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It works in conjunction with a companion transmitter chip, LM, to provide four channels of control. So, there is not real schematics, but only programming examples. Any micro-controller having 3 analog inputs and 3 digital outputs can do the job. Even though it makes my job much easier, I would also prefer to be making the whole circuit without using an IC that does everything for me: Sorry if this is a newbie question, which it probably is.

May 04, I’ve been searching for many hours and have yet to come upon any feasible circuits. Sign up now to remove ads between posts. Some of those may have operated at 27mhz. Last edited by whitecrest; May 04, at The chip does a lot, but you still need to provide support circuitry to complete a project.

Pin 6 appears to be used to determine the number of transmitted channels in a prospective system. Does it even matter what value they are? The Arduino boards can also do that. Even using the IC, it should provide plenty to do. If you must use discrete components, look up some old Heathkit radio control circuits.


Return to DIY Electronics. Images View all Images in thread. Welcome to the forum. I have no idea what the values of B1, B2 or Dattasheet are, nor is it mentioned anywhere on the website the image came from. Originally Posted by Magranon. Looking for 3 channel circuit diagram.

I’m assuming this forum is the right place to ask these kinds of questions, but if it isn’t I apologize. Files View all Files in thread.

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Yeah, forgot to state that I’m looking to be using datashet for the build. Posting Quick Reply – Please Wait. Theory of operation and suggested circuits are provided in both data sheets. Remember Me Forgot Password?

(PDF) LM1872 Datasheet download

Thank you for your quick replies! What do you use as HF transmission? Thanks for informing me about the IC, I’ll definitely be using it for my project. Images View all Images in thread Views: Originally Posted by Magranon I have no idea what the values of B1, B2 or B3 are, nor is it mentioned anywhere on the website the image came from. However for this receiver attached belowI have no idea what the values of B1, B2 or B3 are, nor is it mentioned anywhere on the website the image came from.


Something like thisand shop? Bruce Abbott We want I found a few circuits, but I am a bit unsure about the usage of these ICs. Here is the companion data sheet for the LM transmitter chip.

P Having clocks in the circuit would be fine though. Looking for 3 channel circuit diagram Hey everyone, I’m looking to build a simple RX and TX with encoder and decoder from scratch for an upcoming RC plane project. If anyone could point me to any electronic schematics or any useful information in general, I would be extremely appreciative. May 06, The only criteria of the build are that it should preferably have 3 channels and that it must be able to control the rotation of two servos and the speed of the main motor.

These devices are well suited for use at 27, 49 or 72 mhz. Last edited by Magranon; May 04, at