Shared Projects by Petezah

See https://github.com/Petezah/roomba_wall_v3

A virtual barrier for the Roomba, designed to daisy-chain around a Christmas tree

UNTESTED – but pretty sure it works. The only thing different from rev A is the updated SOIC-8 footprint.

A virtual barrier for the Roomba, designed to daisy-chain around a Christmas tree

VERIFIED – however, SOIC footprint is too small for ATTiny25/45/85. I had to bend the legs of the IC on one side to get it to make contact on both sides of the footprint.

Description

Prototype PCB layout for a pager unit designed to operate on an existing WiFi infrastructure. It has a number of features designed for possible future expansion, to meet whatever requirements may arise during testing.

• OLED screen (0.96" OLED display with FPC connector, from BuyDisplay.com)
• DRV2605L haptic motor driver (and SMT haptic motor)
• ATECC508A crypto-authentication device
• Four soft-touch buttons intented for user interface operation
• Two soft-touch buttons intended for development and testing purposes
• Reset button
• JST connector for a rechargeable LiPo battery
• Micro USB connector for battery charging

NB: The ZIF connector (J1) is reversed in rev. A and requires some kind of mitigation, or an OLED module whose pin 1 is on the left-hand side. My OLED module’s pin 30 is on the left; there may be others that are not like this.

Bill of Materials

** OLED-0.96W is 30 pin 0.5mm pitch ZIF connector (bottom contact) from BuyDisplay.com

Breakout for a VSSIP10 chip. NB: This is a very specific application, and pins 10 and 6 are actually connected for that reason. If you need pin 10 broken out separate, cut the trace at the top of the DIP footprint and solder a jumper from pin 10 on the VSSOP to pin 10 on the DIP. ALSO: there happens to be a via right under the dot on the silkscreen; so just pay attention to where the “U1” marker is when orienting the chip. :(