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Welcome to the Feeding Experimentation Device (FED3) forum! Guide for posting:

1) We've seen more spam attempts lately from gmail addresses - please join this group with a .edu address if possible. If you request access with a non .edu address please include a message with enough information for me to verify you are a researcher/FED3 user.

2) Only post one issue or question per thread. If you have multiple questions please start multiple threads.

3) If possible please reply to an existing thread on a topic vs. starting a new thread.

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May 16

Strange files and unable to open them in Fed3Viz

Hi Lex, So sorry for the late response, I wanted to get back to you after trying all your suggestions

unread,

Strange files and unable to open them in Fed3Viz

Hi Lex, So sorry for the late response, I wanted to get back to you after trying all your suggestions

May 16

Yang Ge, … Matt Gaidica5

May 15

Intermittent Issues with FED Devices Logging Data to SD Cards

Thanks to all for the wonderful suggestions, i will follow all your recommendations and try to figure

unread,

Intermittent Issues with FED Devices Logging Data to SD Cards

Thanks to all for the wonderful suggestions, i will follow all your recommendations and try to figure

May 15

Taaseen Rahman, … Lex7

May 15

FEDs auto-restarting

Oh I see. I'll take a look at the heap issue too. Funnily enough, I've never experienced this

unread,

FEDs auto-restarting

Oh I see. I'll take a look at the heap issue too. Funnily enough, I've never experienced this

May 15

Neuron Signaling Lab, … Zane Andrews3

May 5

Fluctuation in BNC Output

Hi All - just following on from Matt's comment You should use fed3.BNC(x,y) in arduino for TTL

unread,

Fluctuation in BNC Output

Hi All - just following on from Matt's comment You should use fed3.BNC(x,y) in arduino for TTL

May 5

Taaseen Rahman, … Lex8

May 5

FED3 Bandit Task Questions

Hi Lex, That makes more sense. Thanks again for letting me know. I'll do it this way. Sincerely,

unread,

FED3 Bandit Task Questions

Hi Lex, That makes more sense. Thanks again for letting me know. I'll do it this way. Sincerely,

May 5

Yang Ge, Lex Kravitz2

May 5

Delayed discounting task

I haven't heard of anyone doing this but if you have an idea of how the task would work I can

unread,

Delayed discounting task

I haven't heard of anyone doing this but if you have an idea of how the task would work I can

May 5

Apr 19

Library version 1.17.0 released!

It's been almost 2 years since the last official FED3 library update, but we just released an

unread,

Library version 1.17.0 released!

It's been almost 2 years since the last official FED3 library update, but we just released an

Apr 19

Apr 19

Troubleshooting FED3

There have been a few comments lately about troubleshooting FED3. We host a FED3 troubleshooting page

unread,

Troubleshooting FED3

There have been a few comments lately about troubleshooting FED3. We host a FED3 troubleshooting page

Apr 19

Lydia Bailey, … JADE SENCY6

Apr 9

Cannot choose port/recognize device

Hi Lex! Just wanted to follow up and confirm that putting it in bootloader mode helped resolve my

unread,

Cannot choose port/recognize device

Hi Lex! Just wanted to follow up and confirm that putting it in bootloader mode helped resolve my

Apr 9

Mason Hardy, Lex3

Apr 7

Sending TTL pulses during pokes & changes in pellet availability state

Hi Lex, I finally got around to testing this, and it's working! The modifications allow me to

unread,

Sending TTL pulses during pokes & changes in pellet availability state

Hi Lex, I finally got around to testing this, and it's working! The modifications allow me to

Apr 7

Eloise Kuijer, … Lex5

Mar 20

Featherboard not recognised, red LED blinking fast

One additional thing you can try is to remove the Feather Adalogger board from the FED3 board and see

unread,

Featherboard not recognised, red LED blinking fast

One additional thing you can try is to remove the Feather Adalogger board from the FED3 board and see

Mar 20

Taaseen Rahman, Lex4

Mar 12

SD card exclamation logo

Yup! If you have a bad SD card I can see this feature not working correctly. Pro tip - if the card is

unread,

SD card exclamation logo

Yup! If you have a bad SD card I can see this feature not working correctly. Pro tip - if the card is

Mar 12

Arpit Kumar Pradhan, Lex2

Mar 1

Inquiry on Defining TTL Pulses with the Blink Function in FED3

Hi Arpit, There is no function called "Blink" in the FED3 library but there is a function

unread,

Inquiry on Defining TTL Pulses with the Blink Function in FED3

Hi Arpit, There is no function called "Blink" in the FED3 library but there is a function

Mar 1

Paige Bensing, … Christine Liu8

Feb 24

Logging Mouse Activity in Center Photobeam

Hi all, First of all, thank you all for your responses and help with this! I also wanted to report

unread,

Logging Mouse Activity in Center Photobeam

Hi all, First of all, thank you all for your responses and help with this! I also wanted to report

Feb 24

Feb 17

Replacing “Beam Break” Photointerrupters on the FED3

As the subject says! https://neurotechhub.wustl.edu/replacing-beam-break-photointerrupters-on-the-

unread,

Replacing “Beam Break” Photointerrupters on the FED3

As the subject says! https://neurotechhub.wustl.edu/replacing-beam-break-photointerrupters-on-the-

Feb 17

Paige Bensing, … Andrew Hardaway6

Feb 12

Nosepiece - Modified 3D Printing File?

Hi, I had to reup on these as well and just placed an order today as well. I'll report back with

unread,

Nosepiece - Modified 3D Printing File?

Hi, I had to reup on these as well and just placed an order today as well. I'll report back with

Feb 12

Paige Bensing, … Lex13

Feb 7

Issue Saving the Clock Reset

Thanks Jeff, I'm a bit confused as to why this would work but glad to hear it is fixing these!

unread,

Issue Saving the Clock Reset

Thanks Jeff, I'm a bit confused as to why this would work but glad to hear it is fixing these!

Feb 7

Ben Gourley, Tom Earnest5

Feb 6

FED3 files not recognized as FED3 data

Hi Ben, Definitely tougher to find this time! But looks like a transient logging error again. After

unread,

FED3 files not recognized as FED3 data

Hi Ben, Definitely tougher to find this time! But looks like a transient logging error again. After

Feb 6

Arpit Kumar Pradhan, Lex3

Jan 24

Sound strobe timing in the output csv file

Thankyou! On Thursday, January 23, 2025 at 5:55:25 PM UTC-5 lex.k...@gmail.com wrote: Hi Arpit, In

unread,

Sound strobe timing in the output csv file

Thankyou! On Thursday, January 23, 2025 at 5:55:25 PM UTC-5 lex.k...@gmail.com wrote: Hi Arpit, In

Jan 24

Paige Bensing, … Lex5

Jan 24

Motor Driver Board and RTC issues on FED3.1

A multimeter is a very helpful thing to have, I'd recommend buying one. You don't need

unread,

Motor Driver Board and RTC issues on FED3.1

A multimeter is a very helpful thing to have, I'd recommend buying one. You don't need

Jan 24

Eloise Kuijer, Lex2

Jan 20

Interpretation of Poke_Time = "0"

Hi Eloise! A zero for Poke_Time means FED3 didn't get a reading. Here's the relevant bit of

unread,

Interpretation of Poke_Time = "0"

Hi Eloise! A zero for Poke_Time means FED3 didn't get a reading. Here's the relevant bit of

Jan 20

Arpit Kumar Pradhan, Lex Kravitz2

12/22/24

Clearing Jam -No pellet dispensed

Hi Arpit, The motor is not supposed to stop above the dispensing chute - it just turns ~45 degrees

unread,

Clearing Jam -No pellet dispensed

Hi Arpit, The motor is not supposed to stop above the dispensing chute - it just turns ~45 degrees

12/22/24

Hamid Taghipourbibalan, Lex5

12/20/24

Realtime_Online_FED_with_Jamming_notification

Hamid thanks for your work on this, it's cool to see you continue to develop new features! I love

unread,

Realtime_Online_FED_with_Jamming_notification

Hamid thanks for your work on this, it's cool to see you continue to develop new features! I love

12/20/24

zane andrews, … Arpit Kumar Pradhan9

12/10/24

TTL output parameter

Dear Zane, Hope you are doing great! I came across your post of using FED3 with the RZ5 from TdT. I

unread,

TTL output parameter

Dear Zane, Hope you are doing great! I came across your post of using FED3 with the RZ5 from TdT. I

12/10/24

Arpit Kumar Pradhan, … Lex15

12/3/24

Using FED3.1 for sound operant conditioning task

Hi Arpit, Unfortunately FED3 is not currently set up to do this and I'm not certain it will work

unread,

Using FED3.1 for sound operant conditioning task

Hi Arpit, Unfortunately FED3 is not currently set up to do this and I'm not certain it will work

12/3/24

Arpit Kumar Pradhan

11/27/24

Parameters for successful learning

Hi Everyone, I hope you're doing well! I wanted to ask for your input on how you typically

unread,

Parameters for successful learning

Hi Everyone, I hope you're doing well! I wanted to ask for your input on how you typically

11/27/24

11/22/24

Wireless FED3 via Hublink.cloud

Hi everyone, I've been working on a new method to transfer SD card data at: https://hublink.cloud

unread,

Wireless FED3 via Hublink.cloud

Hi everyone, I've been working on a new method to transfer SD card data at: https://hublink.cloud

11/22/24

Arpit Kumar Pradhan, Lex2

11/19/24

Disassembling FED3

Hi Arpit, Definitely, go for it - the FED3 was designed to be taken apart :) You can watch the FED3

unread,

Disassembling FED3

Hi Arpit, Definitely, go for it - the FED3 was designed to be taken apart :) You can watch the FED3

11/19/24

Cayla Murphy, … Victor Cazares4

11/19/24

Inter-pellet interval extension to reduce hoarding?

Hi Cayla, From a learning theory perspective, adding a delay between the behavior and the reinforcer

unread,

Inter-pellet interval extension to reduce hoarding?

Hi Cayla, From a learning theory perspective, adding a delay between the behavior and the reinforcer

11/19/24

Lex, Eloise Kuijer2

11/18/24

Re: timed trial signalled by pellet deliver + LED cue

Great, thank you so much! I got it to work, for others interested in doing a similar thing, I changed

unread,

Re: timed trial signalled by pellet deliver + LED cue

Great, thank you so much! I got it to work, for others interested in doing a similar thing, I changed

11/18/24

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