pad_4_4
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pad_4_4 [2016/08/10 22:46] – [Assembly] latigid_on | pad_4_4 [2018/03/05 22:57] (current) – [Assembly] latigid_on | ||
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- | ===== BOM v1.2 ===== | + | ===== BOM v1.1 ===== |
^Type | ^Type | ||
Line 38: | Line 38: | ||
| |16|WS2812B|5mm|programmable LEDs| | | |16|WS2812B|5mm|programmable LEDs| | ||
^headers^ | ^headers^ | ||
- | | |4| |2*5 (shrouded) SMT|J2-5| | + | | |4| |2*5 (shrouded) SMT|J2-5|can use DIL 100mil breakaway header strips| |
| |1| |1X03_SMALL|J1| can use Molex 22-23-2031| | | |1| |1X03_SMALL|J1| can use Molex 22-23-2031| | ||
^switches^ | ^switches^ | ||
Line 49: | Line 49: | ||
===== Versions ===== | ===== Versions ===== | ||
- | v1.1: current release. Some traces moved around, grounding error fixed. J1 power header changed to offset pads so an SMT header | + | v1.1: current release. Some traces moved around, grounding error fixed. J1 power header changed to offset pads so an SMT pinheader |
v1.0: errata: J4 and J5 have no connection to ground. J1-3 do carry ground, so it isn't a problem if the DIN/DOUT modules share the same power rail. | v1.0: errata: J4 and J5 have no connection to ground. J1-3 do carry ground, so it isn't a problem if the DIN/DOUT modules share the same power rail. | ||
===== Assembly ===== | ===== Assembly ===== | ||
- | In order to keep the button pad flat, it's best to solder all components on the rear of the board i.e. opposite the pads. The contacts are exposed ENIG, so try not to damage the surface by scratching or splashing solder/flux on them.\\ | + | To keep the button pad flat, it's best to solder all components on the rear of the board i.e. opposite the pads. The contacts are exposed ENIG, so try not to damage the surface by scratching or splashing solder/flux on them.\\ |
Start by tinning one pad (preferably not the pad joined to the ground plane with thermals) of each 1206 capacitor, making a " | Start by tinning one pad (preferably not the pad joined to the ground plane with thermals) of each 1206 capacitor, making a " | ||
- | The best way to fix the 1N4148 diodes is to place the parts then solder **from the same side** | + | The best way to fix the 1N4148 diodes is to place the parts then solder **from the same side** |
- | If using shrouded headers, ensure | + | Check that the pinout of your pLEDs matches with the board i.e. serial in on the rounded |
- | ==== Resistors ==== | + | |
- | * four 30k resistors marked in pink | + | If using shrouded headers, ensure the notch points out on the same side as the pin 1 designator. |
- | * remainder are 49k9 | + | |
- | * for best results, match R1/R2, R7/R8 (and so on), and R4/R5/R6, R10/R11/R12 (and so on). | + | |
- | * the value is less important than the minimum deviation. | + | |
- | {{: | ||
- | ==== Capacitors | + | ==== Interconnections |
- | * four 10p as marked in pink | + | * J2 normally connects to Core J4B (I2C) |
- | * electrolytics in yellow | + | * J3 carries the WS2812B chain for additional modules |
- | * blue are optional (i.e. probably unnecessary) | + | * J4 connects to a DIN header |
- | * remainder are 100n. | + | * J5 connects to a DOUT header |
- | {{: | + | |
- | ==== Power ==== | ||
- | * J2 is a standard Eurorack header | + | ===== License |
- | * red = -12V | + | |
- | * blue = +12V | + | |
- | * green = 0V(ground) | + | |
- | * for Core power, bridge the solder jumper marked in yellow | + | |
- | * otherwise install the Vreg circuit in pink | + | |
- | * **IMPORTANT** only choose one of these 3v3 power options! Don't install the regulator if the solder jumper is bridged. | + | |
- | + | ||
- | {{: | + | |
- | + | ||
- | ==== Headers ==== | + | |
- | + | ||
- | For connection to a [[Control Board]], use pin headers placed on the opposite side as the rest of the components i.e. follow the silkscreen markings. For standalone use, you probably want header pins (or sockets, or even bare wires if you wish) on the same side as the remaining circuitry. | + | |
- | + | ||
- | ---- | + | |
- | + | ||
- | + | ||
- | ==== Standalone use ==== | + | |
- | + | ||
- | For simplest results, use the complementary [[Control Board]]. Otherwise see below for header functions. | + | |
- | + | ||
- | + | ||
- | === Five pin header === | + | |
- | + | ||
- | * IN = CV input | + | |
- | * for scaling bipolar CVs, connect or switch into OFFSET (e.g. +5V; n.b. the offset should be referenced to the common 0V) | + | |
- | * for 0-5V operation, leave SWITCH open; for 0-10V operation, jumper or switch in COMMON to POLE | + | |
- | + | ||
- | {{: | + | |
- | + | ||
- | + | ||
- | + | ||
- | + | ||
- | === Three pin header === | + | |
- | + | ||
- | * with a 100k pot facing you, solder the left leg to 0V(ground) | + | |
- | * centre to WIPER | + | |
- | * right to LEG | + | |
- | * WIPER and LEG may be jumpered if pots aren't desired, but it is quite useful to have an attenuator to trim down variable CVs or even clip the second op amp for crunchy waveforms! | + | |
- | + | ||
- | {{: | + | |
- | ---- | + | |
- | + | ||
- | ==== Interconnection to Core ==== | + | |
- | + | ||
- | J1 carries the scaled CV to J5A or J5B of an STM32F4 Core module. | + | |
- | ---- | + | |
- | + | ||
- | + | ||
- | + | ||
- | ==== License | + | |
Currently the design is (c) 2016 antilog devices with all rights reserved; all documentation is CC BY-NC-SA 3.0. | Currently the design is (c) 2016 antilog devices with all rights reserved; all documentation is CC BY-NC-SA 3.0. |
pad_4_4.1470869185.txt.gz · Last modified: 2016/08/10 22:46 by latigid_on