seqv4plus_le_mec
Differences
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seqv4plus_le_mec [2017/10/09 21:18] latigid_on [Versions] |
seqv4plus_le_mec [2017/11/20 18:05] latigid_on [BOM v1.0] |
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| ^Resistors^^^^^^^^^^ | ^Resistors^^^^^^^^^^ | ||
| | |1 |wire link |THT |R17 | | | | | | | | |1 |wire link |THT |R17 | | | | | | | ||
| - | | |18 |47R 5% |THT |RJ1-9 | | | | |see instructions | | + | | |16 |47R 5% |THT |RJ1-8 | | | | |see instructions | |
| - | | |8 |100-220R 5% |THT or 1206 |SJ1-8 | | | | |see instructions | | + | | |10 |100-220R 5% |THT or 1206 |SJ1-8, RJ9 | | | | |see instructions | |
| | |16 |1k 5% |THT |R1-16 | | | | | | | | |16 |1k 5% |THT |R1-16 | | | | | | | ||
| + | | |8 |10k 5% |1206 |R18-25 | | | | |near NPN transistors | | ||
| ^Resistor networks^^^^^^^^^^ | ^Resistor networks^^^^^^^^^^ | ||
| | |3 |9*10k |SIP10 |RN1-3 | | | | |bussed network, __not__ 5 pairs of resistors | | | |3 |9*10k |SIP10 |RN1-3 | | | | |bussed network, __not__ 5 pairs of resistors | | ||
| Line 26: | Line 27: | ||
| ^Diodes^^^^^^^^^^ | ^Diodes^^^^^^^^^^ | ||
| | |24 |1N4148 |THT | | | | | | | | | |24 |1N4148 |THT | | | | | | | | ||
| + | | |24 |BAT54|SOT-23 | |512-BAT54 |BAT 54 SMD | | |(for prototypes, stack on top of BC818 transistors | | ||
| ^LEDs^^^^^^^^^^ | ^LEDs^^^^^^^^^^ | ||
| | |16 |RGB flat |superflux | | | | |ELV: 68-10 94 64 |see instructions| | | |16 |RGB flat |superflux | | | | |ELV: 68-10 94 64 |see instructions| | ||
| Line 56: | Line 58: | ||
| ==== v1.0 ==== | ==== v1.0 ==== | ||
| - | The cathode row is missing a PCB trace. Join the two legs of SW19 as shown in pink, preferably on the bottom of the PCB. The LED cathode leg could simply be bent across to the switch pin. | + | The C3 cathode row is missing a PCB trace. Join the two legs of SW19 as shown in pink, preferably on the bottom of the PCB. The LED cathode leg could simply be bent across to the switch pin. |
| - | {{:seqv4plus:sinkbridge.png?nolink&400|}} | + | {{:seqv4plus:sinkbridge.png?nolink&800|}} |
| Ghosting. As seems common with these kinds of matrices, there is some unwanted lighting of LEDs. This is most apparent when trying to light up the bottom row of MEC switch LEDs, as the resistive path to the Superflux LED is lower and thus glows unintentionally. This can be overcome somewhat by stacking BAT54 Schottky diodes on top of the BC818 transistors. Later revisions will have more elegant mounting. | Ghosting. As seems common with these kinds of matrices, there is some unwanted lighting of LEDs. This is most apparent when trying to light up the bottom row of MEC switch LEDs, as the resistive path to the Superflux LED is lower and thus glows unintentionally. This can be overcome somewhat by stacking BAT54 Schottky diodes on top of the BC818 transistors. Later revisions will have more elegant mounting. | ||
seqv4plus_le_mec.txt · Last modified: 2018/12/18 09:35 by latigid_on
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