r/askelectronics #M

99 results (0.01 seconds)

Tore scanner ribbon cable. Trying to find a replacement. HP M477fnw printer

Mar 20 ⋅ ⋅ ⋅ #M

What's the gain of this LM358 circuit? How do I calculate or simulate it?

⋅ ⋅ #M

My LM337 exploded. Any idea why?

⋅ ⋅ #M

Bypassing part of my power supply (polarity protection & filtering) resolved my Noise Machine squealing/stuttering issue, but I don't know why. How could these components be interacting with each other or the 5V regulator (L78M05) and/or power amp IC (PAM8302) to cause this issue?

⋅ ⋅ #M #PAM8302 #L78M05 #8302 #78

2 images

And it's purpose m

⋅

2 images

Please help identify this connector from a diode laser module :) (8mm wide, 5mm from end hole to end hole)

⋅ ⋅ #m #5mm-from-end-hole-to-end-hole #8mm-wide,-5mm-from-end-hole-to-end-hole #8mm-wide #5 #8

I am trying to make an am radio with an lm358 op amp but even with extremely high gain, I hear nothing, not even static coming through the speaker. If I disconnect the LC circuit and touch the non inverting pin it makes a 60hz humming noise. Is the gain too low? High? Is there something missing?

⋅ ⋅ #m

how to fix current leakage between source and drain (2n7000 MOSFET)

⋅ ⋅ #M #2n7000-MOSFET #7000

ELI5: How to use this STM32 and programmer tool.

⋅ ⋅ #M #5

Can anyone identify this component? Looks like a diode but struggling to find manufacturer (roughly 3mmx2mm)

⋅ ⋅ #m #roughly-3mmx2mm #3 #2

I have a Dell Optiplex 3040 Micro with an unpopulated M.2 header.

⋅

3 images

Which of these dots is the pin 1 marker? Chip is an STM32F407 in a LQFP144 package.

⋅ ⋅ #M #F #144 #1

Need help identifying this. It's from 24v power supply. On silkscreen its written thr1

⋅ ⋅ #m #1

These STM32 can be found for less than $2 shipping included. How?

⋅ ⋅ #M #2

Hey all! Just trying to fix a Milwaukee M18 charger and have no idea. Is the corrosion here the possible culprit? Where should I start? ECT. Any and all help appreciated.

⋅ ⋅ #M

TL072 behaves worse than LM358? Is it fake then?

⋅ ⋅ #M

2 images

Does the asm1117 board need a capacitor for stable and linear voltage?

⋅ ⋅ #m

Looking for one of these breakout boards (right) for a TQFP64 with 0.5mm pitch (dsPIC33EP512MC806)

⋅ ⋅ #right #M #dsPIC33EP512MC806 #512

This is from the power supply from an old sony home theatre kit and believe it to be faulty. Searching for a replacement gives me this EKMM401VSN391MA35S as the current part number but I can't find any in stock. Would anyone be able to help me source a suitable replacement? Thanks!

⋅ ⋅ #M

Would this LED Driver actually be do-able with reasonable parts like an LM358? Or is there some parameter in the Transistor/Op-Amp that's pretty much impossible in reality? I'm expecting yes but why?

⋅ ⋅ #r/Op-Amp #M

Hi, im trying to build a mini a/c with peltier cells but i dont know wich power supply use, cells consum 60w 12v 6,4a, ill use 2. My question is, do the amps add up? 6.4 + 6.4 = 12.8a or just using a 6a power supply is enough for both cells.

⋅ ⋅ #m

What does this symbol mean? (From the TI PCM3060 data sheet application notes). Ambiguous results when I image search for it. I guess VCC...but not sure.

⋅ ⋅ #M #From-the-TI-PCM3060-data-sheet-application-notes #3060

Where else can I put a transistor to switch the as-m/v opamp on and off?

⋅

What are your thoughts on the DSO Pro Oscilloscope (5 MHz bandwidth, 20msps sampling rate)? If I were to make simple robotics projects that don't involve measuring crazy wireless signals, what would something like this be enough?

⋅ ⋅ #M #5-MHz-bandwidth #5-MHz-bandwidth,-20msps-sampling-rate #20msps-sampling-rate #20 #5

Lets say I have this schematic: 3 strings of LEDs parallel to each other (15 LEDs in series in each string). The Vf of each LED is ~3.1V (3.1V *15=46.5V). How do you manage the variance in Vf and make sure the same current goes trough each string (around 50mA). Is there a simple way to do this?

⋅ ⋅ #m #15-LEDs-in-series-in-each-string #around-50mA #50

Is it possible to solder a U.FL coax connector on a 2.54mm prototyping pcb board ? (the connector is approx 3x3mm)

⋅ ⋅ #m #the-connector-is-approx-3x3mm #3

PIC18F processor specs; why are the absolute maximum currents for Port A (2 mA) lower than the currents listed in the DC specs (8.5 mA sink, 3 mA source)?

⋅ ⋅ #m #2-mA #18 #5 #3 #2 #8

Power supply (24V, 500mA DC) connects to T1-1 and T1-2 on this circuit board. Can you tell which terminal is positive and negative from this picture?

⋅ ⋅ #m #500mA-DC #24V,-500mA-DC #24V #500 #2 #1

Who made this LM358N? alldatasheet says its a low power dual amp but other datasheets say its something else

⋅ ⋅ #M

2 images

design a 4 kHz LC filter to reduce conducted RF from a TB6612-driven DC motor (20 kHz PWM) over a 1–2 m

⋅ ⋅ #20-kHz-PWM

2 images

Will this circuit work for solenoids instead of LEDs? The solenoids I want to use are small (link below) and a lit up LED represents a pushed out solenoid. Does voltage matter for solenoids? (ie will 5V vs 2V? https://www.aliexpress.com/item/32978781640.html?spm=a2g0o.detail.10

⋅ ⋅ #link-below #m #10 #5 #2 #0

Repairing Circuit Board on Noma Backup Power System 400; Voltage Regulators Blown - Repair or buy new board?

⋅ ⋅ #m

I'm have a BTA24 triac to control a 1300watt heater, the signal I'm getting from the current transformer on channel 2 of the oscilloscope shows that the current is interrupted shortly after it reaches the peak. Can you think of what might be happening here? channel 1 is mcu signal (stm32f411) 3.3v

⋅ ⋅ #m #f #stm32f411 #411 #32

If 'M' is under load, will the current go straight to the shared ground?

⋅ ⋅ #and-popped

Could I swap out the 741 in this 'octave shifter for guitar' for an lm324 to make it be able to run on 9v battery? More in comments.

⋅ ⋅ #m #741 #9

What broke on my Klein MM400 multimeter?

⋅ ⋅ #M

2 images

High side current sensor using LM324 : Why is the output voltage not proportional to the current through the sense resistor?

⋅ ⋅ #M

Can someone help me to identify what kind of resistor this is? It’s from a Philips Discovery tv from 1981/2? Accidentally snapped whilst replacing another part and I can’t for the life of me figure out what kind it is!

⋅ ⋅ #m #2

SRV05-4 layout for USB 2.0 High Speed(480Mbps)

⋅ ⋅ #M #480Mbps #480 #0 #2 #4

3 images

What is the simplest way to implement the digital input for this LM317 circuit? do you think this can also be done on LM337?

⋅ ⋅ #M

I have this headphone amp made, is there a way to lower the gain so i can use it as preamp for lm3886?

⋅ ⋅ #m

Exploded capacitor in Oscilloscope. (follow up) i’m a little confused about how i find a replacement and what type of capacitor i should buy specifically. the specs on the capacitor are 250v~MP 0,068 uF 20% X2 (fo-5,8MHz)

⋅ ⋅ #follow-up #M #fo-5,8MHz #fo-5 #8MHz #8

12V DIY Router UPS: Wall adapter voltage collapses to ~2V when connected to LM2596+XL6009 charging module. Need troubleshooting help!

⋅ ⋅ #M

2 images

Jumper wire maker. I want to buy or make something that will make these for me to a desired length from 22awg wire. Any suggestions?

⋅ ⋅ #m

Just a guy learning about electronics. I'm building a half wave precision rectifier using a lm13700 but I get significant distortion beyond 1 MHz. Any tips would be so appreciated.

⋅ ⋅ #m

My usb ports aren't getting power, so I measured the voltage (in image). So my question is if I change this fuse (if it isn't a fuse then please tell me what it is) would it work again? (PRIME A320M-K)

⋅ ⋅ #in-image #M #PRIME-A320M-K #320

What are those 5 blowned components? The chip is a LM7805C and those 5 seem to be in series, up to the input of LM7805C. (Product is a Minispin by Eppendorf, it's not turning on.)

⋅ ⋅ #M

I can’t get a simple LM339 circuit working. I have the + input wired to a variable 1.5-15V positive supply and the - input is wired up to +5V. But no matter the voltage on the + input the led always stays on no matter what. I’ve tried different variations, wiring, etc, but nothing seems to work.

⋅ ⋅ #M #15 #5 #1

Why is this happening? (Trying to make an AND gate from 2x NPN transistors)

⋅ ⋅ #m #Trying-to-make-an-AND-gate-from-2x-NPN-transistors #2

2 images

Do you think this LM337T is authentic?

⋅ ⋅ #M

Some images or videos are hidden because they can no longer be found or have been removed by the file host ()