Eurorack DIY: 909 Crash and Ride cymbals

[@mellow1504]

Great Work! I always look forward to your new videos. I learn a lot from this and it inspires me to make my own modules. I'm already curious about your new projects.

[@MeeBilt]

Thank you very much - I'm happy to hear that you find the videos useful. 😊 I'm about to build a second Erica Synths Bassline DIY and I'm finishing up the Pico Quantizer project. So that is my projects in the near future.... Oh, and I need to build a bigger case.... 😅

[@mymodularjourney]

Excellent explanation of the circuit implementation. As always. 💪

[@MeeBilt]

Thanks!

[@danieleden1856]

Awesome video as usual!

[@MeeBilt]

Thank you very much!

[@DemMusel]

great video and something i'm very interested to build myself . would love a double module with 909 high hats

[@MeeBilt]

Thanks a lot! Yeah, I love the 909 Hihat, it's a great 909 sound

[@caldarion2506]

very cool!

[@MeeBilt]

Thanks!

[@royvandam]

Nice work! I was wondering what version/type of the Andonstar microscope do you have? There seem to be several, all in all it looks like a relative affordable but great tool to have

[@MeeBilt]

Thanks! Forgot to mention that in the video: it's the Andonstar AD407

[@cesarvenegas2308]

Great video, a question about soldering, what solder paste do you use?

[@MeeBilt]

I use a solderpaste with a melting point around 183 degrees C. I don't know the brand (it's chinese)

[@cesarvenegas2308]

@@MeeBilt thank you so much!

[@bastenhoor6902]

Around 14:40 you assemble the module using two metal tools. 1 for the bolts of the pots and 1 for the bolts/knurls of the jack sockets. I've been looking for them for a long time. Can you share where you got them? Thanks!!!

[@MeeBilt]

The hex nut on the pots fits a standard 10mm hexagon socket that you can find in any tool/hardware store. The tool for the knurled nuts were bought at Thonk (www.thonk.co.uk/shop/thonk-knurled-nut-driver/)

[@finns7043]

Great Work! I ordered all the components and give it a try. I hope everything works. What eeprom Programmer do you use?

[@al_lazy3519]

The programmer looks like an xgecu, not sure about the precise model

[@MeeBilt]

Thanks for answering; it's the Xgecu T-48

[@AnalogDude_]

This Sallen key config uses a lot off "idle" current if you configure that in Falstad and look at in detail, using the transistors was obviously cheaper for Roland than using a Mitsubishi m5218a (witch i also have and use in my eurorack modules) in the 80ties. a idle tl-072 uses 2 mA according other Tuber. imaging having a car part in your modular synth. Very clever circuit. What dual match transistor did you take? Cool, using the 512 variant. I made a Console C++ application, i can do anything with these files or create them on the fly, you can also draw a sine wave with math formula. I have designed a eprom burner pcb, but not yet ... probably best to make a second skiff for these modules, with mixer and diy drum computer core using the 74hc174 dac's, but there is also a very good 8 bit Ti solution witch also can be configured as bi-polar in SOT-23.

[@MeeBilt]

Yeah, the transistor-based SK filter is really cool, very compact and cost effective solution. I didn't match the current mirror transistor-pair, it's just standard BC859C SOT-23 parts.

[@AnalogDude_]

@@MeeBilt why not BCM859 (SOT-23-6)? or NSS40300MDR2G (pnp, Soic 8). NSS40301MDR2G npn, NSS40302PDR2G npn/pnp. I got the original tr-909, tb-303 transistors, including the matched.

[@dtharmo]

What a big one ! Huge success, beautiful results as usual. I'm curious about the total kit price, just to compare a full diy version with commercial modules complete kit 😮

[@MeeBilt]

Thanks a lot! At some point I will review all of my 909 designs and redesign parts of them to make them easier to turn into kits. I don't have any figures what these modules would cost to "massproduce" at this current state, but the cost is quite high I think. They will probably end up in the same range as some of the TipTop Audio 909 modules.