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Re: Relay light control problem
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Yes, that helps! Thank you!
Regards
Simon
---
"sorrowful, yet always rejoicing; poor, yet making many rich; having
nothing, and yet possessing everything" 2 Cor 6:10
On 13 February 2017 at 08:38, 'Simon Coates' simon@xxxxxxx
[ukha_d] <ukha_d@xxxxxxx> wrote:
> Simon,
>
>
>
> It=E2=80=99s caused by arcing at the relay contacts since you are
switchi=
ng an
> inductive load.
>
> Options:
>
> Add bidirectional transient-voltage-suppression across the existing
relay
> output to snub the arcing.
>
> Use you GPIO board relay to switch another relay that is inductive
rated
> i.e. a small contactor or solid state relay.
>
> Change the fluorescent fittings for ones with high frequency ballasts.
>
>
>
> The best solution is probably adding the additional relay.
>
>
>
> HTH
>
>
>
> Simon
>
>
>
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx]
> Sent: 13 February 2017 08:14
> To: UK Home Automation List <ukha_d@xxxxxxx>
> Subject: [ukha_d] Relay light control problem
>
>
>
>
>
> Hi
>
>
>
> I've recently been trying to use relays to control the internal lights
in
> my garage, but I've been having issues. They are fluorescent tubes,
two
> controlled by each relay. The relays are those ones you see all over
eBay=
,
> with GPIO level inputs for control by a Raspberry Pi etc.
>
>
>
> The issue I've had is that after a while they simply stick, always on.
So
> when the pi sends the signal for them to go off, the lights stay on.
>
>
>
> I initially thought it was a faulty relay, but I ordered a replacement
an=
d
> fitted them on Saturday, and now one side is stuck again.
>
>
>
> Is it something to do with the load of these fluorescent tubes? Any
ideas=
?
>
>
>
>
> Regards
>
> Simon
>
> ---
>
> "sorrowful, yet always rejoicing; poor, yet making many rich;
having
> nothing, and yet possessing everything" 2 Cor 6:10
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
> Posted by: "Simon Coates" <simon@xxxxxxx>
> ------------------------------------
>
>
>
> ------------------------------------
>
> Yahoo Groups Links
>
>
>
>
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<div dir=3D"ltr">Yes, that helps! Thank
you!=C2=A0</div><div class=3D"gmail=
_extra"><br clear=3D"all"><div><div
class=3D"gmail_signature" data-smartmai=
l=3D"gmail_signature"><div
dir=3D"ltr"><div><div
dir=3D"ltr"><div><div dir=
=3D"ltr"><div><div
dir=3D"ltr">Regards<br><br>Simon<div>---</div><div><div
=
style=3D"margin-bottom:0px;margin-left:0px;padding-bottom:5px"><div
style=
=3D"overflow:hidden"><div
dir=3D"ltr"><div><div
dir=3D"ltr"><span style=3D"=
font-size:13px;color:rgb(51,51,51);font-family:'lucida
grande',taho=
ma,verdana,arial,sans-serif;line-height:17px">"</span><font
color=3D"#=
333333" face=3D"lucida grande, tahoma, verdana, arial,
sans-serif"><span st=
yle=3D"font-size:13px;line-height:17px">sorrowful, yet always
rejoicing; po=
or, yet making many rich; having nothing, and yet possessing
everything&quo=
t; 2 Cor 6:10</span></font></div></div><div
style=3D"font-size:13px"></div>=
</div></div></div><div
style=3D"font-size:13px"></div></div></div></div></d=
iv></div></div></div></div></div></div>
<br><div class=3D"gmail_quote">On 13 February 2017 at
08:38, 'Simon Coa=
tes' <a href=3D"mailto:simon@xxxxxxx";>simon@xxxxxxx=
</a> [ukha_d] <span dir=3D"ltr"><<a
href=3D"mailto:ukha_d@xxxxxxx=
m"
target=3D"_blank">ukha_d@xxxxxxx</a>></span>
wrote:<br><block=
quote class=3D"gmail_quote" style=3D"margin:0 0 0
.8ex;border-left:1px #ccc=
solid;padding-left:1ex">Simon,<br>
<br>
<br>
<br>
It=E2=80=99s caused by arcing at the relay contacts since you are
switching=
an inductive load.<br>
<br>
Options:<br>
<br>
Add bidirectional transient-voltage-suppression across the existing relay
o=
utput to snub the arcing.<br>
<br>
Use you GPIO board relay to switch another relay that is inductive rated
i.=
e. a small contactor or solid state relay.<br>
<br>
Change the fluorescent fittings for ones with high frequency
ballasts.<br>
<br>
<br>
<br>
The best solution is probably adding the additional relay.<br>
<br>
<br>
<br>
HTH<br>
<br>
<br>
<br>
Simon<br>
<br>
<br>
<br>
From: <a href=3D"mailto:ukha_d@xxxxxxx";>ukha_d@xxxxxxx</a>
=
[mailto:<a href=3D"mailto:ukha_d@xxxxxxx";>ukha_d@xxxxxxx</a=
><wbr>]<br>
Sent: 13 February 2017 08:14<br>
To: UK Home Automation List <<a href=3D"mailto:ukha_d@xxxxxxx";>u=
kha_d@xxxxxxx</a>><br>
Subject: [ukha_d] Relay light control problem<br>
<div><div class=3D"h5"><br>
<br>
<br>
<br>
<br>
Hi<br>
<br>
<br>
<br>
I've recently been trying to use relays to control the internal
lights =
in my garage, but I've been having issues. They are fluorescent
tubes, =
two controlled by each relay. The relays are those ones you see all over
eB=
ay, with GPIO level inputs for control by a Raspberry Pi etc.<br>
<br>
<br>
<br>
The issue I've had is that after a while they simply stick, always
on. =
So when the pi sends the signal for them to go off, the lights stay
on.<br>
<br>
<br>
<br>
I initially thought it was a faulty relay, but I ordered a replacement and
=
fitted them on Saturday, and now one side is stuck again.<br>
<br>
<br>
<br>
Is it something to do with the load of these fluorescent tubes? Any
ideas?<=
br>
<br>
<br>
<br>
<br>
Regards<br>
<br>
Simon<br>
<br>
---<br>
<br>
"sorrowful, yet always rejoicing; poor, yet making many rich;
having n=
othing, and yet possessing everything" 2 Cor 6:10<br>
<br>
<br>
<br>
<br>
<br>
</div></div>[Non-text portions of this message have been
removed]<br>
<br>
<br>
<br>
------------------------------<wbr>------<br>
Posted by: "Simon Coates" <<a href=3D"mailto:simon@geeoffshore=
.co.uk">simon@xxxxxxx</a>><br>
------------------------------<wbr>------<br>
<br>
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