I know this has been done in a previous thread (
https://forum.allaboutcircuits.com/threads/backlight-mod-for-uni-pt-ut-61e.103531/)
But i have made an auto backlight for this model as it doesn't come with any backlight, the circuit uses a photo transistor and an Npn transistor to put the Red leds on, power is taken from the Vbat+ Switch on side.
The main Microcontroller has a Backlight pin 102, and outputs pin105 for 10Sec, if you want to use it.
Unit T 61E Video...
https://forum.allaboutcircuits.com/threads/backlight-mod-for-uni-pt-ut-61e.103531/)
But i have made an auto backlight for this model as it doesn't come with any backlight, the circuit uses a photo transistor and an Npn transistor to put the Red leds on, power is taken from the Vbat+ Switch on side.
The main Microcontroller has a Backlight pin 102, and outputs pin105 for 10Sec, if you want to use it.
Unit T 61E Video...
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