i know there all the resistors and transistors but how do i tell what they are and what else is on there. also can i use just an random circuit board for anything or are they made special for certain things.

of these earlier satellites use vacuum tube as part of their electronic packages instead of solid state circuits (transistors or other solid state devices) that are current used. I was wondering if some of the old rockets and satellites, especially during the 1950s, and perhaps the early 1960, had employed the use of vacuum tubes in their guidance and other circuitry.

Hi,
I have spent a long time researching up about using multi-channel radio control equipment (specifically aircraft RC systems as they have a large range of channels) and interfacing it with motors and other devices well outside their capable operating range. There are a few things I would like to know about how they can be integrated. One of the most annoying things about aircraft RC systems are the much lower voltage used on the reciever end (4.8V – 6V) compared to RC cars (6V-12V).
I first realised that this was not as simple as I once thought when I was given 3-channel RC helicopter transmitter and reciever and in the hope of wiring the RX outputs to transistors and being able to drive my higher voltage, high power motors. However this miserably failed when I realised that the reciever output was pulse width modulated so there was no linear voltage relationship I could use to drive a transistor with a variable voltage level across the base. I have looked around at frequency to voltage converting circuits and the like but I have not found any practical ones I can build with what I have. I remember hearing somewhere an RC filter can be used but has a comparably slow response time to frequency changes.

Here are the questions:

1) In most aircraft/helicopter RC systems, there are toggle switches on the controller. Do they just change the reciever output on and off?

2) What is the simplest, most effective way of converting a PWM/frequency modulated signal into a linear voltage ranging from 0V to supply voltage (depending on pot position)?

3) How do people build these high power remote control machines/robots in terms of the transmitter & reciever (converting the PWM signal into a linear voltage or some other method)? What type of high-power switching system is used to isolate the reciever circuit from the high-power circuit? (Transistors, relays etc…)

4) Where can I find an example of how an electronic system is integrated for use with radio control equipment? (Something like a control circuit for a robot from battlebots or robot wars)

Would be grateful for any helpful information,
Thanks.

Hi,
I have spent a long time researching up about using multi-channel radio control equipment (specifically aircraft RC systems as they have a large range of channels) and interfacing it with motors and other devices well outside their capable operating range. There are a few things I would like to know about how they can be integrated. One of the most annoying things about aircraft RC systems are the much lower voltage used on the reciever end (4.8V – 6V) compared to RC cars (6V-12V).
I first realised that this was not as simple as I once thought when I was given 3-channel RC helicopter transmitter and reciever and in the hope of wiring the RX outputs to transistors and being able to drive my higher voltage, high power motors. However this miserably failed when I realised that the reciever output was pulse width modulated so there was no linear voltage relationship I could use to drive a transistor with a variable voltage level across the base. I have looked around at frequency to voltage converting circuits and the like but I have not found any practical ones I can build with what I have. I remember hearing somewhere an RC filter can be used but has a comparably slow response time to frequency changes.

Here are the questions:

1) In most aircraft/helicopter RC systems, there are toggle switches on the controller. Do they just change the reciever output on and off?

2) What is the simplest, most effective way of converting a PWM/frequency modulated signal into a linear voltage ranging from 0V to supply voltage (depending on pot position)?

3) How do people build these high power remote control machines/robots in terms of the transmitter & reciever (converting the PWM signal into a linear voltage or some other method)? What type of high-power switching system is used to isolate the reciever circuit from the high-power circuit? (Transistors, relays etc…)

4) Where can I find an example of how an electronic system is integrated for use with radio control equipment? (Something like a control circuit for a robot from battlebots or robot wars)

Would be grateful for any helpful information,
Thanks.

I have hobbyist level electronic circuitry knowledge and am working on a project that I’m sure there is a real basic solution for that I just haven’t learned yet. I have an 8-bit encoder IC that requires Gnd for it’s low and Vcc+5 for high. I need to be able to switch them via a onboard DIP switch (on/off). A 3-way switch won’t work since I need to use the DIP switch. The only other thing I can think of is using relays which is not an acceptable solution for this project.

I figure there should be some way to use a transistors configuration to connect Vcc when present and connect to Grn source when 0v.

Any knowledge or links to specific pages that show this basic concept I am looking for.

Thanks

I want a user friendly software that uses a drag and drop approach to design a electronic circuit, measure current or voltage between any points, some basic components in it like resistors, transistors, capacitors etc… Do you know any software like that?
Sheldon, i wanted a drag and drop type software. not a programming software..

and Blackstreet you dipshit, your software doesnt allow me to test the circuit.. it allows me only to build it and chuck it out of window.
All these dipshits got the answer wrong.
All of these are only drawing software. But i wanted a software with which you can test the actual circuit.

Audio book is a plus, must cover all this topic.
Kirchhoff’s and Ohm’s Laws
Series Circuits
Parallel Circuits
Series and Parallel Combination
Alternating Current
Capacitive Reactance
Inductive Reactance
Resonance
Filters
Diodes
Transistors
Transistor Regulated Power Supply
Transistor Amplifiers
Differential Amplifiers
Operational Amplifiers

I’m making a proximity sensor circuit and want to use a relay to trigger lights or toy motors or something.

My question is what do I need to know to figure out which relay I need.

I know the voltage and amperage(9v -400mA) of my signal and a rough idea of my main load (one hundred LEDs or 4-5 toy motors). How exactly do manufacturers call these ratings and is there a standard naming convention for relays similar to transistors and diodes? I can;t order online so local electronic shop will have to do.

Hello, I was wondering if there is a store or site that sells electronic circuit components such as LEDs, Micro controllers, transistors, capacitors, and other components

also If you know of a good supplier in the chicagoland area that would be great too

thanks

like simple circuits which use resistors transistors ,ICs etc