Amplifier and timer switch circuit - Page 1
Forum section: electronics / beginners

author: lulu
author_rank: Newbie
timestamp: October 01, 2022, 05:37:59 am
content: 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

author: ledtester
author_rank: Super Contributor
timestamp: October 01, 2022, 06:16:29 am
content: This page contains an Instruction Guide:https://timerco.com/index.php?l=product_detail&p=1Link to the guide:https://timerco.com/images/products/TM%20619%20Instruction%20Guide_Timerco.pdfYou 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?

author: lulu
author_rank: Newbie
timestamp: October 01, 2022, 07:28:35 am
content: 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.

author: ledtester
author_rank: Super Contributor
timestamp: October 01, 2022, 12:20:43 pm
content: 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.

author: lulu
author_rank: Newbie
timestamp: October 01, 2022, 11:35:28 pm
content: I am afraid that doesn't work. I wonder if the 'REM' has to be plugged in somewhere for the amplifier to turn on...

author: ledtester
author_rank: Super Contributor
timestamp: October 02, 2022, 12:00:15 am
content: First get the amplifier working directly from the battery.

author: ledtester
author_rank: Super Contributor
timestamp: October 02, 2022, 02:00:29 am
content: 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 REMbattery ground to GNDIf the amplifier works, then connect the timer as follows:+12 to Timer terminal 3battery ground to GNDTimer terminal 5 to both B+ and REM

author: lulu
author_rank: Newbie
timestamp: October 02, 2022, 05:11:15 am
content: Thanks. So the amplifier works with:+12 to B+ and REMbattery ground to GNDbut unfortunately it does not when I try (even though the manual switch on the timer is on ON):+12 to Timer terminal 3battery ground to GNDTimer terminal 5 to both B+ and REMI now wonder if there is an issue with that timer... I may try to find another one to test

author: ledtester
author_rank: Super Contributor
timestamp: October 02, 2022, 02:23:16 pm
content: Try:+12 to Timer terminal 3battery ground to GNDTimer terminal 4 to both B+ and REMThat'll give you info about whether your switch is working or not.

author: themadhippy
author_rank: Super Contributor
timestamp: October 02, 2022, 02:46:41 pm
content: 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.

author: lulu
author_rank: Newbie
timestamp: October 02, 2022, 09:24:34 pm
content: @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