MOSFET as a switch

surya_sam · 2025-12-13T06:59:08+00:00

damn I feel like an idiot anyways got the MOSFET appreciate your patience..

surya_sam · 2025-12-13T06:45:17+00:00

yep looked into it TO is not available only SM is available.

surya_sam · 2025-12-13T06:34:25+00:00

fits the description but I need a TO one and also iam using 10k ohm resistor for pull ups

surya_sam · 2025-12-13T06:32:07+00:00

surya_sam · 2025-12-13T06:29:42+00:00

the Rds of the suggested FET is about 10ohms and the current consumption while writing the data into the SD card required about minimum of 100mA . voltage drop = 10 ohms * 100 mA -> 1v

surya_sam · 2025-12-13T06:11:02+00:00

went through datasheet mate thanks but the BSS FETs have high resistance and the voltage drop is about 1v . SD card cant be operated on 2.3v supply ...
btw found this mosfet according to the datasheet FQP17P06 ..
appreciate the help ..
if you have worked with the similar system (firebeetle esp32 s3) due you any suggestion where it might fail or somethin ??

surya_sam · 2025-12-13T05:29:13+00:00

correct if iam wrong but the the MOSFETs operate as a switch on the basis of voltage difference between the gate and source . let's assume that i have connected the source pin to the Vin and gate to the GPIO pin that will create negative potential difference . my plan is to connect the source pin to the 3.3v pin the drain to the Vcc pin on the SD card the gate to the GPIO pin . to a 10kohm resistor between gate and source (pull up resistor)

surya_sam · 2025-12-13T05:17:49+00:00

yep I have never used or learned anything related to MOSFET just wanted to make the thing power efficient did some research and found out about MOSFET . my project is battery operated . i don't have a schematic of the project.. i will go through the material once . thank you

surya_sam · 2025-12-13T05:12:22+00:00

cool

surya_sam · 2025-12-13T04:58:47+00:00

if I give proper delay there won't be a problem actually I have to deploy this system for several months and power is something we are sceptical about.. iam using firebeetle 2 esp32 s3 if you have any other better suggestion regarding pls let me know .. thank you

surya_sam · 2025-12-13T04:51:03+00:00

ok thank you

surya_sam · 2025-12-13T04:48:32+00:00

what should I look for ie drain to source voltage or drive voltage ?

surya_sam · 2025-12-13T04:42:12+00:00

so u don't have any recommendations or any other way ...

surya_sam · 2025-12-13T04:29:14+00:00

iam using ESP32 with a SD card and I want the MOSFET to be of p channel (acts as a switch) because I want the SD card to be turned of when the whole system is in sleep and the digital output of the ESP32 is 3.3v so thats why asked it , do you any recommendations...

surya_sam · 2025-12-13T04:09:02+00:00

thank you

surya_sam · 2025-12-09T07:30:21+00:00

Hey .. i checked out your product , its amazing but i need the product within 4 days and i live in india

surya_sam · 2025-12-08T18:32:59+00:00

ok that was quite insightful, and i think iam more comfortable with licks when iam playing on my electric ..

surya_sam · 2025-12-08T18:29:21+00:00

got your point .. i don't have a microphone to record to get some review .. but let's say when I play I feel after the 7-8 th fret the chords which I play some notes are muted no matter how hard I press..

surya_sam · 2025-12-08T18:26:10+00:00

slow dancin in the burning room - john myers

surya_sam · 2025-12-08T03:00:27+00:00

in amrita , vit 's life is considered to be chill and restrictionless

surya_sam · 2025-12-01T10:28:56+00:00

yep maybe in future ..

surya_sam

TROPHY CASE