Seeedstudio Fusion Vs Elecrow Vs JLCPCB

I have been building these small projects for quite some time now and used a lot of PCB building services. Professionally made PCBs brings in a lot of advantages, the one I like most is that I don’t have to get rid of the etching solution after – oh I have to mention the silkscreen and solder mask finish that you won’t get from DIY PCBs. The professionally build PCBs generally performs better than DIY PCBs. I have used these services in the past – let’s look at them in detail and see which service you should apply for your next project. The first part that we should look at is the order screen and the options they offer. Most DIY projects would only go two layers but for those… Continue reading

The Colorful Mechanically Scanned LED Display

Is anyone here a big fan of the propeller clocks? Isn’t the logo that flashed out from the high spinning propeller clock fascinated and mesmerized your heart? So, what do you say? Do you want to build a mechanically scanned LED Display, which is having the same effect as the propeller clock did? Sounds interesting, isn’t it? Well, the PCB is the main part of this project. It contains: The PIC microcontroller, Four HC573 latches, Five ULN2003A 7-fold darlingtons, A power supply stuff, A MOSFET (It is to drive the first motor) Two push buttons (They are for setting the date and time). Beside that, you need to use an LM317 adjustable voltage regulator for LED brightness control. Also, make sure that the main power supply should be at least… Continue reading

The Finest Combination of LCD and USB – LCD2USB!

Most of you here were very familiar with the LCD and USB in your daily life, but have you ever thought to combine these two different components into a cooler gadget? Yep, the gadget that you’re going to develop is LCD2USB! This LCD2USB is an open source project, and the main goal of LCD2USB is to connect HDD44780 based text LCD displays to various PCs via USB. The advantage of this LCD2USB is very cheap and easy to be developed. Since the project is based on the Atmel AVR Mega8 CPU, hence it doesn’t require any difficult to obtain parts, such as the separate USB controllers. The total cost without display and PCB are less than $10, which it is extremely cheap if you comparing with those on market! Furthermore,… Continue reading

The Atmel STK500 EVB – The Marvelous Component For Arduino Development Board!

The Atmel STK500 EVB is one of the most incredible starter kit development system features ISP and high voltage programming (HVP) for all AVR devices, which it can be either directly or through extension boards. Most of the time, the board is fitted with DIP sockets for all AVRs that available in DIP packages! Today, you’ll have the opportunity to see and learn how to configure an Atmel STK500 as an Arduino-based development system board. You must be wondered, “Why you have to use the STK500 instead of a real Arduino PCB?” Well, no one said you could not use it here, unless you already had it and the board carries eight switches, eight LEDs and a variable, software programmable AREF voltage as well as a variable power supply! When… Continue reading

DIY a Dual Trace Scope By Your Own and Save Enormous of Money!

As we all knew that the currently worldwide economy has been moved in the downward position and most of the countries all around the globe have been seriously affected by this economy crisis. It’s getting hard and harder to earn our living and that’s why you should learn how to save as much of money as you can! However, some of you may think that it’s easier to be said than done… Well, guessed what! Would you believe if you could develop the cheapest dual trace scope with a cost less than $8 per unit? It seems unbelievable but this is the fact! For your information, this submini USB dual trace scope is based on Atmel Tiny45 CPU and it’s a homemade PCB. It has two analog inputs and can… Continue reading

DIY a Rapid AVR Prototype Programmer in Less Than an Hour!

Do you ever faced this type of experience before, where you need to bent the pin on a microcontroller and by the same time, you’re trying to insert it into a DIP programming socket? Isn’t this really messed you off? Beside that, can you imagine that you need to align those crazy pins repeatedly and intermittently prying them out of the programming socket, and then inserting the freshly burned chip into a target circuit, this whole process will definitely wasting you a lot of sleepless night! Well, here is a good method that can help you overcome the bent pin nightmare, and this tool only cost you less than $35! These PCBs are manufactured in the low-cost way so it can become alternatives to the conventional Arduino workhorse controller boards.… Continue reading