@tehmilcho the ground (black) from the 12v battery should also be connected to the arduino ground, now there is no potential difference for the signal wire (purple)
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Geeetech 433Mhz Superheterodyne 3400RF Transmitter and Receiver - with 12V?
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@sajo ahh… just that i understand it right… you mine like this?
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Now its works… yippie … @sajo Thanks alot, you are awesome!
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@tehmilcho That’s great. Please keep us posted about your results! In particular, I would like to know if transmission range has improved in your setup. I read controversary posts about the matter and there was no conclusion, really.
Did you also consider de-noising the power rail with capacitors? Just wondering as this improved the range in my setup.
"It always takes longer than you expect, even when you take into account Hofstadter's Law.", Hofstadter's Law
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@tehmilcho Yep, thasts correct!
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@mwittig What type and values of capacitors did you use? Perhaps it is interesting for my setup as well. Is it for the transmitter or the receiver?
@tehmilcho Did the range increase with your modification?
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Mhh i cant say how mutch better the performance / range now are because it have the same Problem. My Switches will sometimes not work proper… but there just 3-4m from the Transmitter away… so i thinked maybe is the signal to weak. But i if have the same Problems with 12V… i think now it must be a problem with the antenna or other sources of interference because i have the Raspberry, my NAS and my Fritzbox (router) in a small cabinet…
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@rikki78 said in Geeetech 433Mhz Superheterodyne 3400RF Transmitter and Receiver - with 12V?:
What type and values of capacitors did you use? Perhaps it is interesting for my setup as well. Is it for the transmitter or the receiver?
I am using a 100nF ceramic and a 10uF electolytic capacitor on the power rail. The gain is on the receiver side, basically, but it may also improve the receiver side. See also the following diagram from http://www.nemcon.nl/blog2/wiring which suggested using three capcitors. I haven’t used the aliminium foil as my receiver is shielded.
"It always takes longer than you expect, even when you take into account Hofstadter's Law.", Hofstadter's Law
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@rikki78 said in Geeetech 433Mhz Superheterodyne 3400RF Transmitter and Receiver - with 12V?:
@tehmilcho Did the range increase with your modification?
little update… i removed my antenna now completely and it works perfect in my whole Apartment (64qm) with 12V.
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@tehmilcho said in Geeetech 433Mhz Superheterodyne 3400RF Transmitter and Receiver - with 12V?:
little update… i removed my antenna now completely and it works perfect in my whole Apartment (64qm) with 12V.
What kind of antenna did you use? Did you keep the antenna on the receiver?
"It always takes longer than you expect, even when you take into account Hofstadter's Law.", Hofstadter's Law
