EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: lulu on October 01, 2022, 05:37:59 am
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Hi there, complete newbie here.
I would like to insert a timer switch (Frontier TM619) into a circuit wiring an power amplifier to a 12V battery. I am struggling to understand how to wire them together and link to 12V battery.
The timer acts as a manual switch.
Below are pics of the timer and the amplifier power input terminals.
Any help much appreciated! Thank you
[attach=1]
[attach=2]
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This page contains an Instruction Guide:
https://timerco.com/index.php?l=product_detail&p=1
Link to the guide: https://timerco.com/images/products/TM%20619%20Instruction%20Guide_Timerco.pdf
You seem to have the "12V AC/DC" version. Connect your 12V battery to terminals 1 and 2. It won't matter which is connected to + and which to -. Terminals 1 and 2 are used to power the timer.
With the battery connected the display should become active and you should be able to program the timer.
How is your amplifier powered? Is it also powered from the 12V battery?
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Thank you!
Yes, I connected terminal 1 and 2 to the 12V battery and the timer is functional. Now how to connect the amplifier (with 3 outputs: B+, GND and REM) to the battery and the timer? The same battery should power the amplifier as well.
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Connect +12 of the battery to terminal 3.
Connect the negative of the battery to the amplifier where it normally would be connected.
Connect terminal 5 to the amplifier where you would normally connect the positive of the battery.
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I am afraid that doesn't work. I wonder if the 'REM' has to be plugged in somewhere for the amplifier to turn on...
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First get the amplifier working directly from the battery.
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This page might explain what the REM terminal is for:
https://soundrating.com/where-to-connect-amp-remote-wire/
First try this:
+12 to B+ and REM
battery ground to GND
If the amplifier works, then connect the timer as follows:
+12 to Timer terminal 3
battery ground to GND
Timer terminal 5 to both B+ and REM
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Thanks. So the amplifier works with:
+12 to B+ and REM
battery ground to GND
but unfortunately it does not when I try (even though the manual switch on the timer is on ON):
+12 to Timer terminal 3
battery ground to GND
Timer terminal 5 to both B+ and REM
I now wonder if there is an issue with that timer... I may try to find another one to test
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Try:
+12 to Timer terminal 3
battery ground to GND
Timer terminal 4 to both B+ and REM
That'll give you info about whether your switch is working or not.
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take the 12v power and attach it straight to the amps +12v and pin 3 of the timer and the rem amp terminal to pin 4,does it work as expected ,if not move the connection from pin 4 to 5 on the time clock.Dont take the B+ via the switching contacts of the time clock.
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@ledtester: when I do this the amplifier turns on but never turns off when switch manually turned off
@themadhippy: same thing, when pin 4 is linked to REM of amp, it turns on but does not turn off while timer switch is turned off