mirror of
git://projects.qi-hardware.com/antorcha.git
synced 2024-11-01 15:11:52 +02:00
29 lines
1.3 KiB
Plaintext
29 lines
1.3 KiB
Plaintext
|
- 4.5 V rail was intended to provide the ADXL32x with a supply voltage
|
||
|
|
that's at a safe distance from its 2.4 V minimum. However, the current
|
||
|
|
circuit wouldn't work with the acceleration sensor operating at 4.5 V.
|
||
|
|
It turns out the system operates well enough with the 4.5 V rail joined
|
||
|
|
to the 3 V rail.
|
||
|
|
|
||
|
|
- the 6 V rail drops to 5 V after relatively little use. Need to improve
|
||
|
|
the power supply.
|
||
|
|
|
||
|
|
- connections between boards are sensitive to mechanical forces and break
|
||
|
|
easily in the high-g environment we have here. Should consider moving
|
||
|
|
to an FPC at least for the LEDs. A stiff support beam (e.g., an
|
||
|
|
aluminium rail) helps to reduce mechanical stress.
|
||
|
|
|
||
|
|
- the vertical resolution is a bit coarse. We could improve it and make
|
||
|
|
the whole system simpler by adding local demultiplexing with 74HC594
|
||
|
|
or 75HC595. Such chips could drive the LEDs directly.
|
||
|
|
|
||
|
|
- the battery pack needs room for a plug. (The original design assumed
|
||
|
|
the battery pack would be mounted on the stick, but this now seems
|
||
|
|
undesirable, due to the large weight. Current stick weight is about
|
||
|
|
120 g and each AA battery would add about 25 g.)
|
||
|
|
|
||
|
|
- the system really ought to have a button or even a joystick for user
|
||
|
|
input.
|
||
|
|
|
||
|
|
- once a button is added, we could have local-only operation with images
|
||
|
|
coming from Flash.
|