hw_boards.md

Periphery boards and pre-assembled units

This document describes ready-to-use PCBs which are widely available to apply in different hardware projects for different purposes.

USB-C DC power trigger

Description

switch	5V	9V	12V	15V	20V
S1	0	1	1	0	0
S2	0	0	1	1	1
S3	0	0	0	0	1

Notes

TBA

Applications

• USB-C-DC converter with configurable voltage

Mini DC-DC converter

Description

pin	info
VO+	output voltage
GND	common ground
IN+	input voltage
EN	enabled control

Notes

TBA

Applications

• DC-DC converter with configurable voltage

TTP223-based touch sensor (w/o I/O line)

Description

pin	info
12VDC -	power source -
12VDC +	power source +
LED -	power sink -
LED +	power sink +
S1	shorted latch
S2	shorted jog
C1	sens. capacitor

Notes

Information gathered from images & from descriptions on online markets:

• power source input: 6-28 V, (up to) 3 A;
• power sink should be equal to power source;
• shorted pads:
  • shorted latch means shorted S1: touch to open, touch again to close;
  • shorted jog means shorted S2: touch to open, release to close;
• C1 sensitivity adjustment capacitor (0-20 pF): the larger the capacity of C1, the lower the sensitivity of touch button area;
• standby consuption: 6 mA.

Applications

• touch-based power switch
• touch-based trigger for power relay