UNI-T UT61E Auto Power Off, Part 3

It's tested and functional. I tested with just an IR LED hooked up to a power supply and the meter enabled and disabled the auto power off feature.

On the serial cable, I placed a jumper between pin 2 on the d-sub connector and R2 (red box). A 10k resistor was also put down (purple box). Oh yeah, and the IR emitter too (orange circle).

Again, all circuit diagrams used can be found here. Thanks Mr. Herbert!

To-Do's

-test serial cable

BOM

1x of LiteOn LTR-4206E phototransistor ... 3mm ... Digi-Key 160-1030-ND.
1x of LiteOn LTR-4206 IR Emitter ... 3mm ... Digi-Key 160-1988-ND
1x of 100k ohm resistor ... 0805 ... Digi-Key 311-100KCRCT-ND.

1x of 10k ohm resistor ... 0805 ... Digi-Key 311-10.0KCRCT-ND.
1x "UNI-T UT61E Auto Power Off v0.1" circuit board from OSHPark.
30 AWG wire similar to Digi_key K395-ND.