I would like to build a simple automatic irrigation system with Raspberry Pi zero, the thing is that I don't have access to electricity outside. I thought to connect 5v solar panel + 3\4 chargeable batteries.
Im not that familiar with building control circuits for charging batteries...
Hope you are all doing fine. I have been facing an electrical issue in my house since last Christmas. When the lights or any appliance with motor in any room are turned off/on the TV would go out and come back ON in a short span (as if the power went out and came back in a...
I have a simple DC power control circuit that I want triggered by reed relays. It is for model railroad use. One set of reed switches detects the passing of the train . The first switch turns the power on to a trolley car so as the train passes the trolley car is moving. The second reed switch...
Quarantine project: Adapting a Sony BFV-20W viewfinder
Scroll down to skip the background info
As a cinematographer, I've always really felt most comfortable shooting with a viewfinder. However modern electronic viewfinders all exist in the "prohibitively expensive" class of filmmaking...
So I have a project I'm working on a project to light these "NFC fingernail lights":
They light up when in the presence of a 13.56MHz RFID field. The issue is other than my phone, I have no way to light them day to day.
I would like to develop a device I can hold, like fist semi closed and it...
I am building my first lab and I think I will need a power supply. Was wondering if I can run my thinking through you guys and maybe ask a few questions, please!
1. Variable DC power supply - Budget: under £200.
I am pretty sure I'll need this. I've already looked at some circuits that require...
I am working on automated pressure controller which will be used in a car. The controller consists of following:
- Power supply (10V-20V input, 5Vdc 1A max output)
- MCU STM32 (valve controller for pressure regulation + reading 4 pressure sensors)
- WiFi functionality (ESP8266)
Hello great team!
I'd immensely appreciate the help of brilliant minds out here.
I've Solar rechargeable emergency unit that can power 2 lights and a small table fan. The unit stopped working with a blown resistor on the circuit. I did try replacing the resistor with an identical color coded...
I'm working on designing a circuit with two distinct loads - one being a DC motor and another being an LED strip. I want to run both off the same power source, but they have different voltage requirements. The strip requires a fixed 5V and the motor will require 12V+.
I'm currently planning...
I am designing a transformer for a high voltage converter. The topology is a push-pull converter. My method is to have a 200V primary generate 4x750V secondary windings, each feeding a voltage multiplier to generate 1500V. Then connect these in series and generate the final 6kV.
So far I have...
Say there are 3 buses of:
Bus 1: Slack bus with a voltage source of E=1.0 and phase of 0°
Bus 2: a generator and a load.
Bus 3: a load.
The line impedance are given below:
z12 = 0.05 + j0.1
z13 = 0.02 + j0.05
z23 = j0.05
z11 = -j100
z22 = infinity
z33 = -j40
The generators and loads are given...
Was cycling near a hydroelectric power plant generator with my sister and she asked me if they can be shut down. I said "Yes, all power plant generators can be shut down". I wasn't sure, so here I am to get some inputs on the safety procedures from AAC readers. Thanks. Any input is appreciated!
I am trying to get my head around how power converters regulate the output voltage at no-load conditions. My output pulses from substantially full load ~200mA to substantially no load 0A at frequencies anywhere from 100Hz to 100kHz.
My question is quite clear already but, how exactly does a...
Hi all, I just couldn't find the answer on web so I had to ask you guys.
Based on my understanding, input power is ideally equal to the output power of a circuit unless it is dissipated to heat.
So I was looking at the ULN2003 Darlington controlling a 28byj-48 stepper motor using an Arduino...
I got stuck on a homework question about narrowband instantaneous power.
First of all, the description of the quesion:
Assume a mobile traveling at a velocity of 20 km/h receives two multipath components at a carrier frequency of 1000 MHz. The first component is assumed to arrive at...
I have been studying the use of snubber circuits within flyback converters and other hard-switched converters, and doing some simulations to see the results. I have came across one type of snubber called a passive snubber circuit, which uses no resistor and instead some additional passive...
Good night. I bought this flashlight for my bike:
But the light that comes out seems very little to me. I think it has more potential. Could I modify...
Hi. I am trying to build a power supply which output is 2000VDC and 20mA (40W) input is 220V ac (european input).
I thought I can use flyback transformer. And I started to design. I selected duty cycle as %50 and frequency as 50kHz (actually I don't know how to select frequency and duty cycle...
I plan to build a high capacity 3.7V/5V solar charging powerbank (something like 10-15ah).
I’m going to use modules of TP4056 breakout board each coupled with two 18650 cells in parrallel.
But I was wondering what would it need to charge two or three of these TP4056 modules with a...