Dcttech usbrelay
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 | |
| Status | supported |
|---|---|
| Source code | dcttech-usbrelay |
| Channels | up to 8 |
| Ratings | 10A 250VAC / 10A 30VDC |
| Connectivity | USB HID |
The dcttech.com USBRelay<n> is a USB relay card with up to 8 relays (models with 1, 2, 4, or 8 relays exist). The firmware is based on V-USB and presents itself as USB HID to the PC (so that no driver installation is required on Windows).
See Info for USB details.
Photos
USBRelay2 top, ATtiny45, discrete transistors
USBRelay2 bottom
USBRelay4 top, ATmega8A, ULN2803, external supply for relays
USBRelay4 bottom
USBRelay8, DIY with Nanite841 and ULN2803
Example use
Detect the device and display its properties.
$ sigrok-cli -d dcttech-usbrelay --scan The following devices were found: dcttech-usbrelay:conn=/dev/hidraw2 - www.dcttech.com USBRelay4 [S/N: 12345]
$ sigrok-cli -d dcttech-usbrelay --show
Driver functions:
Multiplexer
Scan options:
conn
dcttech-usbrelay:conn=/dev/hidraw2 - www.dcttech.com USBRelay4 [S/N: 12345]
Channel groups:
R1: channel
R2: channel
R3: channel
R4: channel
Supported configuration options across all channel groups:
conn: /dev/hidraw2 (current)
enabled: on, off
Display the relay state.
$ sigrok-cli -d dcttech-usbrelay --get channel_group=R1:enabled --get channel_group=R2:enabled --get channel_group=R3:enabled --get channel_group=R4:enabled true false false true
Manipulate the state of relays.
$ sigrok-cli -d dcttech-usbrelay --config channel_group=R1:enabled=off --config channel_group=R2:enabled=on --set
Resources
- V-USB project page, software bitbanging USB for AVR controllers that don't have native USB hardware support
- product description and source code repo of a private project that is not related to the vendor, implements OpenSource libraries and CLI and GUI applications to control these cards