# Shield Shield and MEH1-MEH4 **URL:** \ **Category:** Troubleshooting\ **Created:** [July 13, 2017, 9:15pm UTC](https://community.particle.io/t/shield-shield-and-meh1-meh4/34550 "2017-07-13T21:15:31Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![ovro67](https://avatars.discourse-cdn.com/v4/letter/o/49beb7/32.png) [@ovro67](https://community.particle.io/u/ovro67)\ **Post date:** [July 13, 2017, 9:15pm UTC](https://community.particle.io/t/shield-shield-and-meh1-meh4/34550/1 "2017-07-13T21:15:31Z")
On the Shield Shield schematic the level translator IC, shows MEH1-MEH4 on the 3.3V side. Do these connect to any pins on the Photon, if so which one’s? Where do HUH1-HUH4 go? I don’i see these on the Pin Assignment Chart. I measure 150Ω between (A0 Arduino) and (A0 Photon), and likewise on (A1 Arduino) and (A1 Photon) but I can’t find A0 & A1 on the schematic. I will be using A0 & A1 in my code on the Photon can I still connect an Adafruit I2C\_RGB\_LCD Shield without isolating these A0 & A1 on the Display Shield? Thank you. ---
**Author:** ![KyleG](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/kyleg/32/11077_2.png) [@KyleG](https://community.particle.io/u/KyleG)\ **Post date:** [July 14, 2017, 3:16pm UTC](https://community.particle.io/t/shield-shield-and-meh1-meh4/34550/2 "2017-07-14T15:16:24Z")
Let me ping someone that might be able to help, @tylercpeacock are you able to assist? Kyle ---
**Author:** ![ovro67](https://avatars.discourse-cdn.com/v4/letter/o/49beb7/32.png) [@ovro67](https://community.particle.io/u/ovro67)\ **Post date:** [July 31, 2017, 9:14pm UTC](https://community.particle.io/t/shield-shield-and-meh1-meh4/34550/3 "2017-07-31T21:14:38Z")
Hi Kyle, Hey I was wondering if you’ve noticed I haven’t had any replies on my last 2 posts for help? Forget the 1st one but I was wondering if you have any contacts in the technical department at Particle that might be able to help? I’m trying to identify the dedicated mosfets, Q1 & Q2 used on the I2C lines so I can purchase another to fix the problem I’m having with the Shield Shield level converters. I can’t find the Marking code that has this information. Why do you think I can’t get any response? Thanks, Ron ---
**Author:** ![KyleG](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/kyleg/32/11077_2.png) [@KyleG](https://community.particle.io/u/KyleG)\ **Post date:** [August 1, 2017, 1:48am UTC](https://community.particle.io/t/shield-shield-and-meh1-meh4/34550/4 "2017-08-01T01:48:52Z")
Yes, let me ping someone else. @rickkas7 do you have any idea for this? ---
**Author:** ![ovro67](https://avatars.discourse-cdn.com/v4/letter/o/49beb7/32.png) [@ovro67](https://community.particle.io/u/ovro67)\ **Post date:** [August 1, 2017, 4:03am UTC](https://community.particle.io/t/shield-shield-and-meh1-meh4/34550/5 "2017-08-01T04:03:56Z")
Gregg, The help I need now is with the post I started on &/27 ( Remove TXB0108PWR Level Translator Shield), I’ve given up on my earlier post. Thanks for your help. Ron ---
**Author:** ![ScruffR](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/scruffr/32/6952_2.png) [@ScruffR](https://community.particle.io/u/ScruffR)\ **Post date:** [August 1, 2017, 6:35am UTC](https://community.particle.io/t/shield-shield-and-meh1-meh4/34550/6 "2017-08-01T06:35:44Z")
Do you mean Kyle? And when refering to another thread, why not post a link - this wouls make things easier to just hop over to the other thread instead of needing to search for ... > [@ovro67](#): > > started on _ **&/27** _ ( Remove TXB0108PWR Level Translator Shield) ---
**Author:** ![ovro67](https://avatars.discourse-cdn.com/v4/letter/o/49beb7/32.png) [@ovro67](https://community.particle.io/u/ovro67)\ **Post date:** [August 1, 2017, 12:52pm UTC](https://community.particle.io/t/shield-shield-and-meh1-meh4/34550/7 "2017-08-01T12:52:57Z")
ScruffR Yes I did mean Gregg. Sorry for that. Also great suggestion about adding link. The version 1 Shield did not have the I2C misfit, they were added in V2. > [@Remove TXB0108PWR level translator from Shield Shield?](https://community.particle.io/t/remove-txb0108pwr-level-translator-from-shield-shield/34896): > > I’ve been working on a project that uses I2C for Temps, Humidity, and 16x2 RGB LCD display, (3) 1-Wire DS18B20’s and reads 2- analog voltages. Everything is working using a small breadboard. I decided to use the Shield Shield since it provides a small prototyping area and the Adafruit (714) Display Shield seemed like a good choice. I discovered the when the Photon is plugged into the Shield Shield that it interferes with the Display Shield unless you use stacking headers, this raises the Disp… ---
**Author:** ![ScruffR](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/scruffr/32/6952_2.png) [@ScruffR](https://community.particle.io/u/ScruffR)\ **Post date:** [August 1, 2017, 6:52pm UTC](https://community.particle.io/t/shield-shield-and-meh1-meh4/34550/8 "2017-08-01T18:52:32Z")
> [@ovro67](#): > > Yes I did mean Gregg I still don't know who this _Gregg_ should be - @KyleG, do you have another name, we don't know of 😉 @ovro67, who are you talking to? ---
**Author:** ![ovro67](https://avatars.discourse-cdn.com/v4/letter/o/49beb7/32.png) [@ovro67](https://community.particle.io/u/ovro67)\ **Post date:** [August 1, 2017, 7:44pm UTC](https://community.particle.io/t/shield-shield-and-meh1-meh4/34550/9 "2017-08-01T19:44:41Z")
I’m sorry for the confusion I caused. I meant KyleG. He is listed as the Particle Forum Moderator.