resistor

I’m working on connecting the resistor/heating element of my boiler, and I’m using the thermostat shown in the photo below. From what I understand, this is a 4-pin thermostat. I measured continuity with an ohm-meter and found the following: The two terminals on the left have continuity with...

Are there any benefits or not, of joining 8 LED's up to 1 resistor or via 8 single resistors. Most circuits until a few years always showed any 8 bit chips each being monitored by a single LED and a single resistor. But it seems some circuits now show the 8 less being commoned up through a...

Hi, I am making this splitflap: https://splitflap.home.blog/step-by-step-instruction/ and am doing pretty well with everything - the one thing I am stuck on is working out the components for the master PCB (where the resistors go). I am pretty new to making things with PCB's so a little out of...

Hello please help Im a DIY notive i have some basic knowledge but struggling to identify whats causing resistor to keep burning on my eltax A-8 subwoofer amp circuit board. Reason it blew was I played music to high and burning started coming from subwoofer. I've replaced the speaker but now its...

How can I find resistor values form voltage drop across the resistor I needed? 5V DC supply will get convenient into 2.3 V and goes GPIO of Controller and LED is connected to indicate the supply is on I want find value of resistor if the voltage drop is 1.9V and 0.7V for R1 and R2

I want to design a circuit mechanism that will amplify the input current by 6 times. The circuit must contain at least 3 MOSFETs, 1 independent source, 1 resistor. I tried but couldn't do it on ltspice. Can someone show me the circuit on ltspice ? thanks.

Would like to make a simple car side-mirror simulator circuit. The side mirrors I installed (for better blind spot) do not have a dimmer circuit and I am getting LIN bus errors since the dimmer wires are disconnected. Would like to DIY something that fools the car into thinking it is...

Hello all I'm trying to make a small circuit in which i have to choose the resistance value.. can someone tell me how to choose the resistor value at the input of Optocoupler IC. And my input voltage is 3.3V .. and current 25mili amps ..

Hello, looking for assistance, I am used to identifying resistors by the colour code. I have a pair without colour code, these were soldered though hole in a power supply PCB for a Bang and Olufsen television. The PCB is about 8 years old and the failure seems to be commonplace at this age...

Need help identifying this component, in the motor control board for my Sole 2014 F63 treadmill. I believe it's a fusible resistor but can't tell what size or kind. Also not sure if this is the root of the original problem (see below) or just an added headache to slow me down and get me yelled...

So I have been working on a BASH amplifier out of a Triad Silver Omnisub and have come across a resistor that I’m having a hell of a time identifying the value of. It reads at very close to 39 ohms, but from the colors of the bands on the resistor, I’m stumped as to what it’s original value...

Hello everyone. This is my first post on the forum, I am currently working on a seemingly simple circuit. I think a constant current driver is the solution; after wiring everything up last night the LED was nice and bright and circuit ran great. I decided to charge the Lipo over night, and when...

Hello, I have a broken Panasonic TV that has a broken three-pin RWT05 15 ohm 142 Celcius cement resistor. Not a ceramic capacitor. It's a cement resistor. I messed up in the title, sry about that. Now my question is, is there a replacement for it, or a resistor that I could use instead of that...

So I have a switch connected via two wires to a two pin plug which is supposed to go in a two pin socket. One pin of the socket goes to 5V and the other goes to a digital I/O in the Arduino + GND (via 10K). When the switch is pressed and the digital arduino pin goes high, stuff is supposed to...

This circuit has been designed and optimised. When implementing on PCB R3 resistor is burning up. Any reasons or suggestions for this to happen? Circuit is stable and safe when supplied with 190V and any higher R3 starts burning up. R3 has a power rating of 0.125W went with the parameters of PI.

Hi, I noticed that 4.7k ohm pull-up resistors are used in this circuit on the read/write memory pins: Saundby's MAG 85(scroll down to yellow text), but in other circuits where the read/write / io/m signals are decoded by the 74138 for example, pull-ups are not used? Is it because in the MAG 85...

Hello everyone! I'm trying to solve this assignment and I'm not sure what to do with all those resistors. Should I calculate an equivalent resistance for each group? And how do the resistors connected between the terminals of the op-amps influence the circuit?

I have a garage door and the controller board had a few dead components that i replaced, but the only one part is difficult to find bc it's dead and i cant measure it, is this a "10 kOhm 1W" resistor or a "10 Ohm 1W" or is it a really different one?.

I have watched recently this video: At the end of it he describe a way to make edge detector by using capacitor and resistor. The thing is i don't see it being discharged in any way. Would't it make it impossible to charge again and in consequence make current flow through the resistor and make...

Hi all, below is a TL 431a voltage regulator circuit. Just out of curiosity, what can I do to replace TL 431a with its internal discrete components circuit so that I can better understand how a voltage regulator works :) I have posted my LT Spice file below so that you can unzip and simulate it :)