Simple homemade oscilloscopes are not all that difficult to design and build. I have studied various designs dating back to the thirties and had an interest in developing a simple oscilloscope that the electronics hobbyist could build with readily available parts today. The first oscilloscope I ever built from scratch is the Tube Version shown aft
Click here to download the full size of the above Circuit.
er this Solid-State version on this webpage. I experimented with some solid-state designs and came up with a design shown in the schematic below. The schematic design is for a XYZ scope capable of supporting the Dutchtronix scope clock with sharp graphics and also the Version 2 TV-to-Scope converter. The Z axis design is very simple and turns the CRT grid on/off briefly. It works well with the Dutchtronix clock Z axis output and alright with NTSC video. The Z axis circuitry is definitely an area for future improvement. Before powering up the circuit for the first time, make sure the ASTIG and FOCUS pots are centered, and the INTEN pot rotated all the way towards the negative polarity of the 2. 2uF capacitor for maximum brightness. Without any inputs connected, power up the scope and adjust the X and Y position pots until a dot appears in the center of the screen, and then adjust the FOCUS pot until the dot is as sharp as possible and about 1mm in diameter. Afterwards, adjust the ASTIG pot until the dot is as round as possible, and then finally readjust all other controls to your liking. Rather than using voltage doublers directly on the mains supply like my Version 3 XY scope design, I opted to use a power transformer for isolation safety and simplicity. I personally hate power transformers because they are large, heavy, and require special considerations when placed near an electrostatic CRT. I would have opted for a...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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