wavebubble:errata
Differences
This shows you the differences between two versions of the page.
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wavebubble:errata [2007/11/26 16:29] bushing |
wavebubble:errata [2016/01/28 18:05] |
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| - | Unfortunately, there are many errors or discrepancies between the various resources available for this project. Eventually, they will all be listed here; if you can then update one of the resources (schematic, PCB layout, assembly directions), please do so and then remove the error from this list. | ||
| - | ===== Forum threads: ===== | ||
| - | (extract info from thread, place on this page and remove thread from list:) | ||
| - | |||
| - | * http://www.ladyada.net/forums/viewtopic.php?t=3409 | ||
| - | * http://www.ladyada.net/forums/viewtopic.php?t=3225 | ||
| - | * http://www.ladyada.net/forums/viewtopic.php?t=3179 | ||
| - | |||
| - | ===== Part changes: ===== | ||
| - | ==== Battery board ==== | ||
| - | Omit parts R3, R4, R5 and Q2 on the LiPoly board; they are only needed to charge the battery if it falls below 3.7v, which it should not do. | ||
| - | |||
| - | ==== Main (radio) board ==== | ||
| - | |||
| - | ^ Part ^ Incorrect ^ Correct ^ Remarks ^ | ||
| - | | C20 | 160pF, do not place | 390-550pF, placement recommended. | | ||
| - | | C36 | .47uF | do not place | part of (unused) noise circuit; do not place | | ||
| - | | C40 | 68pF | ? | Sirenza datasheets say 1-2pF, not clear if this is an error or not | | ||
| - | | C50 | ? | 1 uF 1206 | | ||
| - | | C51 | ? | .1 uF 1206 | | ||
| - | | C52 | ? | 1 uF 1206 | | ||
| - | | C53 | ? | .1 uF 1206 | | ||
| - | | C63 | ? | 1pF 0603 | | ||
| - | | C77 | ? | 4.7uF or 1uF, 0603 | Power supply filter cap; 4.7uF part is difficult to get in 0603, 1uF is ok | | ||
| - | | C80 | 20pF | 22pF | Substitute to save money by combining order with other 22pF caps | | ||
| - | | C81 | 20pF | 22pF | Substitute to save money by combining order with other 22pF caps | | ||
| - | | C83 | ? | .1uF ? | not listed in instructions | | ||
| - | | C84 | ? | .1uF ? | not listed in instructions | | ||
| - | | D4 | 1N5235 | do not place | part of (unused) noise circuit; do not place | | ||
| - | | IC2 | LM2733X | LM2731Y | Either part will work, but the 33X is not recommended for supplies less than 16v | | ||
| - | | L1 | 15 uH | 7.3 uH | Only change if using LM2731Y | | ||
| - | | L5 | ? | 1K resistor | | ||
| - | | L6 | ? | 1K resistor | | ||
| - | | R1 | 510K | ? | Pick a low-voltage point (e.g. 3.7v) -- this voltage divider should | | ||
| - | | R2 | 220K | ? | should output 1.1v at that point. Not currently implemented in firmware. | | ||
| - | | R3 | ? | 39K | | ||
| - | | R4 | ? | 12K | | ||
| - | | R8 | ? | do not place | not usually necessary | | ||
| - | | R9 | ? | do not place | not usually necessary | | ||
| - | | R12 | ? | 100 ohms | not a critical value (instructions say 68 ohms) | | ||
| - | | R13 | 100K | 63K | Value may vary to adjust VCO DC Offset gain | | ||
| - | | R15 | 100K | 33K | Value may vary to adjust VCO DC Offset gain | | ||
| - | | R19 | 2K | do not place | part of (unused) noise circuit; do not place | | ||
| - | | R27 | 0 ohms | ferrite bead | | ||
| - | | R28 | 0 ohms | ferrite bead | | ||
| - | | R90 | 100K | do not place | part of (unused) noise circuit; do not place | | ||
| - | |||
| - | ===== Misc ===== | ||
| - | The silkscreened part numbers for the tiled Gerbers are incorrect; see http://www.ladyada.net/forums/viewtopic.php?t=4143 for more info. | ||
/home/ladyada/public_html/wiki/data/pages/wavebubble/errata.txt · Last modified: 2016/01/28 18:05 (external edit)
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