# Edl1 logger problem **URL:** \ **Category:** GENERAL\ **Created:** [September 28, 2025, 10:20pm UTC](https://community.ecumaster.com/t/edl1-logger-problem/4475 "2025-09-28T22:20:07Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![sourcerer](https://avatars.discourse-cdn.com/v4/letter/s/45deac/32.png) [@sourcerer](https://community.ecumaster.com/u/sourcerer)\ **Post date:** [September 28, 2025, 10:20pm UTC](https://community.ecumaster.com/t/edl1-logger-problem/4475/1 "2025-09-28T22:20:07Z")
Hello, I have a problem with the EDL1 logger. I updated the Emublack to firmware version 3.056, then updated the edl1 to firmware version 1.21 using a lexar 633x 64GB SD card. After this update, the lexar card stopped working with the edl1 running firmware 1.21. However, when I downgraded the firmware to version 1.12, the card worked again.Decided not to bother with this card and switched to a transcend sd card. The problem started after this change. When I turn the key on with the sd card inserted into the edl1, the device doesn’t start the LEDs stay dark. If i remove the sd card, the edl1 starts without any problem. After booting, if i insert the sd card, it begins recording log data without issues. I connected scope to the Emublack 5V output (pin b26) during startup. With the SD card inserted, the voltage drops to 2.1V, then rises to 2.6V and stays there. I repeated the test without the SD card: the voltage drops to 4.4V and returns to 5V. With the Lexar SD card, the voltage drops to 3.9V and goes back up to 5V. I also tested with a sandisk sd card the voltage drops to 3.1V and sometimes fails to start; occasionally, it does start with this voltage. This 5v rail powers the pedal position Sensor, bosch oil temp/pressure sensor, and the edl1. I want to understand am I overloading the Emublack 5V output with sensors and edl1? ---
**Author:** ![Mikebau5](https://avatars.discourse-cdn.com/v4/letter/m/c5a1d2/32.png) [@Mikebau5](https://community.ecumaster.com/u/Mikebau5)\ **Post date:** [September 29, 2025, 6:35am UTC](https://community.ecumaster.com/t/edl1-logger-problem/4475/2 "2025-09-29T06:35:12Z")
I haven’t had any issues with the EDL1, but that might be because I’ve connected it to a 12v power, perhaps the power draw is indeed too high for the ecu to handle. ---
**Author:** ![sourcerer](https://avatars.discourse-cdn.com/v4/letter/s/45deac/32.png) [@sourcerer](https://community.ecumaster.com/u/sourcerer)\ **Post date:** [September 29, 2025, 4:01pm UTC](https://community.ecumaster.com/t/edl1-logger-problem/4475/3 "2025-09-29T16:01:13Z")
I will switch to ignition 12v for power source. Did you use sensor ground or ecu ground ? ---
**Author:** ![Mikebau5](https://avatars.discourse-cdn.com/v4/letter/m/c5a1d2/32.png) [@Mikebau5](https://community.ecumaster.com/u/Mikebau5)\ **Post date:** [September 29, 2025, 6:03pm UTC](https://community.ecumaster.com/t/edl1-logger-problem/4475/4 "2025-09-29T18:03:24Z")
I used ecu ground, don’t know if it’s required but I like to keep my 12v grounds away from my 5v grounds