02:34

TV with vacuum tubes

02:37

Voltage converter from 1.2V from a Wireless Computer Mouse.Chip 2108A

05:55

SPD chip in RAM. What happens if you remove it?

03:46

GVDA GD189.Finds radiation from radio transmitter and telephone

03:00

ICS501M.This is a frequency multiplier chip up to 160MHz

04:35

Andonstar ad409pro.Digital microscope with video endoscope and wi-fi video transmission

03:00

How to make a flyback converter correctly

03:02

Synchronous rectifier or Schottky diode Which one is more efficient

01:30

RF probe on diodes for testing walkie talkies

01:42

How to transmit sound using a carbon microphone

01:38

Reverse engineering of a high voltage generator using a single transistor

01:30

Electric brake for electric motor on relay and button

02:47

How to make a short dual-band antenna for a walkie-talkie

02:48

How to make an antenna LC- filter and get rid of interference

03:26

PAM8403. D-class amplifier. How to make an LC filter for it

04:13

Vacuum fluorescent display. How to check it with a battery

01:42

How to make an adjustable power supply from a charger

02:40

What are quartz watches made of

02:42

DSB radio transmitter at 27 MHz on sa612a chip

03:14

Battery capacity tester HW 586

02:31

800 MHz radio transmitter from a VCR modulator on a cxa1733m chip

06:57

Multimeter with oscilloscope Tooltop et828pro.Checking operation

04:04

How to make a transformer for a short wave antenna

02:34

USB battery tester KWS-V20 with a measurement error of about 3%

03:13

LC low pass filter on green ferrite rings

01:39

delay line in electronics. How it works

01:46

If you remove the protection board from 3.7V mini batteries, they become powerful

05:55

Fnirsi swm-10.Portable spot welding. Checking operation

01:29

How to properly look for hidden wiring in the wall

03:02

How to make a fluorescent light from a monitor inverter board

02:31

LED flashlight with buttons from a selfie lamp

02:53

How to test wireless charger

03:55

Heat pipe from a computer. How it works

04:04

FM transmitter on a dual-gate MOSFET BF966

02:33

AM transmitter made from a homemade zinc oxide semiconductor

00:52

Why do you need a “ball” in a fuse

01:43

Why is one turn of foil needed on a transformer?

02:02

Why do they make a "snake" conductor on the PCB

04:23

In-phase and anti-phase connection of transformer windings

06:11

XGecu T48 programmer. How to program tens of thousands of chips and test logic chips

02:15

What is the spring in the fuse used for

01:47

SIM card under a microscope. What is inside

03:11

How to make a Levitron on a Hall sensor

03:43

How does a Hall sensor work

02:20

A simple laser level made from a laser pointer and a printer laser unit

02:04

Electricity generator from a stepper motor

02:27

Why connect the coil to the antenna

02:02

How does a barcode scanner work

02:10

What can be seen with an ultraviolet LED

01:40

A high-voltage fluorescent lamp shines from a Baofeng UV82 walkie-talkie

02:30

How to Easily Increase the Range of Baofeng Walkie Talkie

02:57

What does a drone consist of

08:07

Super RM RockMite QRP transceiver.How to assemble and configure

03:53

Bside s30 multimeter with li-ion and infrared temperature sensor

02:05

FM radio receiver on a CD2003GP (TA2003) chip with electronic tuning using varicaps

04:42

DIY SSB radio transmitter. Range 2500 km

02:06

How an RC circuit changes phase by 90 degrees

02:48

Series RC circuit.How to slow down the charge of a capacitor

03:38

Replacing the magnetron in a microwave oven

04:05

RX2 TX2 chips. How to transmit five commands in different ways