Change a Micro Ampere meter (say 50 or 100 uA) into a 1-10 Amp meter and calibrate it (demo & VLOG)

First & new idea to make a circuit that can measure high inductance coils, more in the description

Easy to make cable stripper to harvest wires out of shielded computer cables and other cables (demo)

No electronics, but preparing a German Schnitzel: an idea because spring is coming (Netherlands)

Peltier Element: My first experiments & ideas, using it for cooling or as an electric source (demo)

Talking about 1 transistor oscillators, working between say 300 KC and 1.6 MC (demo & schematics)

Talking about resistors in electronics: first ideas to take in account: wattage, voltage drop, etc.

Old radio and electronic schematics of the 1970s that are still actual today 2025 and will always be

Bluetooth audio receiver with a long life rechargeable battery. Home made with demo & schematic

1 transistor Mini transmitter for the AM band 800 KC - 1600 KC: issues and considerations (VLOG)

Silly video talking about gravitational waves out of the cosmos. Circuits to detect them?

The Weller Magnastat soldering iron part 2: Temperature time delay unit with schematic & demo

The Weller Magnastat soldering iron, its principles explained and more ideas part 1 (WTCP-S)

Mini AM radio transmitter kit from Ali Express: here a good power supply for it (schematic and demo)

Mini AM transmitter kit for 800 KC - 1600 KC from Ali Express, tested & some conclusions

Mini AM transmitter in the 800 KC range, via which you can play e.g. MP 3 music files (tel. etc).

Micro balance weighing via capacitive effects on a 6000000 Hertz crystal, proof of princip. experim.

Cheap and simple vacuum pump sucks water out of a filtered substance (e.g. coffee filter) demo/more

Cheap and easy microbalance second experiment: using a 6 MC quartz crystal oscillator schem/demo

Cheap and easy Micro Balance that can weigh substances below 1 gram with oscillator & freq. counter

Copper & Iron electrode in cement/concrete with NaCl form a battery of 0.4 Volt and 26 uA when wet

Thumb through a 1950s book of atomic energy with many essentials, e.g. the Millikan exp. & more

Old Dutch Radio book of 1937 (thumb through) & in the end some beautiful old radio tech pictures

Old Dutch Radio book of 1926 - 1928: thumbing through it and show 1 triode radios/tuning capacitors

About galvanic batteries. An experiment. Make a 1 Volt Cu-Alu cell with NaOH sol. as electrolyt pt 1

3 transistors, a "touch contact" or a button switch and timer for x minutes or 1.5 hour (schem/demo)

Driving a powerful LED made with 10 Red LEDs paralleled and talking about its Duty Cycle: schem/demo

YX 8018 joule thief Chip. I was trying to amplify the LED output via a transistor, more info in text

Small talk about the YX 8018, a joule thief chip made to drive LEDS on a tiny voltage schem & demo

Motor of a discarded analog time clock (230 V-50 Hz & 110 V-60 Hz) can be reused for fun etc. (demo)

Constant Current Source with 7805 drives a Green or Red LED between 5 V and 40 Volt, constant 7.5 mA

Clock and Sound audio generator with NE5532 and HEF 4040 demo Pt 2, can be used in a synthesizer

Clock/Sound generator 3 Hz - 45 KC with a NE 5532 P driving a HEF 4040 freq. divider Chip, Pt 1

Carbon - Aluminum Battery, with NaCl (=kitchen salt) as an electrolytic fluid, demo/setup/results

Cleaning old oxidized radio (and audio amplifier) switches (1950's - 2000's e.v.) in ultrasonic bath

Trying to burn out a 2N3055 NPN Silicon transistor: does it work? Setup test schematic and demo

Voltage suppy 0-30 Volt max 2 Ampère, where the LM317 regulator directly drives a 2N3055 schem/demo

2N3055 used to make a HQ stabilzed Voltage supply 1-4 Amp. on 12.2 Volt out with a 7812 schem/demo

About the 2N3055: the Work Horse in all the BJT Power Transistors, showing insight about its use

Power supply with a 7812 that can be adapted to a higher output voltage via a diode & driving CMOS

Simple CLOCK circuit to drive dig. CMOS Chips via a MUVIB, works from 4 Hz - 10 KC demo & schematic

HEF 4040 counter Chip now working in a stable way and a simple clock unit (astable muvib) Exp. 3

HEF 4040 experiment 2: driving it with a normal clock signal & see its outputs via pin 1-11 (logic?)

HEF 4040 experiment 1: test how to drive it. A piece of wire as antenna on the clock input & more

Doing experiments with the HEF4040 chip & talking about home made breadboards, part 2 (idea's)

Doing experiments with the HEF 4040 Chip & talking about home made breadboards, part 1 (ideas)

Tester to match transistors PNP or NPN or PNPs compared to NPNs schematic and follow up = Part 2

Tester to match transistors PNP or NPN & PNPs compared to NPNs : explanation and schematic, part 1

Reversed polarity indicator for DC, working between 6 Volt and 40 Volt demo and schematic

Class A 150 - 300 mW audio amplifier, definite schematic & demo, works only on 5 V at 120 mA

Finding out a 0.5 Watt Class A audio amplifier, how does that work? Experiment, schem. & explanation

TPA3116 Chip tested: 2x50 W audio, USB and Card audio in, LS out, line out, bluetoo & remote control

Two too simple 150 mW class A audio amps with 2 transistors, usable on 3 Volt at 125 mA constant

Charge a NiCad pack of 4 cells to 5 Volt. Basic circuit for AC/DC & about the basics of charging

Precision potentiometer (precise to 1 Millivolt). Schematic with 3 of them used, to do that job

TDA 2615 audio Chip amp 2 x 6 Watt max. from Philips, pure Hi Fi, datasheet & links how to make it

Field Effect Transistor tester for small signal FETS and MOSFETS, via the oscillation principle

The MC 34063 A tested as STEP UP converter DC to DC schematic and demo (low to higher DC voltage)

The MC 34063A (DC to DC up/down) Buck Converter Chip from Texas Instruments tested (schem/demo)

The Astabile Multivibrator can always fool you (happy flickering Christmas lights) schem/demo