VELLEMAN MK171 Voice Changer Kit, 1.5"

The voice changer worked out great! It does not include a speaker, so remember to get one. The board is clearly labeled, and the instructions inside help you map the components. A soldering novice could easily complete this project. The finished product is very effective, just pay attention to the mic sensitivity adjust. Definitely a fun project, and great for costuming. Note that the components are soldered in individually. This makes it pretty easy to put speakers, mics, buttons, and volume knobs in more convenient locations. Just a bit of wire, and you're set.

After 4 hours of hard work building the circuit, the item did not function as expected. I have experience with soldering, but for whatever reason, it did not work as intended. The lights and sound came on which means I wired everything correctly, but the mic did not pick up any input so it sounded like just a un-tuned radio. Great learning project for an inexperienced child. Also, the battery and speaker connection instructions do not make sense to use tabs. Not sure what that is about.

While I found the directions laid out very well - the quality of the PCB is very poor. I am a EE and use a soldering station frequently. I have never seen solder pads pull away from the PCB so easily. I lost 3 seperate copper pads which rendered my board useless. I cannot recommend this product. Too bad as I really wanted this for a Halloween costume.

It is a good starting point, but there are some problems. I ordered two kits. The first kit would not work no matter what I tried. The speaker would not output any sound aside from a slight pop when turning it on. When I soldered one component, the copper began flaking off of the board. The second kit worked, but the included microphone is terrible. It will begin squealing when turned on. I bought a small clip on microphone that helps to filter out background audio and wired it to it. The changer works well enough with this addition. You may also have to play around with the sensitivity adjuster for the mic on the board.

Neat project, works as I thought it would, takes a little bit to learn button sequence.This voice changer sounds like the ones used in the movie "Fun with Dick and Jane" which is what I was hoping for. The only thing I would suggest is to use a speaker at at distance because the mic will pick up the sound coming from the speaker causing unwanted feed back. All and all I would recommend this for someone looking for a fun project. The only reason for 4 star rating is the pins used as audio out, I would rather the kit include a headphone jack instead.

SO it's not an easy job, I have a bit of experience (nothing in a few years) of soldering so I'm rusty but I still managed to get it to work. Works pretty well when its done, just a few bugs here and there. the quality definitely depends on the speaker you get to go with it as well. I do have some advice if your planning on doing this: 1. Find an extra pair of hands, seriously, some of the parts are tall and its hard to make sure everything is in place and solid by yourself so if there's someone you can ask for help holding things, ASK. 2. For everyone that says the resistor codes are hard to read- I have a mind melding piece of info.... they're in order...its not that hard.... but yes starting from the one on the other side of the weird clear with a black line resistor thingy, it goes from number 1 and then next to said clear thing is number 10. (I'd still quickly scan the resistor codes to double check this but I got two kits and both were in numerical order). 3. In case you are unfamiliar with resistor codes, the silver and gold lines that aren't listed as colors on the instructions are obsolete for us (in truth they mark the tolerance of a resistor but we don't need to worry about that since this kit is already set up so the resistors WILL work) 4. If you're wondering what to use for soldering, I used 0.6mm solder wire which served it's purpose nicely and due to how small it was kept it from overflowing into another copper rings. that's all I can really think of besides overall paying attention to the instructions (some of the capacitors use different micro farads so watch what you put where)

This is a great little kit. As stated in many other reviews for this product, you do require a soldering iron and a speaker to assemble this thing fully. The instructions, in my opinion, are excellent. They don't have much words or explanation but they make up for that with their very complete diagrams showing location, orientation, and proper assembly practices. One common problem I've read about this kit is the lack of volume, and while details on preventing this are briefly noted in the instructions, I do see how it could easily be overlooked. First is speaker selection. This circuit is designed for used with either a 4 ohm or 8 ohm speaker, if you use higher resistance speakers (more ohms) then you will get a much quieter output. If you want the most volume possible, pick a 4 ohm as it will give double the Watts of an 8 ohm speaker. Second is the actual amplifier circuit used. This kit uses an LM386 amplifier IC that has a hardware-programmable gain. If you build this kit as specified, it will have a gain of 50. However if you feel that this is insufficient for your particular application, do not place component R10 and instead solder a wire where it should be. By shorting R10, you will increase the gain to a much more substantial 200. (Please note that you MUST put a short in place of R10, if you remove the resistor and leave it open you will get the minimum gain of 20)

1 star because its cheap. 1 star because the wiring diagram was clear. That's the end of the good. I spent 45 minutes wiring it together. I have decent soldering skills and all the connections looked clean. It would work fine one minute, then pop and crackle like crazy the next minute. It seemed to be in a random state every time it was turned on. The button functions seemed backward sometimes and fine at other times. I bought this in order to change my voice for a Kylo Ren Halloween costume. It sounded great for about 2-3 minutes, but I could never get it back to that state again. My advice: don't bother with this. Sure it's cheap, but its not worth the time and frustration.

Quick assembly with beginner's soldering skills. Works great! Resembles Kylo Ren voice. Quality European product.

Tried to make a cosplay voice changer. I am a novice solderer so I could not get this to work at all. Must know how to read circuit wiring diagrams and have experience soldering. Poor instructions

This product is exactly what I was looking for! The package was complete and I was able after an hour or two to build it! It works surprisingly well! Best bang for the buck voice changer!

The DIY kit was of intermediate difficulty, it took some tweaking to reduce the shrill feedback sound, at least with my set up(inside a helmet). It sounded a bit tinny, but it did its job. The price went down, it’s a better value now than before I guess, especially if this is what you’re looking for.

Very easy to build. Resistors code was can be tricky but only took me about a minute to sort them. Added mic and headphone jack to mine so I can use portable amplifier speaker and any mic So it’s very loud and clear.