This is often just a suitable series resistor, as impedance transformation is not critical. If the rig does not support PTT operation via its serial remote-control port, an additional optoisolator is required for PTT operation. USB Audio Interface. The original case and the 3. Shielded cables, with suitable connectors for your rig, are then soldered to the transformers. The whole assembly is then enclosed in 19mm, dual wall, heatshrink tubing. Note: There are two different sound card PCB layouts available, type 1 and type 2.
Please check which one you have. VOX Circuit. It detects the digital-mode tones from the USB sound card output and then activates the rig's PTT line, causing transmission of tones when they are present. It is powered by the 5v supply from the USB port. It uses an opto-coupler to provide PTT isolation. When used together with the transformer-coupled USB sound card, the computer and the rig will be galvanically isolated. Here is how it works: Q1 amplifies the audio signal.
D1, D2 and C3 detect the tone waveform. The performance of the VOX circuit is adequate for most digital modes: The attack time is under 1ms. The hold time is about 5ms. The unit was constructed by wiring the CM sound card to a PTH prototyping board, before adding the surface-mount components required for the VOX circuit and the isolation transformers for the sound card. PTH components could be used instead. However a few simple guidelines can help to ensure that it works well and does not cause any hiccups.
Plug device in firmly: Make sure the device is firmly plugged in so that proper contact is made. Also as the USB plug is retained in the socket by friction, make sure it has been plugged all the way in so it does not fall out.
Take care plugging in: Make sure the plug is the right way round. Sometimes it may need a careful look to make sure the USB plug is the right way round. Especially with the smaller connectors, USB mini and USB micro, it may not always be easy to see which way round it should be.
Eject properly: With devices like memory sticks, make sure the device is ejected in the software before physically pulling it out. Be aware of current restrictions: USB ports can only supply a certain amount of current. Peripherals like external CD drives, or even other equipment may require relatively high levels of current and may not work if connected via an expander dongle. They may need to be connected directly into the computer port, etc. USB has many advantages when compared to other technologies, but it also has a number of disadvantages which need to be considered when deciding on a technology to be used.
USB has many advantages and this is why it is so widely used. However, its simplicity and ease of use, mean that it is not always applicable in applications where more sophisticated interfaces are required for very high speed data transfer. USB, Universal Serial Bus is used virtually without exception on most PCs, even Macbooks which have migrated to the lightning connector have interface cables to enable them to easily interface with USB.
With the host of other peripherals that use USB, connectivity using this interface is essential for virtually every computer based device. USB releases and evolution The USB interface was developed as a result of the need for a communications interface that was convenient to use and one that would support the higher data rates being required within the computer and peripherals industries.
Read more about. USB Hubs. Shopping on Electronics Notes Electronics Notes offers a host of products are very good prices from our shopping pages in association with Amazon. However, note, that does not say what USB protocol is supported. That is up to the software. You need to do some leg work and figure out which USB protocol your game pad is using.
Or if you can use your keyboard as the gaming input. Show 5 more comments. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.
The Overflow Blog. Stack Gives Back Safety in numbers: crowdsourcing data on nefarious IP addresses. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Related 1.
0コメント