Hackaday5 年
HP 3478A
Take the Hewlett Packard HP 3478A multimeter; the stock transflective display with its 14-segment characters is so hard to read that people usually have to add a backlight to use it. That wasn’t ...
Hackaday5 年
Multimeter Display Perked Up With Nixies, LEDs, And Neon Tubes
Take the Hewlett Packard HP 3478A multimeter; the stock transflective display with its 14-segment characters is so hard to read that people usually have to add a backlight to use it. That wasn’t ...