wavebubble:errata
Table of Contents
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.
Note: This errata does not apply to the WB 2010 design by Mictronics found here: http://ladyada.net/wiki/wavebubble/wave_bubble_2010
Part changes:
Battery board
| Part | Incorrect | Correct | Remarks |
|---|---|---|---|
| R2 | 2K, 0.25W | 500-1000 ohm | The lower the resistance, the brighter the power LED – can be any wattage |
| R3 | ? | do not place | unused |
| R4 | ? | do not place | unused |
| R5 | ? | do not place | unused |
| Q2 | ? | do not place | unused |
| D1 | ? | SS14 | |
| J2 | optional | If you omit this part, you have to jumper two pads together or else you won't get power from the USB port |
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 | |
| C62 | 0pF | do not place | |
| 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 | .1uF ? | on top/parallel R41 |
| C84 | .1uF | .1uF ? | on top/parallel R43 |
| D1 | 1N5817 | SS14 | |
| D2 | 1N5817 | SS14 | |
| D3 | 1N5817 | SS14 | |
| D4 | 1N5235 | do not place | part of (unused) noise circuit; do not place |
| D5 | 1N5817 | SS14 | optional |
| D6 | 1N5817 | SS14 | optional |
| 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 | |
| R31 | 0 ohms | do not place | |
| 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)
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
