Remote switching by radio transceivers.

I used to play around with the tranceivers used in controller doors. Cant remember the brand (ademco???), but they had various models including one with almost a k range. Just a small mod to adapt the transmitter, and the receiver is an open cct board with a choice of momentary or latching contacts. No need to muck around with sound sensors, just wire it directly to the pump wiring via a hd relay. Where a larger range is required, a modified CB UHF radio works wonders. I set up a few to control boom gates to access remote coal mines.

Hi

Thanks for your letter.

For the first application I may be able to get away without a buzzer. However, for the second application for the rain sensor I think I would need buzzer. Don't you think so?

Do you think the units at

The info on 4 units

Could you draw or do you know of how one would be directly wired in via a Hd relay?

STOCK-CODE: DC1040 RRP: $89.00

Our most powerful unit has a range of up to 8km, and with a 1.5W output, it is certainly NO toy. This high-quality lightweight UHF transceiver is ideal for use in many professional and leisure activities, including hiking, camping, farming, building, inter-car road trip communication, IT & Electrical installation. The savings made over mobile phone calls would see these radios pay themselves off very quickly indeed!

- Covers Australian 40 UHF CB channels and repeaters

- Green backlit LCD screen

- 1.5W maximum RF output

- Range up to 8km

- No license required

- Low / High power setting

- Fully compliant with Australian CommunicationAuthority guidelines

- ACA approved

- Uses 4 x AAA Ni-MH rechargeable batteries, not included (use our SB-1723)

- Size: Body only 120(H) x 65(W) x 35(D)mm

- Antenna length 57mm.

STOCK-CODE: DC1010 RRP: $34.95

This lightweight handheld transceiver is suitable for all manner of professional and leisure activities such as hiking, leisure, use on building sites, IT-cablers, electricians, inter-car road trip communication, farming, etc. Open field transmission range is up to an incredible 5km, with typical city range up to one kilometre. Tested in the light industrial area of our Silverwater headquarters in Sydney, and we achieved a clear range of over 4 blocks.

- Covers Australian 40 UHF CB channels and repeaters

- Green backlit LCD screen

- 0.5W maximum RF output

- Range up to 5km

- No license required

- Uses 4 x AAA Ni-MH rechargeable batteries, not included (use our SB-1739)

- Size; body only 105(H) x 60(W) x 35(D)mm.

- Antenna length 50mm.

STOCK-CODE: DC1025 RRP: $59.95

With the tremendous success of our DC-1010 transceiver, it is no wonder that it has been enhanced with even more features, and in a much more compact design. Features a recharging base that charger two transceivers simultaneously, so their ready to go when you are. Secondly, it has a 4 step scrambling function which allows you to communicate privately on what is normally a "public" broadcast. Includes one transceiver and charging base. Each transceiver is supplied with a rechargeable 650mAH pack however 3 x AAA batteries can be used in emergencies. Available accessories are hands free earpiece (DC-1039), 12VDC Car Charger (DC-1036), and VOX Headset (DC-1032, see page 17).

- UHF FM transmission

- No license required

- 500mW output power

- Up to 5km transmission range

- 40 Channels and 38 sub-codes

- Babysitter and monitor function

- Dual watch function

- VOX function

- Auto power off timer

- Stop watch function

- Electronic volume

- Repeater function

- Automatic squelch function

- Battery level indicators

- Key lock function

- Key tone function

- LCD back-light function

- Support external headset

- Support external AC-DC charger

- ACA approval One Transceiver with Charging Cradle Cat. DC-1025 Extra Transceiver with Battery only Cat. DC-1028 Spare Battery to Suit Cat. DC-1029

STOCK-CODE: DC1028 RRP: $49.95

(Image shown is the DC-1025 model)With the tremendous success of our DC-1010 transceiver, it is no wonder that it has been enhanced with even more features, and in a much more compact design. Features a recharging base that charger two transceivers simultaneously, so their ready to go when you are. Secondly, it has a 4 step scrambling function which allows you to communicate privately on what is normally a "public" broadcast. Includes one transceiver and charging base. Each transceiver is supplied with a rechargeable 650mAH pack however 3 x AAA batteries can be used in emergencies. Available accessories are hands free earpiece (DC-1039), 12VDC Car Charger (DC-1036), and VOX Headset (DC-1032, see page 17).

- UHF FM transmission

- No license required

- 500mW output power

- Up to 5km transmission range

- 40 Channels and 38 sub-codes

- Babysitter and monitor function

- Dual watch function

- VOX function

- Auto power off timer

- Stop watch function

- Electronic volume

- Repeater function

- Automatic squelch function

- Battery level indicators

- Key lock function

- Key tone function

- LCD back-light function

- Support external headset

- Support external AC-DC charger

- ACA approval One Transceiver with Charging Cradle Cat. DC-1025 Extra Transceiver with Battery only Cat. DC-1028 Spare Battery to Suit Cat. DC-1029

Your help is appreciated, Regards Richard.

What range are you looking at?

However, for the second application for the rain sensor I think I would

Hi

Thanks for your letter.

For the first application for the irrigation sensor it would probably be less than 500 meters

For the second application for the rain sensor, I am thinking of possibly about 3km.

Your help is appreciated, Regards Richard.

how about the a 433Mhz transmitters/receiver pair like jaycar cat# ZW-3100, ZW-3102

under $10 each.

they should have 50-100m range with just the straight antenna, and much more with directional antenna. (like a UHF TV antenna that covers the the frequency they use)

using CB radios for remote controls may not be legal...

Bye. Jasen

another unpaid net cop! who gives a f*ck

: : using CB radios for remote controls may not be legal... : : Bye. : Jasen

Hi Jasen or whoever can help

Thanks for the info

Do you know what range the 433Mhz transmitters/receiver pair like jaycar cat# ZW-3100, ZW-3102

I looked at a file on the site but could not see it.

How hard would they be to wire up? Would they be harder than the earlier complete units I referred to? Also, would they have any disadvantages to the earlier units that I posted data on above?

Your help is appreciated, Regards Richard.

I would find them easier to wire up... they have an output that can be used to drive a transistor to operate a relay, no messing with buzzers and sound detectors, no hassle if the CB transmitter won't stay locked to your chosen frequency when the power is disconnected...

another advantaage is the lower power consumption, one disadvantage is probably much reduced range.

they are designed to send data, but will work just sending a carrier (empty radio signal)

to find out if they're suitably you may need to buy a pair and do some experiments. unless you can figure out how well the antennas in the document (or others you may substitute) will work. I recall a sensitivity figure for the receiver.

someoone who understands the theory behind transmitters, antennas and receivers caqn probably tell you what sort of range you could get.

I can guess, but that's all.

Hi Jason or whoever can help

Thanks for the info.

Could you possibly draw a circuit diagram or know where I could find one of how the 433 MHz transmitters/receiver could be wired up for my purpose?

It is probably easier to email me. My address is weather at truesolutions.info or you can go to

Do you know who may know more about them or who could help me wire them up?

Perhaps an antenna could be connected to them to extend the range.

Your help is appreciated, Regards Richard.

It might be worthwhile reading the Silicon Chips article (earlier this year) on using these modules - IIRC they were able to get well over a km range, but do not rely on my memory - check out their article for yourself

David

" snipped-for-privacy@yahoo.com" wrote:

Hi

Thanks for your letter.

Do you know the address of the webpage where I can find the article?

Do you know anyone who could help me make up the circuit or do you know of any circuit diagrams of how it could be wired up for my purpose?

Your help is appreciated, Regards Richard.

Have a look at Silicon Chip November 2003 issue. There is an article 'Smart radio modem for microcontrollers' which should explain all you need. The author also supplies kits. If you can't find SC in the library, get onto the SC website - siliconchip.com.au - the publishers can supply either a copy of the article or the whole magazine.

Dave

Hi

Thanks for your letter.

Is all the information in the link at

However, I do not see a circuit diagram like in another Nov 2003 article at

Your help is appreciated, Regards Richard.

If you bother to read the first page fully, you will see a line saying "click here for online access to the rest of this article" - if you click on this you can then buy online access to this article for $8.80.

How much more hand holding do you need ?

Dave

Hi

Thanks for the info. The problem is I do not know much about electronics and have an enormous amount of projects to do and do not get time to make these things up. I would rather pay someone to make up the kit for me. They may also know of where the information can be freely found. I thought there may be many places where such information can be freely found which would be easier. Do you have any ideas of where I can search or who could help me make these things up?

Your help is appreciated, Regards Richard.

David

" snipped-for-privacy@yahoo.com" wrote:

The December 2005 issue of Siliconship has an article on the use of small xmitter/rec modules (the $10 ones from Jarcar) complete with a circuit to interface them with a PICAXE microcontroller.

They obtained a range of about 1km using a coat hanger antenna

David

Dave Goldf> >

Well gee whiz Richard - the other Dave and I have given you all the info you need to obtain an article complete with circuit etc on how to do what you want - need your bum wiped too?

David

" snipped-for-privacy@yahoo.com" wrote:

Hi David or who can help

Thanks for your info on the range of the system. However, it would be better if it worked for 2 or 3 km line of sight for the rain sensor and by the looks of it the transmitter that you mention does not do that. However, the one you mention would be good for the irrigation sensor. The problem is as I said I do not have electronics experience and would need someone to help me make it up. Also I have so many other projects so time does not allow me to do the electronics. If you know anyone that can help, please let me know.

For the rain sensor and maybe even the irrigation sensor I thought it could be easier if I went back to my original idea and just bought the transceivers that are made up. There are some at

A leaf wetness sensor could be placed about 3 km away in the direction where the rain normally comes from. When the sensor gets wet. It could sound a buzzer that would activate the voice activated transceiver. The buzz would then be heard on the receiver part of the transceiver that would be in my house. This would alert me when a shower of rain is coming. When the rain sensor dries out the buzzer would stop. A circuit diagram of the rain sensor connected to the buzzer is at

This may save a lot of wiring up. What do you think?

Your help is appreciated, Regards Richard.