TREE

Analog to Digital Converter (ADC): In this tutorial i will show how to convert analog values into digital, by using 887 (little bit differ with 877) , then display these digital value on LCD. The Analog-to-Digital Converter (ADC) allows conversion of an analog input signal to a 10-bit binary representation of that signal. This device uses analog inputs, which are multiplexed into a single sample and hold circuit. The output of the sample and hold is connected to the input of the converter. The converter generates a 10-bit binary result via successive approximation and stores the conversion result into the ADC result registers (ADRESL and ADRESH). The ADC voltage reference is software selectable to be either internally generated or externally supplied. ADC Configuration: When configuring and using the ADC the following functions must be considered: • Port configuration • Channel selection • ADC voltage reference selection • ADC conversion clock source • Interrupt control • Results forma...

Here is a very simple and easy to use audio amplifier using I.C BEL (Bharat electronics limited)1895 , a very common IC. This circuit can run on 3V to 6v , making it easy to use in pocket amplifier . Cost is under 25/- Parts list: BEL1895 I.C (DIP8), C1 = 470uF/10V, C2 = 1000uF/16V, C3 = 220uF/10V, C4 = 100uF/10V, C5 = 4.7uF/10V, C6 = 47pF, C7,C8 = 1uF, R1 = 47Ohm, R2 = 470Ohm, R3 = 100K, R4 = 1Ohm, R5 = 10K V/C, speaker, etc… Total cost is around 20-30 rupeess(INR) or 0.6USD.