Mindsets Sound Activated Switch Solder Kit

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Quoting product code: N08JG


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About this product


Product overview

• Build your own sound activated switch
• The circuit responds to loud noises, claps and spoken words – though it won’t understand them
• Simple and fun to solder with 41 parts
• Requires a 12V power supply (not included)

What can I do with this kit?
Start and stop your projects and experiments with a noise. Activate the circuit with a loud noise, hand clap or spoken words like ‘off’ or ‘on’. Even though the circuit won’t understand the meaning, it will still respond. You can set the circuit to switch a device on or off or send a pulse at an adjustable time – eliciting a response from one of the outputs in a circuit. The switch can be used to turn on another circuit using up to 224V at 10 A (not suitable for directly switch mains voltages). This kit comes in 41 pieces and is great for anyone wanting to move on from beginner kits or practise their soldering.

What can I learn from this kit?
This kit is a great introduction to relays. Relays allow you to use a smaller circuit to activate a larger one. This relay has its own power source, and when it detects a loud noise or other stimulus it can complete a larger circuit (up to 24V) to activate an alarm or light. In ‘toggle’ mode, the first sound turns the kit on and the second turns it off. In ‘pulse’ mode, the first sound switches it on and then it switches itself off after a period of time that you can set on the potentiometer. This kit comes with capacitors, resistors, microchips, a relay and a microphone. The kit requires a soldering iron and solder and may require wire cutters.

How easy is this kit to solder?
This kit is ideal for those looking to expand their projects or wanting to progress to the next level. The circuit has a built-in microphone to detect sound and screw terminals to connect to your devices. You can add this in place of a switch in most circuits. This kit requires a 12V DC power supply (not included) that has a jack terminal.

Rated 5 out of 5 by from Fun Little Kit I use these as a device to time the period between two loud sounds as part of a larger circuit. It is cheaper to buy it here than to make the circuit with adjustable sensitivity and as a standard part in a hobbyist solution its ideal. The solder work takes a bit of time, but all components are good and the diagram is right, even if sometimes the parts differ slightly between kits. 10+ of these kits made in one batch and they all solder well and work great
Date published: 2014-11-20
Rated 5 out of 5 by from Fantastic! This kit is perfect - I needed a solution for my soundproof studio - my office next door has two phones, so needed to know when they rang (and not be disturbed by ringing noise!). The sensitivity adjustment works v well, and the relay is switching a 22V bright LED beacon light. The kit is easy to build, would recommend that you have done soldering before, as one of the transistors has v close pins(and to use heat-sink tweezers when soldering the transistors). I have tried quite a few other kits and tools, but this beauty has solved my problem!
Date published: 2015-03-14
Rated 4 out of 5 by from Decisions, decisions ... Decisions, decisions ... Whether to Toggle or to Pulse. No mention is made that you must commit to one mode or the other when soldering the project. Why could it not have included a switch to allow the mode to be selectable after assembly? I wasn't having any of that and I overcame this silly restriction by adding jumper wires in place of the solder bridge. That’s why I’m giving it four stars instead of five.
Date published: 2016-09-02
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Product Specifications

Soldering Required:


Could this be used to trigger a camera flash. Many thank

Asked by: Hobbyda
Unfortunately we are unable to guarantee compatibility for this device.
Answered by: James
Date published: 2017-03-06

Could I use a typical 5metre 12V LED strip light in place of the small LED provided? If yes, any adjustments?

Asked by: Madeit
Unfortunately i cannot give any advice on modifying the parts of this kit or any adjustments you chose to do.
Answered by: Billy
Date published: 2015-10-31

Is there any adjustment included on the level of sound which will activate this device?

Asked by: Chris
Yes the detection level of sound can be adjusted.
Answered by: Billy
Date published: 2015-10-31

Can I use a power source that's greater then the 150mamp that's stated? Can I use this on a 12volt car battery? Thanks

Asked by: Ivorbiggun
How would I go about this?
Answered by: mattyc
Date published: 2015-10-20

Can I alter the time on delay component, R17, it's a 100k potentiometer giving upto 6 sec on delay, I would like to get the timer upto 60 - 90 secs, so what value pot would I fit Any help appreciated

Asked by: Ivorbiggun
Maplin do not advise on the modification or redesign of units I am afraid (as this would affect your product warranty).
Answered by: Dominic
Date published: 2015-10-04

Can this be hooked up to a normal bedside lamp, including the plug to power the device.

Asked by: Craigy31
I am sorry but the item in question does not support use in your intended application.
Answered by: Russell
Date published: 2015-07-17

is the sound detection level adjustable?
Asked by: martin
Can I alter the time on delay component, R17, it's a 100k potentiometer giving upto 6 sec on delay, I would like to get the timer upto 60 - 90 secs, so what value pot would I fit Any help appreciated
Answered by: Andy
Date published: 2015-07-17
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