Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Checking The Time is Easier Than Ever Before!

There are many digital alarm clocks that available in the market, but most of the digital alarm clocks are only have a single time local time feature, where you’re going to spend more money out from your wallet, if you want to have dual time digital alarm clock! Well, if you choose not to buy the digital alarm clock, then would you interested to develop a dual time digital alarm clock here? The microcontroller that you’re about to use is the PIC16F873A, where this PIC used is a 28 pin high performance RISC microcontroller from Microchip Inc and it having a 4K byte program memory. One of the main reasons why you should use PIC16F873A, because it is a flash based and a member of PIC16F873A family of low cost, CMOS, fully static, 8 bit microcontroller. The best part about this PIC is it requires less external components, hence it can reduce great sum of cost and total power consumption. By the way, this Dual time digital alarm clock can easily be set according to your own need, in either… Continue reading

DIY an Autorange Capacitance Meter!

Sometimes, it’s hard to find the suitable capacitance meter, especially those that in the autorange version. Instead of searching it all over the places, it’s better to develop one for your own use! Today, you’ll learn how to DIY an autorange capacitance meter! Since it’s in the autorange version, this also means it doesn’t need to adjust the range settings anymore! Moreover, the measuring range for this autorange capacitance meter is quite large as well, where it ranges from 5 pF all the way to 2600 uF. Don’t worry about the range, as it’s all taken care of by the PIC16F873A inside the circuit. This project is based on a very simple circuit analysis principle of charging and discharging of capacitors in an RC circuit. Thus, the further components are not needed for complicated the task! Basically, the capacitance meter is beginning by fully discharging the capacitor. After that, it will charge and waits until the voltage across the capacitor reaches 0.632 Vcc. Then, the time will be captured and the capacitance is computed using ‘Tau = RC’ formula. The… Continue reading