... | ... | @@ -51,5 +51,41 @@ Additionally you will need a Kaltgerätekabel/powerchord which you probably have |
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### 5. Powersmoothing
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To avoid hum and ripple on the powersupply it makes sense to load it with something which has a growing resistance with a rising temperature. Oldschool tungsten light bulbs proofed to work here (and as a sight effect you have a light inside your case). [The bulb](https://www.reichelt.de/E14-E10-E5-5-Sockel/L-3450/3/index.html?ACTION=3&LA=20&GROUP=A561&GROUPID=3048&ARTICLE=9676&START=0&SORT=preis&OFFSET=100) costs 0,50 Euros at reichelt and [the fitting E10 socket](https://www.reichelt.de/Fassungen/FASSUNG-F12/3/index.html?ACTION=3&LA=20&GROUP=A569&GROUPID=3056&ARTICLE=7527&START=0&SORT=preis&OFFSET=100) costs 0,31 Euros.
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### 6. Cables
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You will need plenty cables. |
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Ideally you get more than one bulb per person, so you have spare ones in case it breaks (try buying a E10 6V bulb in stress on the evening of your gig – you will fail).
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### 6. Wiring
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**Warning: if you have no experience with electricity do not do stupid stuff on your own, ask professionals!**
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To connect your powerplug to the powersupply you will need 3 wires (dangerous 230V AC, Neutral (but still dangerous!) and protective earth (PE). On one side of the wire you need to add a isolated flat connector sleve ("Flachsteckerhülse"). The other ends can be drilled and fixed to the powersupply. Ideally you get those flat connector sleves in three different colors (e.g red, blue, yellow) so you know what cable is what and avoid dying of young age. The wires can be recycled from scrap wires at Computerei.
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![flat_con_sleeve](/uploads/920a6d4c0175f36f824fe3db74ab7c59/flat_con_sleeve.png)
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The powersupply takes the 230V AC from the powergrid and converts this deadly voltage down to 4 voltage levels by dark magic. These resulting voltage levels are all DC: **+12V, -12V, 5V, and Ground/0V**. Ideally you would like to have a **star topology** which means: everything that is connected to each of these voltages meets at **one point**. This point are usually the powersupply's outlets.
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You need two cables from powersupply to the bulb's socket (one from GND and one from 5V). One side drilled, one with flat socket connectors.
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The next connection between powersupply and busboards. Four wires each from the powersupply to each busboard/row (+12V, -12V, Ground/0V and 5V). One side drilled, one with flat socket connectors.
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### 7. Wood/Case
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The case itself will house all the stuff mentioned before. They come in many, many shapes:
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![WOOD_9U_SYNTHROTEK_EURORACK_CASE_POWER_FRONTAL](/uploads/d353b3c2535edae9ae17726d30ff050d/WOOD_9U_SYNTHROTEK_EURORACK_CASE_POWER_FRONTAL.jpg)
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![Deadbox](/uploads/017c692c207b68c739f7ea9cbf48a9d1/Deadbox.jpg)
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![R0016962](/uploads/ea75a5dbc97039609b6120c169dd3351/R0016962.jpg)
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![4U-cases-group-shot-web](/uploads/3825fe0631144aba70d4dd6d4f077fdd/4U-cases-group-shot-web.png)
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![Structure270-large](/uploads/f8041695d515ca42e07c1a960c98aa31/Structure270-large.jpg)
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![syr-e84_5_gal](/uploads/b5e1411ed0f96e2306b7df53095ff120/syr-e84_5_gal.jpg)
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![waterproof-003_fixed](/uploads/c168bfafec3965874f67ebe52e725c57/waterproof-003_fixed.jpg)
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There are common things however:
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- The inside depth of the case should be 8cm **minimum**. Keep in mind: powersupply and busboard with everything plugged in (flat socket connectors etc) take away from that depth.
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- the inside width should fit your rail's length. In our case: 431,8mm plus some space to allow the rails to fit if your wood isn't cut accurately.
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- The inside height should be the outside height of the rails (133 mm)
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- You need to have space for the powersupply (129 x 98 x 38 mm)
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- You need space for the bulb, the busboards and the power plug
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Other design considerations:
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- will you keep the thing at home or is it for the road? Will you put something on top of it (loudspeaker, other box, ...)?
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- If you make a case that folds or has a lid: will you be able to close the case with cables patched in?
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- how will you use it? Sitting? Standing?
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For material, the cheapest while most stable and lightweight option is birch multiplex. downside of birch multiplex is, that you will not be able to easily paint it. |
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