itnewsbot, to ReverseEngineering

Sketchy Logg Dogg Logging Robot Remote Control Hacking - When we last left [Wes] amidst the torn-open guts of his Logg Dogg logging robot, ... - https://hackaday.com/2024/02/20/sketchy-logg-dogg-logging-robot-remote-control-hacking/

itnewsbot, to random

MOSFETs — the Big Lie - How many terminals does a MOSFET have? Trick question since most have three leads,... - https://hackaday.com/2023/12/08/mosfets-the-big-lie/

bornach, to medicalcannabis
@bornach@fosstodon.org avatar

Testing an idea for how I might make use of my late brother's collection of tiny powerful

Using a salvaged battery gives the improvised electromagnet quite a kick when embedded in the strong magnetic field

555 timer IC configured as astable multivibrator on a yellow breadboard makes a red LED flash briefly once every couple seconds. The 555 output switches a IRLZ44N MOSFET that energizes a hand wound coil of magnet wire that has been glued to a cardboard flap attached to the inside of a cardboard box that is open on one end. There are a pair of N42 Ni-Cu-Ni magnets taped to the box on either side of the flap. The coil repeatedly raises the flap from the bottom edge of the box opening to the top edge. The 555 circuit is powered by 4 AA batteries and the electromagnetic coil and MOSFET are powered by a Lithium Polymer battery salvaged from a vale device

bornach,
@bornach@fosstodon.org avatar

I made a flapping butterfly actuated by a hand wound coil of magnet wire in a strong magnetic field.

After destroying one 555 timer IC (probably by a high voltage inductive spike) I decided to incorporate a PC817 in the driver circuit.

A paper butterfly on a hobby cutting mat flaps its wings. It is actuated by a MOSFET switching current from an 18650 lithium ion battery. A 555 timer configured as an astable multivibrator sends control signals via an optoisolator

bornach,
@bornach@fosstodon.org avatar

A sends signals to the optoisolated gate driver, unaffected by the higher voltages involved in pulsing current through a coil of magnet wire which causes the paper heart to beat.

itnewsbot, to amateurradio

Spy Radio Setup Gets a Tiny Power Supply for Field Operations - [Helge Fyske (LA6NCA)] may not be an actual spy — then again, he may be; if he’s g... - https://hackaday.com/2023/06/29/spy-radio-setup-gets-a-tiny-power-supply-for-field-operations/ -m

itnewsbot, to random

Linear Power Supply’s Current Limiter is a Lesson in Simplicity - Here at Hackaday we really like to feature projects that push the limits of what’s... - https://hackaday.com/2023/06/05/linear-power-supplys-current-limiter-is-a-lesson-in-simplicity/

itnewsbot, to random

Op-Amp Challenge: MOSFETs Make This Discrete Op Amp Tick - When it comes to our analog designs, op-amps tend to be just another jellybean par... - https://hackaday.com/2023/05/20/op-amp-challenge-mosfets-make-this-discrete-op-amp-tick/ -amp

itnewsbot, to random

Hackaday Links: May 14, 2023 - It’s been a while since we heard from Dmitry Rogozin, the always-entertaining form... - https://hackaday.com/2023/05/14/hackaday-links-may-14-2023/ #hackadaycolumns #hackadaylinks #teardown2023 #billhammack #flashmemory #moonlanding #floatgate #magnetron #neolithic #roscosmos #electron #apollo #markus #mosfet #ikea #esd #usb

itnewsbot, to random

FET: The Friendly Efficient Transistor - If you ever work with a circuit that controls a decent amount of current, you will... - https://hackaday.com/2023/04/25/fet-the-friendly-efficient-transistor/ -to

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