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R.C Coupled Amplifier The below fig shows a two stage R.C coupled amplifier. Here the first stage is connected to the second stage through the coupling capacitor C C and resistor R C . Therefore, this amplifier is called as RC coupled amplifier. The resistor R 1 , R 2 from the self bias and R E form stabilization network. The emitter bypass capacitor offers low reactance path to the signal. This method of coupling is widely used in cascade amplifier stages. Working: When the input voltage is applied to the base of the first transistor through a input capacitor C IN , it appearing the amplified form across its collector load R C . The output of the first stage is given to the vase of the next stage through coupling capacitor C C . The second stage does further amplification of the signal. The coupling capacitor here, helps in blocking the flow of d.c. components from first stage to the second stage. Thus the biasing of the second stage will not disturbed. The coupling capacitor have so...

Here’s a blog post that will show you the setup you’ll need to make your own do-it-yourself radio controlled (RC) tankbot from the ground up. This example uses a few kits from Solarbotics to build your own RC controller, communication link, and tankbot using minimal parts. We even managed to get 250 feet of range out of the deal! For this exploit we invite you to move over to the dark side, as the heart of the project isn’t Xbees but instead 2.4GHz IEEE 802.15.4 Radio Frequency Network modules from Synapse Wireless which are actually super simple to use and configure. This post will merely get you started with building a general RC platform, feel free to modify/hack the system to suite your own diabolical requirements.