Tindie

This module is easy to build, all the steps and information is very well documented. It's also a lot of fun to build. The only 'difficulty' is getting Temperature Compensated resistors, but they're available on the internet. In my case, the oscillators are a tad unstable, which is perfect for the desired purpose of creating a drone like synth. Highly recommended :)

Response from Electronic things... and stuff | July 29, 2024

Thank you so much Jasper for your kind words and your support.
Indeed the tempco can be difficult to source. But it's not mandatory and can be replaced by a simple resistor.
About the instability you mention, it's probably caused by a variation on the power rails as the module doesn't have dedicated regulators/voltage references...
I hope you will enjoy using the VCO.
Thank you again!
David

Roberto | May 10, 2024

Simply perfect

For Sync Mod Board for the MFOS Sound Lab Mini-Synth

If you want a simple stable Vco for a lot of uses this is simply perfect !
Also for beginner cause instructions are the best i ever seen in diy Projects

Bruce | Nov. 30, 2023

The Most Front Panelly, Front Panel EVER!

For MFOS SLMS 33HP Front Panel

Great product and support. I couldn't build one of these front panels for the price. Much too cheap!

Bruce | Nov. 30, 2023

David is an Absolute Asset to Tindie and Synth Community

Amazing products and exceptional communication! I even got a little something extra with my most recent order! Nice touch!

Response from Electronic things... and stuff | Nov. 30, 2023

Thank you so much for your kind words!
Have fun!

Bruce | Oct. 4, 2023

Great PCB Kit!

Quality PCBs and shipped quickly! Seller kindly offered assistance if I had any questions!

Will report back when I've got it assembled and running.

Jerry | July 2, 2023

Easy build, worked first time. Love it

I'm pretty new to the DIY electronics world, am having a great time building up my first Eurorack from 100% DIY kits (just for fun and learning).

I bought the Simple LFO board and panel and challenged myself to buy components locally.

I shouldn't have worried, the BOM made it really easy to source components here (I'm in Australia and JayCar had everything I needed).

The instructions were very clear and easy to follow and the kit didn't take long to build, even with me checking everything 3 times before powering on.

The instructions for testing are a comfort too - nice to be able to run some simple checks with a multimeter so you are more confident that you've not screwed it up :-)

So the build was fun, the documentation great and it works well!

Very happy and impressed with David's stuff (I've immediately ordered more stuff from him).

Zachary | June 5, 2023

A fantastic module at a fantastic price

For MIDI8d - 8 Digital Outputs

Because you can buy pre-placed SMT components the build is so simple. In the end this build probably cost $25 or $30 max which is a steal when you look at other midi to gate modules out there.

Thanks for the great products!

Zachary | June 5, 2023

Great way to learn the fundamentals

This module is super simple for a vco and doesn't add anything unnecessary or extra. Its just a saw wave, which is all you really need in most cases. The pcb is beautiful and each component is outlined on the pcb which makes it very clear and easy to figure out what component goes where. The blog articles are also cool and go deep into the theory behind it.

Also ships faster than anyone else I've bought from on the platform.

Maxine | April 8, 2023

well made idiot proof and fully functional

These are some of the best kits I have built I was able to mod the kits to my specific needs, communications with the seller was great , thank you very much

Tim | Dec. 6, 2022

UC Clock Divider

For UC Clock Divider

Pcb/Panel set of good quality, fast shipping and good documentation online.
Highly recommended DIY project. Thanks alot.

Tim | Dec. 6, 2022

Midi8d

For MIDI8d - 8 Digital Outputs

Pcb/Panel set of good quality, fast shipping and good documentation online.
Highly recommended DIY project. Thanks alot.

Daniele | Nov. 25, 2022

weel designed

Nicely designed product, the board space is well optimised and heat managing is taken in consideration.

Steven | Aug. 19, 2022

Sounds great and an excellent project for a beginner

This is the first electronic project I've built and although it took me a long time (because I was being super-careful) everything went together nicely and it worked first time. The build documentation is excellent although the calibration procedure took a while just because I found it quite counter intuitive - if the sound is flat or sharp, make it worse - but it works although it takes a few iterations.

But now that I know what to do I'll be making another. I bought enough spare parts and two of these stacked will sound awesome.

Alexander | Nov. 22, 2021

Nice for simple projects

For Eurorack Stripboard PCB

I used this to build the Elliot Sound Products digital noise generator. There's *just* enough room on the board for it. I made use of some surface mount parts on the backside to make it fit. Having only five control/jack mounting spots is limiting, since the typical 'gate', 'cv', and 'output' jacks leave you with only two pots. I'd like to see a version which gets rid of the between-pot holes and fits in another two pot/jack spaces. With seven spots, you could do more complex projects.
A surface-mount-only version might be useful. Have a chip mounting area in the center with SOIC spacing for leads, and have the rest be pads for 0603 and 0805 parts. The reality is it is getting harder and harder to source through-hole parts.

Thomas | Nov. 10, 2021

Top Product. Mini Dual Power Supply

For Mini Dual Power Supply

Hello David,
I have just rated your products. :-)
Thank you for the fast delivery and the top quality of the PCBs.

PS .: Thank you for a few free small PCBs were included ... :-)

Many greetings
Thomas Effendy
Musikandmore.net

Thomas | Nov. 10, 2021

Very good Product Eurorack Compact Power Bus

For Eurorack Compact Power Bus

Thomas | Nov. 10, 2021

3to1 – Precision adder very good Product

For 3to1 – Precision adder

Hello David,
I have just rated your products. :-)
Thank you for the fast delivery and the top quality of the PCBs.
Where do you have the front panels manufactured? I like the look :-)

PS .: When ordering from July 4th, 2021 a few free small PCBs were included ... Thank you for that :-)

Many greetings
Thomas Effendy
Musikandmore.net

Sören | Oct. 16, 2021

Compact High Quality Eurorack Bus Board

For Eurorack Power Bus - 26

In my search for a Eurorack bus board, I happened to discover David's blog, which I highly recommend. David documented in detail the development and background of the Power Bus series. The Power Bus 26 is exactly what I was looking for: compact, many connections, well designed and high quality manufacturing. I use the Power Bus 26 in my DIY case and am very satisfied and happy with the bus. I'm interested in buying another assembled board. Thank you very much David!

David | Oct. 11, 2021

Really simple and effective LFO !

I give a review a year later, so I can confirm this module is really good !
I use it almost every time I play with my synth !

I can only recommand !

Eugene | Sept. 26, 2021

Great

Very stable VCO. Easy to assembly and cheap in parts. Awesome! Make sure you get proper transistors and TEMPCO.

Martin | June 21, 2021

Works perfectly

For Eurorack Power Bus - 14

Works beautifully. Not much else to say. Since a review needs to be at least a 100 characters, I’ve added this filler text :-)

Taylor | May 20, 2021

Great busboard for Eurorack format

I highly recommend these bus boards!!!
Very helpful seller as well.
The seller directed me to a really great synth DIY Discord server which I really appreciate.
You can use a higher amperage linear regulator than 1.5a. With a 2a regulator I also used a big TO-220 heat sink mounted on the bottom with thermal compound in between all three layers. A good linear thermal gradient is apparent with this heat sink.

Buy these bus boards!
They are robust and well designed, and pack a large number of 16 pin connectors in a very tight arrangement.

Herman | May 6, 2021

Great and secure Power Supply

For Eurorack Power Supply 15W+15W

Simple but great working Power supply. Looks good and feels sturdy.
It is a switching power supply. Distortion is minimal,... round 10 mVpp and frequenties are far above audio range. So no problem.
Very easy to build this kit even for beginners.
Kit isn't (imo) very cheap but worth the money.

Kalle | May 5, 2021

Delivers the simple bleeb bloobs

Cheap 1v/oct oscillator is rare. This is easy kit for basic module for beginner. The low price gives you chance to build row of 10 if you wanna drone your way. My only trouble was sourcing some components. Potentimeters used in the module are not that common in Finland. So I had to modify another type of pot.

Response from Electronic things... and stuff | May 5, 2021

Thank you for your feedback!

The potentiometers are the regular 9mm "Alpha" Right angle/PCB mount.
They are the *de-facto* standard in all Eurorack Modules nowadays.

You can find them in numerous places on Internet: Thonk, Synthcube, Musikding, Smallbear Elec, Mouser, Tayda, etc...

https://www.thonk.co.uk/shop/alpha-9mm-pots/
https://synthcube.com/cart/synth-diy/parts/potentiometers/alpha-9mm-round-shaft-pc-mount-pots
https://www.musikding.de/Potentiometer-9mm_1
https://www.mouser.com/Search/Refine?Keyword=rd901f
https://www.taydaelectronics.com/potentiometer-variable-resistors/rotary-potentiometer/linear.html

There are many compatible brands (BI/TT, Alps, etc).

And if the value you're looking for isn't available, you can use other values as well, as long as the circuit can tolerate that change. As a matter of fact, many volume/voltage divider circuits are insensitive to the absolute ohm's value. In these circuits, only the ratio matters.
For instance, if you can't find R2 (100k), you can substitute it with a 10k ohm potentiometer. But in this case you must also modify R1 and R3 values: if R2 value has been divided by 10, then R1 and R3 values must also be divided by 10: 1k ohm each.

Have fun!

Daryll | April 10, 2021

perfect for what it does

If you dont want/need CV control , then this is the LFO for you , small , neat , with easy to find components ( if you like DIY) , lends its self to the 5U format , because of the choice of pots ( 9mm or 16mm) , I have nothing but praise for this excellent product , fully complements the simple VCO

Daryll | March 8, 2021

does exactly what is says

For Eurorack Power Bus - 14

I needed a euro power bus for my modular synth , I also have a +-15 volt supply as well , yes a right old mixture , the euro power bus was easy to solder up , good documentation mean the parts were well marked , I didn't need the 5v option , so a quick word with David , he showed me what components to leave out , as the title says , it does exactly what is says , delivering +-12v to my modules , very well made PCB , I look forward to seeing what David comes up with next..

Daryll | March 8, 2021

Superb VCO

Ok , so its a bare minimum VCO , but that does not distract from the Quality , it took about a hour to solder up , plugged it in , worked first time , calibration was easy
Coupled with the LFO , we have a cheap , but excellent VCO , with modulation from the LFO , what more can you ask for , parts count is low , with easy to obtain parts , you could build several of these as a base of a monster synth , and it wont cost the earth , all together a very useful project , and a must have VCO

Response from Electronic things... and stuff | May 5, 2021

Thank you Daryll for your kind words and your support!
I wish you a lot of fun!

Tilman | March 6, 2021

Great little PSU! Easy to assemble with the proper tools

For Eurorack Power Supply 15W+15W

This is a great kit! It was easy and fun to build. I got it together with the 18 slot power bus for my first modular setup. If you want to solder this the right way, be sure to use a decent iron that can deliver enough power as there is a big groundplane and you want to put down the components quick enough without baking everything.

Thanks a lot!

Tilman | March 6, 2021

Great product!