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Isolate power and audio circuitry in the MEMS board.
#61
Preetisar
closed
6 years ago
0
Font on the silk screen too big for some components and are overlapping with each other on the MEMS board.
#60
Preetisar
closed
6 years ago
0
Label the MEMS board with its revision level
#59
Preetisar
closed
6 years ago
0
LDO should be further away from the USB port in the MEMS board
#58
Preetisar
closed
6 years ago
0
Vias should be far apart in the MEMS board
#57
Preetisar
closed
6 years ago
0
LEDs should be facing the other side in the MEMS board.
#56
Preetisar
closed
6 years ago
0
LEDs and switch should be facing the other side in mixer board.
#55
Preetisar
opened
6 years ago
0
50K dial POTS are facing the wrong side in the mixer board.
#54
Preetisar
opened
6 years ago
0
Change 10K resistors to 1K resistors in mixer board
#53
Preetisar
closed
6 years ago
0
Circular outline around C16 in mems board not showing up on the PCB
#52
Preetisar
closed
6 years ago
1
Put labels for Battery + and - in mems board the same way as in v8
#51
Preetisar
opened
6 years ago
2
Change labels of 1st and 2nd stage amplification
#50
Preetisar
closed
6 years ago
0
Change all 10 uF tantalum caps in the audio circuitry to electrolytic caps
#49
Preetisar
closed
6 years ago
0
Mixer board is flipped. Turn it the other way round.
#48
Preetisar
opened
6 years ago
2
Change 5K resistor to 4.7K
#47
Preetisar
closed
6 years ago
1
Please change opamp from TL072 to opa1642
#46
Preetisar
closed
6 years ago
1
Change 50K resistor to 47K resistor
#45
Preetisar
closed
6 years ago
1
Change the holes of the potentiometer
#44
Preetisar
opened
6 years ago
5
Add a 100 uH inductor and 0.1uF capacitor similar to piezo and mems board
#43
Preetisar
closed
6 years ago
2
Trace from diode D2 to V+ is incorrectly labeled as VUSB.
#42
Preetisar
closed
6 years ago
4
Please remove the label 10BQ015 from the diode in the step up circuit
#41
Preetisar
closed
6 years ago
4
Please name resistors sequentially for both piezo and MEMS boards
#40
Preetisar
closed
6 years ago
1
Change power circuitry part of mixer board to same as piezo
#39
Preetisar
closed
6 years ago
5
Increase size of 2.7 uH inductor to previous version
#38
Preetisar
closed
6 years ago
5
Connect the input of the voltage divider circuit to pin 8 of the opamp
#37
Preetisar
closed
6 years ago
1
poor placement of parts
#36
batchku
closed
6 years ago
1
Change charging circuit of MEMS to same as piezo board
#35
Preetisar
closed
6 years ago
1
Change opamp from OPA 1642 to TL072 in the piezo preamp board.
#34
Preetisar
closed
6 years ago
2
Make changes to the input 12V line of the MEMS board
#33
Preetisar
closed
6 years ago
3
Change resistor R5 to 2.2K
#32
Preetisar
closed
6 years ago
1
Increase size of 100 uH inductor L1
#31
Preetisar
closed
6 years ago
1
Missing 10uF tantalum capacitor between AC output of the ICS40300 breakout and resistor R13
#30
Preetisar
closed
6 years ago
5
Pins of the POT in the MEMS board are wired incorrectly.
#29
Preetisar
closed
6 years ago
1
Move IC6 (step down) to power side of board
#28
jakezimmer
closed
6 years ago
0
Change L2 Inductor Package to 1008
#27
batchku
closed
6 years ago
1
Piezo preamp silk screen is a MESS
#26
batchku
closed
6 years ago
1
USB +5V is incorrectly connected to "V+" signal
#25
batchku
closed
6 years ago
3
Wrong connections for Headset and Phone TRRS connectors
#24
Preetisar
closed
6 years ago
0
potentiometer device has wrong symbol, device name, package name
#23
batchku
closed
6 years ago
1
Switches are not labeled well on the Piezo and MEMS board
#22
Preetisar
closed
6 years ago
3
Change resistor values of R20 and R21 in voltage regulation step-down
#21
Preetisar
closed
6 years ago
3
Change size of diode D2 in voltage regulation step-up circuit
#20
Preetisar
closed
6 years ago
1
Change size of inductor L2 in voltage regulation step up circuit
#19
Preetisar
closed
6 years ago
4
DPDT switch connected wrongly in the piezo board
#18
Preetisar
closed
6 years ago
1
Difference in connection between Buffer Stage 1 and Op-Amp amplifier for the old and new piezo preamp boards
#17
Preetisar
closed
6 years ago
5
In the MEMS board, Vin of ICS30400 is connected to the 12 V line, instead it should have 4V input
#16
Preetisar
closed
6 years ago
0
Pin 2 of SC4503 is not grounded in the MEMS board
#15
Preetisar
closed
6 years ago
1
Size of hole for the side pin of 50K dial POT in Piezo board too small
#14
Preetisar
closed
6 years ago
4
Size of the footprint for the 100 uF cap is small
#13
Preetisar
closed
6 years ago
3
Reduce size of the footprints of the 100uH inductor L1 on the piezo preamp board
#12
Preetisar
closed
6 years ago
0
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