Miniature Vacuum Tube Tesla Coil
Vacuum tube tesla coils operate in a continuous wave mode of operation, continuously providing energy to the tesla coil secondary. As a result, the output is pr...
Vacuum tube tesla coil (VTTC) using Russian GI-30
A nice and compact setup, that works off-line, directly at 220V, with only a voltage doubler to get the plate voltage up to 560V DC. I don`t need to go into det...
Circuit operation explanation of astable multivibrator
It doesn`t break if being little even if it crosses the value of the input/output electric current characteristic. It breaks when short-circuiting and doing the...
Sine wave oscillator
The Wien bridge sine wave oscillator to introduce is the oscillator which works in the oscillation by returning(positive feedback) the oscillation output to the...
Square wave oscillator
By the hysteresis characteristic, the voltage which becomes the H level with the input voltage of the inverter rising from 0 V (Voltage that the output becomes ...
pulse generator circuit
With the relaxation oscillator, we basically achieved a fairly regular square wave. Let's change the duty cycle (and visualize the effect with LEDs). Wire up ...
Super Oscillator Conversion
The first thing to do is to take notes indicating which wire connects where on the 36 tube socket. Remove all of the wires connected to the 36 tube socket. Then...
ujt triggering circuit
A unijunction transistor (UJT) is an electronic semiconductor device that has only one junction. The UJT has three terminals: an emitter (E) and two bases (B1 a...
LOW frequency square wave oscillator circuit
A real simple circuit that I can make that will give me the same inverted square wave the inventor is using The inventor calls out the setup he used on his funt...
low frequency square wave oscillator circuit
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Joule Ringer
The nicety of air coils: one can build them at home rather easily and they seem to swing at a higher inaudible frequency above 100 KHz. May be the frequency com...
Handheld Oscilloscope Oscillator Circuit
The circuit in the schematic below is an infrared transmitter. The infrared beam is transmitted in a nearly line-of-sight pattern to another device with an infr...
Solid State Tesla Coil
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Tesl coil design
Tesla coils are air-core, resonant transformers. Working at high frequencies, they can generate tremendous voltages with spectacular lightning-like discharges. ...
Hewlett-Packard HP-200C audio oscillator
After repairing a couple of Hewlett Packard vacuum tube voltmeters, I read up on some of the company history. I was able to locate a HP-200C oscillator. This HP...
Oscillators
Those variations, (in effect an alternating signal), will be passed via the coupling capacitor to the next stage - shown by the arrow to the right. We can repla...
PWM Generator
Using a triangle wave and a comparator, a pulse-width modulated signal can be created. We will use the DAC as our input signal and the resulting output signal w...
Sawtooth generator circuit
To get the best from an NBTV signal it is important to use the full dynamic range of the signal with no crushing at black level or peak white. To check the line...
Multivibrator
A multivibrator is an electronic circuit used to implement a variety of simple two-state systems such as oscillators, timers and flip-flops. The most common for...
Hartley oscillator
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