom for night feeding, but came up with a better idea,
The bathroom light 240v, is ideal light in the bedroom also for when she goes out the room,
Is there anyway to make it so she can have a small on/off remote next to the bed and on feed time press the remote for the light on, and same for off?
Thanks for your help in advance.

[12v car to 5v dc 2.5a needed]

Thanks ante, the only problem is i cant get the stepdown from over australia :(
do you know of a replacement?
Thanks

[12v car to 5v dc 2.5a needed]

Hi, can anyone help with a schematic for a car 12v to 5vdc 2.5A so i can use my mp3 player in the car instrad of buying expensive batteries all the time...
Thanks
Stu

[RJ45 network card to IR]

I cant find any replacemnts for the 74hs over in this part of the world (AUS) can anyone help me out, i really want to build this..

the best place for bits if from here www.rsaustralia.com