hobbyist's Blog

This video is the final episode of this fabricating build, it is the demonstration of the new saddle working in conjunction with the shop made LED lamp, and shop made miniature positioning table, to make a printed circuit board drilling center. Thankyou for watching the series. Have fun in the...

This video is the start of taking the protoboard build, and converting it to printed circuit build, I show the process I take to fabricate my own circuit boards, I haven't done this in at least 10-15 years ago, so I had to refresh my memory on how to do this work. I fabbed, 4 boards, and was...

In this design, I am traversing away from the classical method of building the BCD counter, where traditionally the flip flops are synchroneously clocked, in my design I'm synchroneously applying clock pulses to an array of logic gates at the decoder circuitry instead. With this design it can...

This concludes the series of SCR flip flop design, This part gets into more intense detail of why the circuit later gave some very erratic outputs under certain input conditions, and how again I systematicallly worked through it to determine the cause and how to apply the fix, for it to finally...

This is the first part of the process I go through in designing a new circuit, since I am not a professional in this field, I cannot make the claim that this is the way to design circuits, so I can only share my methodology of designing circuits at a hobby level. The method I came up with is in...

This is part 1 of the design process I use, to design new circuits from scratch, I show the conceptual details of the circuit in its simplistic block diag. form, then I show later how, the original design needs to be reworked with added circuitry to make it work properly. Part 2 coming up...

This is a robotics project I designed and built about 20-30 years ago, it is based on the old radio shack robotics gripper robot, I didn't want to spend money on buying one. So because I enjoy engineering things, I decided to take up the challenge to design and build my own version, using all...

Hi, This is the design and build of the binary to decimal decoder, it is fully functional, and this video demonstrates the working of it, showing the workings from the toggle registers, through the binary outputs, and finally into the decoded outputs, showing the digital outputs from 8...

OK in this video, a lot of progress is being made, I just learned about synchroneous counters, reading through my books and doing research on binary up/down counters, and in this video I share what I learned and how to implement steering circuitry (logic gating) to acquire the abiity to count in...

Quick video explaining how and why I upgraded my design of a data flip flop forming a ripple counter, to a set of JK flip flops forming a synchroneous binary counter. This design uses one less transistor, bringing the total count per register down to 9 transistors now. And it works reliably.

this video is a continuation of the master slave flip flop series, this is demonstrating how to take the basic circuits, already built, and how to configure them by manually placing jumper wires at certain locations in the circuitry, to perform the toggle functions. Then I go on to show how...

This is an upgraded version of the "AND" gate configuration, that goes into these m-s flip flops, the old version used two transistors, this new design uses only one transistor, its bias is different as well, originally the old flip flops contained fourteen transistors, with this new upgrade...

This is the conclusion of the Master slave flip flop build project, using all discreet components, this video demonstrates the ability for these type of registers to be couple together in such a way that makes them into a binary counter. From here the next project may be to design and build a...

Hello, Here is a sneak preview, of the set up of four master slave data registers, for this series of videos I'm doing demonstrating the design and build of these kind of circuits. In this video the LED's outputs are scattered over the breadboard as they are connected close to there mating...

Hi everyone, as you know I like to share this transistor circuit design stuff with people who are interested in this at a basic level. As I am not a professional in this by only a hobbyist, however I like to share what I learn from my design builds. As a hobbyist only, my designs are only at...

This is a tutorial to build a transistorized light detector, it is assumed that a person choosing to build this circuit, has a basic understanding of electronics fundamentals, and are familiar with the basic theorems such as (ohms law, kirchoffs voltage and current laws, ect..) that way the...

I will put the schematic at the very top and bottom to make it easy to navigate to when reading through the tutorial from top to bottom of the page. also a short video of this circuit is shown at the bottom link. from Data books LED is established as 2V @ 30 mA. Since this is a tutorial...

Hi, This is a continuation of the original squarewave to triangle wave in the series of designing a PWM circuit using all discreet components http://www.youtube.com/v/KnFV7qTVJB0?hl=en&fs=1 This video shows how the amplified triangle wave is fed into the volt. level detector circuit...

It is easier to explain on the video, http://www.youtube.com/embed/PmplS1mcFqI than to write it all out.

This is a quick design of a light tracking circuit, The video of it: And Here is the schematic of it: it is a test circuit running a 5v. motor, when the light hits the left CDS cell the motor spins leftward, and the right CDS cell causes the motor to spin rightward, when no direct light...