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ideaHex / FHTbot

Firmware for Makerfaire robot
Apache License 2.0
10 stars 7 forks source link

PCB update #62

Open ideaHex opened 7 years ago

ideaHex commented 7 years ago

Update the PCB. Improvements should include: Allow robot to run from higher voltage minimum 4 AA batteries Measure battery voltage in place of temperature Allow safe connection of USB without turning off battery pack

ideaHex commented 7 years ago

Should we stick with D1 mini or update to D1 mini Pro

D1 Mini 4M Flash, CH340G USB 2 Uart chip, $5.42ea D1 Mini Pro 16M flash, CP2104 USB 2 Uart chip, $6.77ea

They are both the same size and are based on the ESP8266EX so perhaps they would be interchangeable.

ideaHex commented 7 years ago

Should we stick with a combination through hole and surface mount or just through hole?

TildenG commented 7 years ago

Does the D1 Mini Pro have an antenna on board, the version I looked at only had an antenna jack, and didn't mention how the flash memory was laid out ? 1MB program, 15MB SPIFFS ???. Extra flash memory is always nice.

TildenG commented 7 years ago

As far as through hole is concerned, its up to what the end user wants, if they want to reconfigure the bot, through hole all the way, or else surface mount.

ideaHex commented 7 years ago

D1 mini pro has built in ceramic antenna and option for external antennae.

TildenG commented 7 years ago

Currently the main program uses 290KB of the 1MB program memory, so plenty of room left there and about 790KB of the 3MB SPIFFS, so plenty of room there too.

ideaHex commented 7 years ago

Ok Will stick with D1 mini.

ideaHex commented 7 years ago

Forked FHTbot on Circuit maker Now FHTbot - V2.

ideaHex commented 7 years ago

Connect LEDs directly to batteries Use level converter from BSS138 MOSFET to drive signal Increase C1 & C2 Motor controller Decoupling Capacitors Add Capacitor after diode on 5V input to WEMOS