433MHZ tx/rx modules on EBAY

R

Ruzzz

Member
Hello all

I saw these on ebay and so I thought time to play with wireless :)

http://stores.shop.ebay.co.uk/Quasar__W0QQ_armrsZ1

I've got 2 x QAM RX4, 2 x QAM TX1 and 2 x QAM TX3

The size of the TX3 is smaller than the photo !

I think I'm going to use that, with a surface mount 08M, a DS18B20 and a 2032, to make some temperature monitoring socks for the wife, to PROVE she has cold feet :D
 
D

Dippy

Moderator
How much is P&P from that Ebay supplier? Delivery times? Returns efficiency?

I only ask as those modules are slightly more expensive direct from Quasar, minimum order is £20 and P&P is £2.95 for UK buyers.
.... and they are, based on previous experience, very good with returns/support.

Obv the circumstances are different for non-UK people.
 
R

Ruzzz

Member
I ordered on sunday and got them on wednesday.

Postage was £1 + £0.05 for each of the same type.

BUT..... the name of the company on ebay is...........Quasar.........
 
M

manuka

Senior Member
Perhaps let us all know how they work out. I half suspect they'll be quite low power & ranges may not be the best. In general (on the 433 MHz ISM band), AM units will be inferior to FM types- rather reflected in their EBay pricing!
 
D

Dippy

Moderator
Yes, I'd like to know perfromance too.

For an extra quid you could have had superior FM versions.

Was price the main (or only) criterion?
 
A

Andrew Cowan

Senior Member
It's hard to justify spending money on FM versions when they are just for experimenting/stocking up parts drawers.

I'll let you know how they are when they arrive.

A
 
P

PerthEng

Member
As I see it, QUAZAR UK have both AM (ASK) and FM (FSK) on ebay:

AM Radio Transmitter Module QAM-TX1 433MHz ASK £2.50

AM Radio Receiver Module QAM-RX4 433MHz ASK £5.00

FM Radio Transmitter Module QFM-TX1 433MHz FSK SMT £5.50

FM Radio Receiver Module QFM-RX1 433MHz FSK £7.00
 
D

Dippy

Moderator
Yes, i get the point.

I just hope you don't run low on range and think 'If only I'd spent the extra quids..' :)

Probably be fine for short range, let us know how it goes.

Meanwhile I'll spend even more quids and have RSSI.
 
M

MartinM57

Moderator
Any idea what form/length the (FM if it makes any diiference, but I doubt it) aerial needs to be?

If I only wanted, say, 3m range, would no aerial at all work? Or just a short piece of damp'ish string?
 
R

Ruzzz

Member
For the initial project, ( the temperature monitoring socks ) range isnt really a problem ( from one end of the bed to a bedside table ), but size is. Hence the TX1 to breadboard/proof of concept and the TX3 for fixing in the socks.
 
R

Ruzzz

Member
When I'm home, I even warm her side of the bed first, but I work shift and am away from home a lot of the time :(
 
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