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alf45tar / PedalinoMini

Wireless and Bluetooth MIDI Foot Controller
GNU General Public License v3.0
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Chip resistors #376

Closed bobvc133 closed 1 year ago

bobvc133 commented 1 year ago

Can the 1/4W resistor in the schematic be replaced with a chip resistor in a 0603 package? This saves board space

alf45tar commented 1 year ago

No experience with 0603 resistor but it looks like they are 1/10W. They are ok for 10K pull-up resistors but not for 220 ohm used in MIDI because they consume 0,11W max.

smadds commented 1 year ago

1/10W should be fine, as this is not a continuous 5V DC. Actual power is likely to be about half of the max

alf45tar commented 1 year ago

I agree it can works but to be safe it is better to use 2 resistors because when the UART signal is idle, it sits at a logic high state. The value of the 2 resistors should be 1/2 if connected in serie or 2x if connected in parallel.

bobvc133 commented 1 year ago

There should be no problem using a 1/4W 1206 resistor, the volume is slightly larger

alf45tar commented 1 year ago

1/4W resistor are fine.