Retro Prototyping, Great for Teaching

Retro Prototyping, Great for Teaching

“Have you ever wondered where the term “Breadboard” came from? Here’s an example of what breadboards were all about. In the early days of electronics, components were large and cumbersome. They didn’t have transistors or integrated circuits, only vacuum tubes. So it was common practice to build prototype circuits on a block of wood using nails or screws …

more ...


Retro Electronics: DIY Resistor-Transistor Logic Gates

Retro Electronics: DIY Resistor-Transistor Logic Gates

“We all love our modern devices ranging from smartphones to smart cars and all of it is made possible thanks to the transistor! The technology we use has only been around for a few decades, so how did engineers in the past create complex digital circuits? This also brings up the question “how did NASA build a computer that was …

more ...


Easy Way to Make a Powerful Joule Thief

Easy Way to Make a Powerful Joule Thief

“Hey nice to see you again guys! Now I’m back with another instructable. I shall teach you how to make a diy joule thief. This is one of the easiest way to make a joule thief and the most powerful one. For those who don’t know what a joule thief is, it’s a small circuit that is …

more ...

How to make FM transmitter

How to make FM transmitter

“A short range FM transmitter is a low-power FM radio transmitter that broadcasts a signal from a portable audio device (such as an MP3 player) to a standard FM radio. Most of these transmitters plug into the device’s headphone jack and then broadcast the signal over an FM broadcast band frequency, so that it can be picked up by …

more ...


Joule Thief With Ultra Simple Control of Light Output

Joule Thief With Ultra Simple Control of Light Output

“The Joule Thief circuit is an excellent entrée for the novice electronic experimenter and has been reproduced countless times, indeed a Google search yields 245000 hits! By far the most frequently encountered circuit is that shown in Step 1 below which is incredibly simple consisting of four basic components but there is a price to be paid for this simplicity …

more ...

The Ultimate FM Transmitter (Long Range Spybug)

The Ultimate FM Transmitter (Long Range Spybug)

“Have you ever wanted to broadcast your own radio station within your neighborhood? Ever get curious on where people get those “Surveillance Bugs” from spy and action movies? This small and simple FM transmitter is the toy that geeks have always wanted. FM transmitters can be complicated to build, that’s why I’m teaching you how to make a …

more ...

LM741 Op Amp on a Breadboard

LM741 Op Amp on a Breadboard

“This is an LM741 op-amp built on a breadboard. The LM741 op-amp is an 8 pin IC chip, but I thought it would be fun to build my own on a breadboard. There are four sections to the chip, it will be built on four Adafruit Perma Proto boards. The design is from an open source kit from Evil Mad …

more ...

DIY Floppy Drive Piano (Floppiano)

DIY Floppy Drive Piano (Floppiano)

“There are many Instructables and videos on the internet showing how to build a musical floppy drive, but I have never seen anything about building a floppy drive piano. Because I like playing the piano and building electronics, I figured that building a Floppy drive piano would be the perfect project. This Instructable will show you how you can build …

more ...

Simple FM transmitter

Simple FM transmitter

Today we will build a circuit to create a very simple FM transmitter. This circuit like others is well publicized on the Internet and presents a very simple configuration since it only uses an NPN Transistor. Note that this circuit was assembled on a veroboard because it will not work very well on Breadboard. The Circuit uses what is called …

more ...