Joule Thief: Tutorial: Basic JT Made From Recycled TV Parts
By request, a TKTutorial on making a simple Basic Joule Thief from parts scavenged from a discarded TV and a yard light and/or a CFL base. I only found a couple of transistor types…
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Extreme High Voltage: 15kV Supply Repaired and in Good Health
The 15kV supply that I popped a couple days ago is now repaired. I first disconnected the HV section’s primary from the driver transistors, and powered it up by simply hooking the Interstate F43…
Radiant Oscillator Circuit / Don Smith Part 7 B: One Minute Run Time NO Circuit 1 Farad Capacitor
2x 2n3055 npn bipolar transistors 2x ignition coils with no resistors -Test leads for connections -at least one 12vDC 3 watt led bulb -analog ammeter 0-5 amp (or 0-1Amp would work:) -12 volt battery…
Radiant Oscillator Circuit / Don Smith Part 7 A: One Minute Run Time WITH Circuit 1 Farad Capacitor
2x 2n3055 npn bipolar transistors 2x ignition coils with no resistors -Test leads for connections -at least one 12vDC 3 watt led bulb -analog ammeter 0-5 amp (or 0-1Amp would work:) -12 volt battery…
1.2V Retro Chip Oscillator
Using an old microchip, it’s possible to build a simple low voltage oscillator. In this case, i’m using an LM339N, a Quad Comparator. Looking at the datasheet, quite often an equivalent circuit diagram will…
flat coil BLDC motor III
just a short update as promised – 4 coils 4 mags motor and 4 mags generator’s rotor (with no “smart” coil yet) running from two transistors’ “driver” (actually there’s no driver – just two…
Joule Thief: Practical Application: Simple NPN Transistor Checker
The JT Basic circuit is used with a 1n914 (or 1n4148) diode in place of the Base Resistor. Cathode towards transistor Base. The circuit is the Basic 2n2222 or 2n3904 JT, available everywhere. the…
TROS – electrostatic
very sensitive single transistor oscillator running kind of an electrostatic Franklin bells; two transistors’ oscillator alt-lighting setup running 12V 85W headlight and 120V 60W halogen light; four transistors’ inverter 60Hz output
Don Smith Device Project Part 19: New Driver with L1 Tank Circuit
Testing out my new Variable Power and Variable Freq driver i built for the Smith project. I basically built a variable version of Don’s NST 🙂 Using a 555timer with added Lm393 to give…
Power Pill – 6 water powered oscillators
Description: 6x LED oscillators, running from the powered generated by 1 source of water. The top of a coffee jar has plain water in it and the electrodes, made of galvanized steel and copper…
