Are expensive HDMI cables worth it? Yes and no. Below around 2m length no it is unlikely to make any difference. At longer lengths yes, but not because fancy pansy "high quality" cables are better and will make the picture or sound better, but because the cable needs to be compliant with the HDMI specifications and have been tested to […]
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Max Cable Length
HDMI Cables The video and audio data channels of an HDMI cable are capable of traveling over long distances. The DDC (Display Data Channel I2C bis) limits the cable length of HDMI cables. According to an expert who tests cables for compliance, going above 18m even with the best cables requires active repeating of the DDC connection.
Soft Start
Soft Start Example Circuits
Implementing CAN Bus In Software
Some notes about the bus signals CAN bus needs the terminators fitted to the cabling. If not the signals you see with a scope on the RX side of the transceiver will be wrong! The CAN bus TX line (pre transceiver) idles high. The CAN bus RX line (pre transceiver) see's everything you TX too (it needs […]
Parallel Connecting Capacitors
There are several reasons why you often see capacitors, particularly electrolytics, connected in parallel: EEVblog #742 – Why Electrolytic Capacitors Are Connected In Parallel
ESR
ESR = Equivalent Series Resistance Lowering ESR Use lower value capacitors connected in parallel. This gives you the overall capacitance you want and the overall ESR value works just as for normal resistors wired in parallel. ESR and Heat ESR is resistance so if your capacitor has lots of current flowing in / out / etc then the […]
Convert toggle switch on to pulse
This circuit can be used to convert a power on switch to a short pulse, which can be useful for instance where you want a micrcontroller to take over keeping the power on once it has started up, allowing it to cause power off should say the system battery level become too low. Or any […]
CAN Transceivers
3.3V CAN transceivers 3.3V and 5V CAN transceivers are interoperable because High Speed CAN physical layer uses differential signaling that is the same for a 3.3V and 5V CAN transceiver. In addition both the 3.3V and 5V CAN transceivers have the same wide common mode range accommodating not only the typical signaling but also providing wide margin for ground […]
USB Diagnostic Tools
Windows USB Diagnostic Tools www.uwe-sieber.de/files/UsbTreeView.zip Unzip it and for 64 bit Windows you simply run USBTreeView.exe in the x64 folder (you don't need to install it). To use on a clients system ask them to go to "File > Save Full Report" and send this report to you.
.BLE General
Referred to as: Bluetooth Low Energy BLE Bluetooth Smart Part of the Bluetooth 4.0 specification, but has a different specification to classic Bluetooth (it is a lightweight subset of classic Bluetooth). Bluetooth Low Energy is now the best / simplest interface to include for connectivity to any modern mobile operating system (iOS, Android, Windows phone, etc). […]