Most LCR-T7 units ship with a version of the software originally developed by Markus Frejek and furthered by Karl-Heinz Kübbeler. Updating to a newer or alternative version (like the popular m-tester or k-tester branches) offers several benefits:
Some custom firmware versions allow for additional features like frequency generation or PWM output. lcr t7 firmware link
The most up-to-date code is usually found on GitHub. Look for repositories specifically mentioning the (the microcontroller usually found in the T7). Most LCR-T7 units ship with a version of
The following links provide the "k" (Kübbeler) and "m" (Reschke) software versions, which are the industry standard for these devices: TransistorTester-Source (GitHub) : The official source for the "k-firmware" lcr t7 firmware link
Try Wayback Machine (archive.org) on dead links. Alternatively, search filetype:hex "LCR-T7" in Google – but scan with antivirus before using.