OT - Standby electrics - worth consideration?

Started by Charlie+ in sci.electronics.basics4 weeks ago 14 replies

I just worked out that in my (UK) house (with my children long gone!). The electric standby items are going to cost ?452 UKP per year at October...

I just worked out that in my (UK) house (with my children long gone!). The electric standby items are going to cost ?452 UKP per year at October 2022 going forward cap levels, and of course more again at the next cap level(s) in 2023. I have used 52 pence per kWh and 58 pence per day service charge. YMMV. Measurement was taken at the supply meter with no items full running. As a quick ...


Hear sounds from TV to my radio

Started by AK in sci.electronics.basics1 month ago 2 replies

I want to hear sound from my Tv using my standalone radio. All the TV output HDMIs are being used. My inputs on my radio for TV/Dbs are...

I want to hear sound from my Tv using my standalone radio. All the TV output HDMIs are being used. My inputs on my radio for TV/Dbs are coaxial. What parts do I need? Thanks.


Detect the turbidity

Started by Marcos Loyola in sci.electronics.basics1 month ago 2 replies

Hello good day! I need a simple circuit to detect the turbidity of the reuse water from the washing machine, that is, discard the 1st water and...

Hello good day! I need a simple circuit to detect the turbidity of the reuse water from the washing machine, that is, discard the 1st water and reuse the others, a very simple circuit for a low-income community. Thank you Marcos


Replacement for Li-Ion battery

Started by AK in sci.electronics.basics2 months ago 2 replies

I want to replace this 3.7 Volt Lithium Ion battery. The dimensions are 1 14/16 x 8/16 inch. Can some help me find a...

I want to replace this 3.7 Volt Lithium Ion battery. The dimensions are 1 14/16 x 8/16 inch. Can some help me find a replacement? Thanks, Andy https://imgur.com/a/w5v2dHI


(accidentally) shorted a mosfet's drain and source

Started by Michael Darrett in sci.electronics.basics4 months ago 5 replies

For a project I noticed my Arduino PWM pump controller (basically just an Arduino, MOSFET, and protection diode) was behaving oddly, so I powered...

For a project I noticed my Arduino PWM pump controller (basically just an Arduino, MOSFET, and protection diode) was behaving oddly, so I powered the pump directly from the 12V power supply, turning it off and on as needed manually. I looked more closely at my breadboard, and noticed the drain and source were touching. The circuit had been running for a few minutes this way. Did I damage my...


DATE OF CLOSING

Started by Guillermo Rodriguez in sci.electronics.basics5 months ago

I WOULD LIKE TO KNOW WHEN THE SCHOOL CLOSED?

I WOULD LIKE TO KNOW WHEN THE SCHOOL CLOSED?


Controlling alot of LEDs from Arduino or AVR. Maybe 74HC595

Started by Sid 03 in sci.electronics.basics5 months ago 4 replies

I am trying to create a project much like like a Marquee sign, I want to be able to control hundreds of LEDs from a set of chips. From my...

I am trying to create a project much like like a Marquee sign, I want to be able to control hundreds of LEDs from a set of chips. From my research I found the 74HC595 chip and using a bunch of these would probably work, but it would be nice if I had the ability to change each intensity of each LED like each LED pin had its own PWM controller on each LED ? Is there a chip-set out there t...


Why A DC to DC Converter Will Not Increase Range of the $3 Voltmeter Either

Started by Bret Cahill in sci.electronics.basics5 months ago 2 replies

Guessing that there was no clever end run around the 30v maximum I tried a DC to DC converter set to 15v then measured the voltage between the...

Guessing that there was no clever end run around the 30v maximum I tried a DC to DC converter set to 15v then measured the voltage between the +38v and the +15v. Instead of 23 v it jumped around all over the place then settled on 3.x v. A cap between the terminals might not work either and may due to the fluctuating current short out the converter.


Why the $3 Voltmeter Cannot Work With Inline Resistance

Started by Bret Cahill in sci.electronics.basics5 months ago 1 reply

The lowest voltage it can measure is what powers the LED display so something must be acting like a DC to DC converter set at the display...

The lowest voltage it can measure is what powers the LED display so something must be acting like a DC to DC converter set at the display voltage. Additional resistance in series lowers the current too much to power the display. It only works on an ideal voltage source.


Jus Run the Voltage Backwars Thru a 8 v Battery

Started by Bret Cahill in sci.electronics.basics6 months ago 1 reply

The Fieri light runs on 4 rechargeable cells 2p X 2s. Just wire it so that the voltmeter always gets 8 volts less than the ebike battery.

The Fieri light runs on 4 rechargeable cells 2p X 2s. Just wire it so that the voltmeter always gets 8 volts less than the ebike battery.


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