15:25
TRF Radio for the low Shortwave bands (AM). Can it work? Yes during evening night demo and schematic
15:44
TRF Radio for Medium Wave (AM) around 1395 KC. Demo and schematic, part 1
13:17
Principles of a TRF Radio showed and explained. VLOG and demonstration of a working radio on 2-3 MC
09:05
555 Chip oscillator (square wave) with a variable duty cycle 10Hz - 4KC or higher demo & schematic
10:04
Talking about old school European BJT transistors and the ones now 2025 bought via Ali/China (VLOG)
07:16
Minimum components RED LED flasher on 3 Volt: demo and schematic
14:07
Analog "Egg" timer for say 7 minutes with an alarm. Works on 3 Volt or higher (demo and schematic)
09:25
Do not invest thousands Euros/Dollars in a 1-10 Kilowatt home batt. system when not enough sunlight
09:43
Test radio coils 70 KC (or lower) to 650 KC with this 10 cents Chip:the Q5252F LED driver demo/schem
08:08
Square Wave oscillator (Muvib) with 2 FETS (BF 256 b) gives x minutes to 28 KC demo & schematic
09:42
NE 5532P oscillator chip drives a discharge lamp via a NPN Darlington on 6 KC. Demo/Schematic/More.
01:04
Lecher Line experiment 2. With a BD 140 (PNP) working now on 143 MC, though at 24 Volt (demo)
06:22
Lecher Line demonstration with a test oscillator working on 60 MC-117 MC, schematic and setup showed
12:24
BD 140 transistor works as a HF oscillator 55 MC-110 MC experiment. Circuit, say usable as dipmeter
06:54
My garden on 22 july 2025. Tried to dry Oregano leaves & some more information about hobby gardening
11:18
How to connect a digital Ali Chinese VA meter to measure voltages higher than 30 Volt & more info
16:24
Shortcut protected power supply for 45 Volt, max. 1 Ampère, schematic and more (VLOG 1)
13:33
Current regulator schematic made with 2 HV NPN transistors MJ18004, shortcut prot via halogen lamps
08:54
Contact resistances in a switch, that was told to be made for 230 V AC at 15 Ampère, bought via Ali
08:42
Analog timer 3 stage Darlington to switch a 24 V solar inverter off after 1 to 1.5 hour (schematic)
14:48
Solar panel 48 Volt 4-6 Ampère MOSFET (SSH6N80) lead acid battery charger, schematic and more info
12:32
About the properties of a charger to serve a 24 Volt lead acid battery in a solar energy system VLOG
10:07
No need to invest 4000 to 6000 Euros/Dollars into a "home battery", system. Keep it simple (VLOG)
03:06
Harddisk opened to see what is inside (demo). Head for read & write bits via magnetostriction
03:54
My garden on 31 May 2025 in the Netherlands: about black lice and EU ideas and regulations (textbox)
14:13
5 Watt Audio Amplifier made with MOSFETS: audio demo & schematic & some key information about audio
05:26
8 Watt Audio amp made with P & N MOSFETS, talking about biasing and more (only VLOG, no schematic)
08:22
Simple construction technique for electronics hobby: the brass nail method on well varnished plywood
13:28
Double power supply 2 x 18 Volt at 500 mA with very low hum, useful for audio amps (demo schematic)
03:16
Shortcut protection for series regulator power supplies (e.g with 3055 or 2955) via automotive lamps
12:39
How to make a double power supply for audio amplifiers, a VLOG with idea's & good practice & tips
06:13
How to change a 50-500 Micro ampère meter into a 1 or 5 Ampère meter, via a shunt demo and schematic
14:49
2 Watt audio amplifier, class B, made with the LM 49600, does it also have 0.0003 % distortion?
10:48
The LME 49600: a HiFi Audio Opamp for 0,5 Watt output with 0,0003 % distortion, schematic and demo
08:51
Testing the LM3914 Chip (dot or bargraph LED driver for 10 LEDS, 10 x comparator), schem. and demo
13:17
10 Watt classical Audio amplifier made with the TL 071 CP Opamp, working now on 20 Volt demo/schem
15:57
Commodore PC 1 monitor (not graphics) model type 1402 from 1986 repaired and more (schematic)
03:49
Old DOS computers of the 1980s and more, part 2, writing a program for random syllabes or genes?
12:26
Old DOS computers of the 1980s and their games and programs, part 1 (demo and more)
15:18
10 Watt Audio Amplifier, developed with the 741 Chip, sound demonstration and schematic
14:14
How I developed (= how to make) a classical 15 Watt audio amplifier with a 741 Opamp, part 2
14:42
How I developed (= how to make) a classic 15 Watt audio amplifier with a 741 Opamp, part 1
05:16
Something about the "double cone" loudspeaker, it worked for say 30 years & more info about it
13:32
The Viddeleer tone control 1945-1955 made with 2 inductors: revisited and transistorized schem/demo
04:43
Can a solution of dried tobacco leaves in water fight lice in the garden? Yes, read the comments
03:05
Food dryer used in the spring for drying Sellery and Parsley leaves. Spint insects were a problem
09:18
Do not throw away old solar panels, they can last for 30 or more years (demo & more, in description)
02:17
No garlic cloves this year (2025) but perhaps I can make garlic powder via the food dryer (demo)
07:32
Make a bicycle headlight with 3 white LEDS, suitable to work with a 6 V AC dynamo
13:34
Radio reception in the Very Low Frequenc band, say 1 KC - 500 KC via a converter TBA 120 to e.g 8 MC
10:32
Anti Hum filter with 2 electrolytics and resistor: useful for sensitive audio or radio circuits, but
04:58
Two BLUE LED's with different properties, connected to the same voltage source, how to do that?
07:54
My garden on 16 April 2025: information about it and more (a very dry March in Netherlands, 2025)
08:14
Repairing a bicycle dynamo made for 6 V - 3 Watt, testing it with Red and Blue LED's and more (demo)
10:35
Monostabile Muvib (Latch circuit) with 4 transistors drives a 12 V relay via 1 touch (schem/demo)
05:15
Repairing a Chinese "wind up" lantern by replacing its Li ion battery of say 3.7 Volt (how it works)
04:33
Acoustic switch made with an audio pre-amp and a 2 transistor time delay unit (demo and schematic)
09:22
Simple transistor tester for NPN and PNP Bipolar Junction transistor types: demo and schematic
16:58
The young electrician: Dutch book of the 1950s
17:25
Thumb trough "der Praktische Funkamateur" (the practical radio amateur), issued in 1964 in the DDR
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