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This board holds the SEQ's illuminated buttons, which are driven from a shift register matrix. The ENC-PLATE board stacks on top.
A shift register chain of 3 DIN 74HC165 and 2 DOUT 74HC595 chips are used. Two of the DINs scan the encoders and one scans the button columns. The DOUT parts are connected into a matrix. Note that both the high and low sides have driver transistors (PNP and NPN, respectively). This means that the anode side of the matrix will operate with inverted behaviour (pin high = LED off).
There are special instructions for connecting the parts which are covered below.
Type | Qty | Value | Package | Parts | Mouser | Reichelt | Conrad | Other | Notes |
---|---|---|---|---|---|---|---|---|---|
Resistors | |||||||||
1 | wire link | THT | R17 | ||||||
18 | 47R 5% | THT | RJ1-9 | see instructions | |||||
8 | 100-220R 5% | THT or 1206 | SJ1-8 | see instructions | |||||
16 | 1k 5% | THT | R1-16 | ||||||
Resistor networks | |||||||||
3 | 9*10k | SIP10 | RN1-3 | bussed, not 5 pairs of resistors | |||||
Capacitors | |||||||||
5 | 100n | 1206 | C1-5 | ||||||
0 | do not fit | C6 | |||||||
Diodes | |||||||||
24 | 1N4148 | THT | |||||||
LEDs | |||||||||
16 | RGB flat | superflux | ELV: 68-10 94 64 | see instructions | |||||
8 | various | 3mm | insert into switches | ||||||
Transistors | |||||||||
8 | BC808 | PNP SO-23 | |||||||
8 | BC818 | NPN SO-23 | |||||||
ICs | |||||||||
3 | 74HC165 | SOIC16 | IC1, IC3, IC5 | 595-SN74HC165DR | |||||
2 | 74HC595 | SOIC16 | IC2, IC4 | ||||||
Switches | |||||||||
16 | Matias | QuietClick | SW1-16 | see notes | |||||
8 | MEC/APEM | 3FTH9 | SW17-24 | 642-3FTH9 | TASTER 3FTH9 | 705276 - 62 | |||
Headers | |||||||||
1 (3) | 1*3 | male | |||||||
3 | 1*10 | male | |||||||
2 | 2*5 | male | |||||||
Hardware | |||||||||
16 | switchcaps | ALPS-DSA clear | |||||||
8 | switchcaps | 22.5mm | 642-1S11-19.0 | 1S11-19.0 |
note that two sets are required per SEQv4+ build!
v1.0: first release.
Take your time as some of these parts require some patience.
High-brightness LEDs are often expensive or don't have viable mounting options. To get around this, we will use flat-top superflux/piranha RGB LEDs and bend the legs over to make a pseudo SMT part :). There are at least two different LED pinouts, so make sure you know how yours function.
Important is:
Currently the design is © 2017 antilog devices with all rights reserved; all documentation is CC BY-NC-SA 3.0.