circuit

Hello! I want to automate my Philips 3300 Series LatteGo coffee machine, and ideally without opening it up and voiding warranty. The cheapest, simplest idea seemed to be remotely activating the capacitive touch buttons on the control panel of the machine. It seems remote activation of...

I'm trying to find the oscillator circuit in a ti 84 plus ce, and the oscillator is integrated inside an ASIC with ram and cpu, but there would be a circuit that leads out of it. I've tried voltage testing the test points and frequency testing, but there's many voltages that match and the...

I have a project that requires use of the Arduino Nano or any other microcontroller that gets the job done. It needs to be able to run a 3x10 LED array circuit or circular LED circuit. A RTC module, SD Card module, LCD screen, and a ultrasonic sensor. Is this possible to run on one Nano or...

Hello! I’ve been searching for a reliable transformer-less power supply circuit for quite some time now. After going through countless circuits on Google, I still can’t find any compact designs that seem trustworthy. Companies have been creating super compact and safe power supplies for...

Hello, i'm a student and i need a bit help to understand a circuit (attachment). Attached is the schematic of the DO2 meter from DFRobot (https://wiki.dfrobot.com/Gravity__Analog_Dissolved_Oxygen_Sensor_SKU_SEN0237#More). The circuit gets attached to galvanic DO probe, which should output a...

I realized my circuit in Crocodile Clips, but I have some doubts about my circuit. Maybe someone could help me? Please

I need suggestions for a diode or some type of one way “valve” for a wire in my car. I recently wired up a fuel pump relay with 2 power sources to control the relay. But I need suggestions for a diode to add to one of the wires to prevent backfeeding. I used a zener diode with a Vz of 12v but it...

Hi everyone, I'm working on a project to make an LED that fades in and out (breathing effect) and operates on a 12V power source. I have the following components: 12v strip led 3x 3.7v batteries connected in series = 12v (with added extra voltage when fully charged resulting in 12v) BC547 NPN...

Hi, I'm a physics student, and I have a small problem for a lab that I have to solve. Here is my problem: I must create a circuit which uses capacitors to gradually close a light, but in addition, we must pass the current from the capacitor which discharges by the base of an NPN transistor. A...

Hello AAC, I have a laboratory requirement about making a circuit with the following characteristics: With good variety of components (Say, 12 unique components, but there is no specific number) With 741/358 and/or a 555 timer With 3 analog sensing elements (Say, a LDR) No microcontrollers No...

Hello everyone. I have a problem regarding low pass pi filters. For context, I am a physics student and this is way, and I mean WAY outside of my purview. So much so, that I can't find this circuit, or anything like it in my textbooks. After some gruesome research, I found some formulas which I...

Dear Members, I hope you are all doing well. I am a PhD student and completely new to circuit design. I need a compact-sized circuit and prefer not to use an impedance analyzer due to its bulkiness. I am looking to build a circuit capable of automatically measuring the impedance of a sensor in...

Hi all, Not sure this is the right place but Im looking for some expertise/help in understanding design of a simple circuit. Im looking to make something that would make a noise after being triggered by either impact or a magnet. Looking for this to be very very small also. Smaller than a...

I am a complete beginner, but I would like to learn how to use Altium Designer. Sorry in advance for the silly questions. I have the following two circuits (pic no. 1) that I want to combine into one circuit and draw in Altium Designer schematic. I tried to draw the mentioned circuit in Altium...

First Time poster! I am designing a heater circuit that will source a large amount of current (5A max) to a grid of resistors (each resistor gets 5A) from multiple voltage sources so that I can change the thermal "image". I am toying around with ways to get this done. By far the easiest is to...

I have this non-latching metal power switch with an LED inside, to light up the "power symbol" on the switch. I am currently looking after a circuit that can make this LED gently fade-in whenever power is connected to the circuit. The switch uses a "standard" (or "normal") LED. The...

Hello, I dismantled the camera assembly you can see in the photo months ago from this circuit. Now I don't know where the cables are, I tried a few places by trial and error but in vain. Can anyone find this for me?

(Today is National Retro Day) I'm adding HDMI output to my vintage Atari 800XL 8bit computer to project it on my large TV. I'm a novice. I've built a circuit for "High Speed Analog RGB to YPbPr Converter" using an LT6559 & LT1395 to "map RGB signals to YPbPr". It doesn't seem to work and it...

Hi, im working on creating a step counter using piezoelectric disks. The idea is that I want to use the disks as sensors and be able to read their voltage and current values with an Arduino Uno. Im also using a voltage sensor, the sensor that will be used is an ACS712 that can detect the flowing...