2016年4月5日 · I'm trying to figure out what does RU or maybe UR label mean on the body of many many relays. It's labeled almost on all (I've seen so far) DC relays which make me very curious :). Any suggestions?

2017年5月30日 · The UR mark is used for components of products that would need a UL product listing. When a product made with UR recognized components is submitted to UL listing, UL does not need to investigate the components in detail but only review their use in the final product, the manner of final construction etc. UL listed panel shops construct certain ...

2020年9月15日 · Note that the EEC capacitor does not appear to be a UL-recognized component; the original All-Earth is (the backwards UR logo on the bottom-left of the silkscreened area).

2017年3月9日 · This is one of two bridge rectifiers recovered from a failed LED lamp. I've seen the 'backwards R' before but don't know what it means/identifies. The other logo on the left is one I've never seen before. Can anyone identify/explain either of these? Thanks.

2023年4月4日 · It will not work, because the STM32F103 factory bootloader does not support USB DFU. If you want to have USB DFU, you must first program a custom bootloader which enables you with DFU.

The weird symbol indicates its a DC output. This laptop adapter supplies an output voltage of 19 V and a maximum output current of 3.42 A, well above your original adapter's 2A maximum. This doesn't mean your device will consume 3.42 A when its powered with this adapter; it is only an indication of the maximum current that can be drawn through the adapter by any device that it is connected to ...

2021年1月31日 · I've been working on a problem with two different boards (one using an STM32F7 and the other using STM32F3). When attempting to program the boards (using an ST-Link provided on Nucleo/Discovery boa...

2013年7月1日 · Altera's and Xilinx's basic building block is a 4-input look-up table (LUT), a flip-flop and some additional circuitry that Altera calls a logic element (LE) and Xilinx calls a logic cell (LC).

2016年1月2日 · I independently discovered this in real life, as have many people. Anecdotally this seems to have been common with CRTs, both monitors and TVs, perhaps because of the form factor, popularity of these objects, and something in the electronics that made this method work - hypothetically like unseated chips, soldering issues etc. My question is specifically about if someone knows what could have ...

2022年6月22日 · I managed to write a script for flashing hex file into STM microcontroller. "C:\Program Files\STMicroelectronics\STM32 ST-LINK Utility\ST-LINK Utility\ST-Link_CLI.exe" -c UR FREQ=80 -ME -P "C:\Usr\someHex.hex" 0x08000000 -V -TVolt Although it is showing that the process has completed and flashed the program.