programming the micro controller ic

I want to built my own orbot but dont know to programm the micro controller. in which language it can be done? is micro controller ic and micro pc ic are same?

Question by paragjh284 9 years ago  |  last reply 9 years ago


what are these ic's? Answered

I have puled two components out of an old radio/amp/ cd player etc. and i want to know what they are and if i can use them to make an audio amplifier. one says BC Power Module  SVI 3101 D on the front and 424  1w2  on the back and has 14 legs (it can be seen here, this is actually the exact one i have from the same appliance :  http://farm2.static.flickr.com/1042/4733036801_a2d72f1df9.jpg ) . The other looks kind of like an op amp, it has 12 pins and the part no 5a3920, and below that 218 130a (as you can tell i am not a good at desoldering and not having a solder suck doesn't help).

Question by makincoolstuff 7 years ago  |  last reply 4 years ago


Alternate IC for PIC16F688...? Answered

Im making 5x5x5 LED cube display and im unable to find micro-controller IC PIC16F688. Can anyone suggest alternative IC...

Question by Abhishek.mathur 7 years ago  |  last reply 6 years ago


Micro Controler Help? Answered

Hello, I just got a micro controler IC (i think), just the chip, and I want to know what I can do with it. The text on the chip reads as follows: 7CYA5KK G4 M430F4260 REV A It was a free sample I picked up so it didnt cost me anything, and its from texas instruments. Any cool projects or ideas would be great! Thanks!

Question by TXTCLA55 10 years ago  |  last reply 10 years ago


Good voltmeter ICs? Answered

I would like to make a readout for my knob-controlled DC power supply so I don't always have to use the voltmeter with it.   Web search for "LSI DVM" did not produce useful results. What are some good ICs to use for something like that?

Question by 8bit 8 years ago  |  last reply 8 years ago


Ic for ir base automation ?

Hi I want to make a 4 relay controller with ir . That means I want to control 4 relays with ir based remote control I have see some modules from internet but the ic name is removed. I want a Ic ( not micro controller or maybe a Attiny 85) to read different signals from ir receiver and trun on and of the relays. So please give me circuit with ic name. Thanks   

Question by Soumojit 2 years ago  |  last reply 2 years ago


RGB LED controller chip? Answered

Does there exist an IC, which can flash RGB LEDs? I really like auto-flash LEDs, but I would like to have several LEDs flash (and change colour) in sync. But auto-flash LEDs, have different flash rates. Is there an IC, which can flash several manual control 4-pin RGB LEDs???

Question by R0B0_Ninja 10 years ago  |  last reply 9 years ago


L239D Motor Driver IC? Answered

I saw some example circuits on how to control motors using L293D and arduino , Some included a lot of capacitors and some not at all.Which way is the correct one and what are the capacitors used for in the circuit.

Question by Bot1398 6 years ago  |  last reply 4 years ago


inline volume control

Hi im ramanta from indonesia i try to add an aux in to my old boombox, the reference from here https://cocodrilabs.wordpress.com/2012/04/05/installing-an-auxiliary-input-on-a-stereo/ i already got it working, but the problem is the potentiometer(volume). Only one channels work my boombox has 2 IC Amp, one for each channel. I already try to connect the source(ipod) directly to the amp (without the pots), work like a charm. But the sound is too loud and distorted

Topic by ramanta 3 years ago


I need to find a DIP USB keyboard controller IC. Do you know of any? Answered

Google isn't helping much, and the keyboards I have are all PS2, or their chip is covered with epoxy.

Question by -henry- 10 years ago  |  last reply 5 years ago


N64 Controller to PC

Hey guys, I recently pulled out my N64 and played Mario Kart 64 for some old-time fun. It was a rush.Anyways, I saw a video on youtube of someone who hooked up their N64 controller to their PC, and all the buttons worked.Now I recently saw an instructable on something similar to this:https://www.instructables.com/id/SNES-to-Parallel-Port/But I'm not sure if that same method would work or not.I also found this: http://arcadecontrols.com/Mirrors/emulatronia/n64pad/index.htmWhich is pretty much what I'm looking for, but I want to see if there's another way that doesn't involve the creation of a circuit with IC Chips.Anyone know? THanks.

Topic by Jackhole 11 years ago  |  last reply 7 years ago


Which IC to use for music reponse

I am looking to get a IC which can control LED's according to the music I am playing.... so I want have LED's on prototype boards...and I wan to control them on/off, change colors etc..according to the music I am playing in that room any help on what and where to get them would be great thanks

Topic by greenzellybean 10 years ago  |  last reply 10 years ago


LED Board Control

Hi there.  I salvaged 2 boards of LEDs from an old LED can at work.  They were previously DMX, and have an array of red, green, and blue LEDs.  There are four leads coming from the board, +, -, a dashed line, and an unmarked line.  I am looking to integrate these with another project, but am unsure how to go about finding how to control them electrically.  I was thinking it might be digitally controlled right on the board, but I see no IC.   All I am looking to do is figure out where voltage needs to be applied in order to have different RGB levels.  If I helps, the number printed on the board is FT140PCB GS.  I am able to attach an image if that would be helpful. Any ideas of how to go about this?  Thanks a lot, anything would help!

Topic by chamberlain2007 7 years ago  |  last reply 7 years ago


Ice Straws, Build a BBQ Barrel, Fireworks Controller

Ice Straws Build a BBQ Barrel Fireworks Controller 4th of July Freshly Ground Burgers Hand-Crank Ice Cream Terracotta Smoker Fix a Flip Flop Buffalo Wings Strawberry Rhubarb Pie Photographing Fireworks Guide to Beach Combing Tantoo Squirt Gun Refill Station How to Make Fireworks

Topic by randofo 8 years ago


Is it possible to use a 4017 ic to controll a bipolar stepper? Answered

I want to build a robot. i have got two bipolar stepper motors but my micro is 2 outputs short of enoght so i was woundering if i could use a 4017 taking a pulse from the micro then driving transistors on the outputs connected to the stepper.

Question by terrapinlogo 9 years ago  |  last reply 9 years ago


12 volt Charge controller (solar)?

Hi i am wondering how to go about building a solar charge regulator i need some help and passably schematics i have 2 broken charge controllers  the parts i have salvaged  11A20YR, LM324. IC x2 11YRD g4, CD40106BM. X2 IC IRF3205, MT 1D4H. X6 MOS-FET ALJ, D882, P63. X2 TRANSISTOR X16, GF1200, YELLOW THING X2 C1115, JC817,KENTC, X2 few other parts that are on the board

Question by Daniel Deacon 7 years ago  |  last reply 7 years ago


Pushbutton Servo Control with a 555

I've found numerous write-ups on getting a servo working with a 555 IC but it's not quite the functionality that I'm looking for. What I'm trying to do is have two buttons go to a predetermined position but the write-ups have two buttons that just go clockwise or counterclockwise. I know this can be done with an Arduino but I'm trying to avoid that route so I can keep the footprint as small as possible. I've attached a picture of the schematic I was working from.

Topic by XAlliedYouthX 5 years ago  |  last reply 5 years ago


Help with ST72F324 micro controller?

I need to read the software program from this chip used in control equipment . The original manufacturer is no longer in business but issued a software update before going under. I have an updated control board and if it's not code protected I can then update other equipment still currently in service. I don't want to spend to much as I'm not sure if it's readable? The control board has a 10 way programming IDC socket on board to allow software updates... so I just need to link to this by the simplest / easiest method possible.

Question by appolo 9 years ago  |  last reply 8 years ago


Does anyone know how to test ic's and identify them where is the best online electronic shop?

Knowing what a ic chip does in a circuit the one here in circuit controls commands of the tape control from a Revox A700 reel to reel. Anyone had any experience with reel to reel tape recorders especially Revox?

Question by denoidat 9 years ago  |  last reply 9 years ago


How detect the speed changes of fan using a controller ic?

I have a ceiling fan manual regulator, the voltage output that i got when different speed is 80v,120v,180v,200v respectively in my project i want to detect the fan speed changes. that means if fan is running in 1st speed then user turn into second speed it should be detect(by using in Arduino) .how can detect this?I tried to use a current sensor(ACS712) at output of a regulator then detect the current for different speed..but the variation still small cannot be detectable.

Topic by wounder 21 hours ago  |  last reply 10 hours ago


Help with AVR servo controller

I have a bunch of ATtiny 2313's, an arduino, and plenty of resistors, other ICs etc. I want someone to help me program and build a ATtiny 2313 based servo controller, that must work from a single, inverting input (each direction moves the servo to the right or left, only needs about 90 degrees of movement, so 45 in each direction). I don't have a programmer, but apparently you can program them from arduinos, so you would also need to show me how to set up a breadboard and some code to program the servo controller code to the ATtiny. If someone could help it would be great, its for a project but I have never done anything with AVRs before and I have only used my arduino a few times to make LCD drivers etc.

Topic by andy70707 8 years ago


Idea: cheap multichannel remote control system using IC 555 (transmitter), 2917 and 3914 (receiver). Is this feasible?

Can we make a cheap multichannel remote control system using IC 555 as frequency generator for transmitter (with several buttons connected to different resistors to yield different frequencies to blink the IR led), and as the receiver we use IC 2917 to convert freq to voltage and feed it to IC 3914 as the channel selector? The 3914 datasheet tells that it has 'dot mode' beside the bar mode. Do you think it's feasible? Care to help with the schematic diagram?  Thanks a lot. P.S. This vague idea is inspired by the Led tachometer instructable found in here.

Question by verdastel 8 years ago  |  last reply 8 years ago


Could u plz gimme the use of IC CS9370DGP?

1stly i went to purchase the IC MT8870 for dtmf decoder..he gav me dis cs9370DGP nd said disz is new one nd it works like MT8870..bt i got a doubt whether it works vth the circuit built using MT8870..plz kindly gimme some suggestions.. if possibl plz provide me the circuit for mobil control robot using cs9370DGP.. Plzzzzzzzzzzz:(

Question by nav.leo02 8 years ago  |  last reply 8 years ago


Basic RF control transmission

My goal is to press a button on my transmitter side and have the receiver flip a relay - that's all.  It's probably the simplest possible use of RF technology...  and it's almost impossible to work out on google.  I am trying to transmit and receive just a simple control signal about a range of 300m, so dismantling 27Mhz toy cars is not an option.   Has anyone successfully made a simple RF circuit before? I can buy a 433Mhz transmitter with this range, but they take FSK or ASK modulated signals.  From what i can tell, there is nothing simpler than the 'OOK' version of ASK modulation for transmitting signals.  If I'm wrong, please correct me.  Otherwise, if I'm stuck with FSK or ASK.  I found one site (bottom of PDF: http://www.edn.com/contents/images/101101di.pdf) providing a simple circuit to produce FSK.  I was hoping for something simpler, but if you think this is the easiest way, i'll give it a shot. Can someone guide me towards the correct ICs and circuits to create this project? Thanks in advance for your help

Topic by trytrytryagain 7 years ago  |  last reply 7 years ago


How to use an LED Driver Cycle Flash Controller?

Can this device (w/o any other IC's) be used to sequence/chase LED lights.

Question by cgc 1 year ago


How to upload a sketch on an Atmega 8 IC?

Hey frnds! we r working on a simple persistence of vision project. for that i'v bought a cheap Atmega 8 From here: Robomart Atmega 8 Project Board With Controller V 1.0 I think it have arduino bootloader by before but i dont know how to upload a sketch to it. I have an arduino uno by before. Can it help in some way?

Question by DELETED_Snehil1101 3 years ago  |  last reply 3 years ago


TOYS with LED's

Hi, I recently bought one sword with LEDS and I want to know how they control the LEDS (it have different patterns of lighting). They use a PIC or IC ? I open the sword and have a very small PCB board with the IC cover with a black solid coating my questions are: The toys use and IC or PIC? What is the difference between IC or PIC's? They control also the voltage of the LED (different color of LED have different voltage)? The PIC/IC is programmed in which language? Where can I found more resources about this topic ? thank you for any help Chris SWORD http://www.rinovelty.com/index.cfm/fuseaction/products.thumbs/cat/114/page/2/filter/pricerange%7Cany%7Cany/Light_Ups_Light_Up_Swords

Topic by christoys 6 years ago  |  last reply 6 years ago



Problem with ATtiny85 IR controlled LED

I am making a LED Light Stick with IR control to change the colour. Uploaded the schematics I made. Is there any mistake ? Do i misunderstand anything ? If yes, please forgive me, I am a complete noob and here to learn. I am going to add a 5v regulator to the Attiny85 power supply. And 380ohm resistor from pin5,6,7 to the corresponding transistor's base pins. I planned to use S8050 NPN transistor. How i calculate the things: 1. The RGB LED Strips i using is rated at 15W/metre @ 5V . Power supply i am using is 6V which is 4xAAA battery .I apply P=IV and get 2.5A/metre of current. Then I calculate current used in 60cm of LED Strips (2.5/100*60) and I get 1.5A current per 60cm. I devided the value by 3 and get 0.5A for each Red, Green and Blue pin. 2. Next step, I found the S8050 DC current gain (hFE/Beta) which is 40 and apply the formula Ic/Ib = B (Ic = 0.5A , Ib = unknown, B=40). I get the Ib of 0.0125A. Which mean i need 0.0125A of current in order to Fully-On the transistor at Ic=0.5A @ 6V. 3.To find the resistor value from Attiny85's Pin, I apply formula Ib = (Vb-Vbe)/Rb (Ib=0.0125, Vb=5 because the power supply of Attiny85 is 5v not 6v , Vbe=0.7V , Rb = Unknown) and i get value of Rb = 376ohm approximate to 380ohm. Another issue is that i didn't really know how to write the code. analogWrite seem didn't work for ATtiny85 sincce there's just 2 analog output for the controller. Or delayMicroseconds will work ? But i could'nt figure out how to write the code. I am very new to arduino. I know i should start at the basic first but i really need to get this project done. And please forgive my language. I didn't know English very well. Thanks a lot.

Topic by Sooncheng 1 year ago


How to make Musical Fountain?

I am very much interested in making a musical fountain not a big fancy one but a small which can control itself on rhythm like lm3914 controls LED can it control water pumps as well? If not then which IC can control it and how? Please help. 

Question by harryjone 8 years ago  |  last reply 8 years ago


Tips or products you recommend for clearing or preventing ice in winter?

My partner and I just bought a house and we're doing some repairs and upgrades. One of the major things I want to focus on is making our front entrance less icy. Most of the time we're covered in snow, but whenever it warms up briefly we end up with an icy disaster on the front porch the next morning. :P Currently, the roof melt runs right off onto our front steps and it's a mess! (see picture for the icicle death trap)I have been using a "pet-safe" ice melt (we have two dogs who are in and out all day) but it doesn't do enough for how much I go through. I still break up the ice in the morning when using the ice melt because the ice builds up really quickly.Are there gutters strong enough to handle heavy snowfall? Some sort of heating element I could install? For reference, I'm in northern CO in the mountains and we tend to get feet of snowfall every winter! I've never lived somewhere with this much snow, but I'm hoping some of you do and can offer some suggestions :D

Topic by jessyratfink 4 months ago  |  last reply 3 months ago


Building Audio System, Have Questions About ICs? Answered

So as the title states I want to design an audio system, I purchased an old shortwave radio someone gutted, but the case is in great shape and looks really cool, would make a killer looking amp.  So a little background, I want to make a stereo amp I can hook up several inputs to and my speakers; likely a turntable, iPod, radio, and whatever else I feel like.  The radio came with a nice little 5 position rotary switch for that.  The main problem I am facing is what ICs I want to use, and what order.  I have not dealt much with audio and at first I thought of buying a radio and just putting the guts into this unit, but I thought this would be a good project to dive into audio work.  You can't learn if you don't push your bounds a bit, am I right? The first IC question is about chips like the PT2322.  There are several I have looked at that use a microcontroller for control, and I am not against using an Arduino Micro in this unit, but I am unsure of how the acknowledgment bit works.  The data input seems to just be a shift register, data gets clocked in, then latched.  Data is fed in in 8 bit strings, but then it mentions an acknowledgement bit as a 9th bit.  Is this bit for the latch, or is there a 9th bit fed in before everything is latched?  Should it be hi or lo?  As well I was looking at the commands, several commands have 7 of their 8 bits written as a *, does this mean that those bits can be set hi or lo?  I am sure these aren't difficult questions and I glossed over something important in one of the many data sheets, and that I do not use these chips with any regularity, if ever, doesn't help either!  But I like that these ICs all seem to have a 3 band tone control and volume control built into them. If I were not to use an IC controlled by a microcontroller, I am looking at using a BA3812 for the tone controls, 5 band is a little more then I need, I really only wanted 3, not 2 but not more then 3.  Bass, treble and mid range.  But I could not find a 3 band IC without microcontroller inputs required for operation, and it was not for the lack of trying.  I can handle 5 bands though, however I am wondering, should I go preamp to equalizer to the main amp, or where would I wire in the BA3812?  This seems like a stupid question to me, I feel like an audiophile is going to come along and say, "You never put the equalizer after the preamp, it always goes here or there!" or something along those lines.  As well, regardless of where its going to get wired in, since I am doing stereo not mono, I assume I will need 2 BA3812's, but the datasheet supplies a circuit for 3 Chips as well.  Which would be suggested, 2 or 3?  I am wanting to control both left and right tone controls together, so using 5 pots instead of 10, and would also like to be able to have a balance control.  I didn't see anything about balance control in the BA3812 datasheet, would there be a good way of accomplishing that with these ICs or the use of a couple op amps maybe?  I didn't really look into balance, I should have before asking questions. For the preamp the LM1036 seemed like a good choice.  I was reading into preamps, and they seem more important for the turntable then anything else.  The way the grooves on a record are cut they boost the high frequencies so they don't fade awayat lower volumes or something like that.  Because of that a preamp that boosts bass and cuts treble is useful and improves sound quality when using turntables.  Should I use a preamp only for the turntable input or for all inputs?  If I adjust the equalizer for records is a preamp necessary or should I use the preamp and set it with trim pots to boost bass and cut treble a little, or should it be fully adjustable as well? As far as what to use for the final amplification I am at a bit of a loss.  A home theater system I have is 1500W and is adequately loud, but the system I have for my turntable right now think is only 250W I believe and it seems louder.  Never really understood wattages for "loudness"  or output on sound system.  I saw an IC (can't remember number, its a TDA though) dual 50W amplifier.  Not sure if 50W for each channel would be enough.  Advice would be helpful. As a side note, if I do go the route of a microcontroller, I found this NJW1186 with stereo input and 5.1 surround output which I thought would be cool. I really appreciate any help. Thank you

Question by KlockWork 4 years ago  |  last reply 1 year ago


is it possible to use a low voltage controller at higher voltage?

I want to make a isolated switching power supply intended to drop and convert 220VAC to 12VDC, but the only available controllers in my area can only handle 100VDC at maximum. is there a way where i can use those switching controllers at 220VAC?

Question by codestroy7 6 years ago  |  last reply 6 years ago


how many dc motors can be controlled using dtmf decoder mt8870 ?

I am making a mobile controlled robot project using dtmf decoder ic i want to control 11 motors is it  possible and how which motor driver should i use and can i use atmega 8 or 16 

Question by townyw 4 years ago  |  last reply 4 years ago



Choosing IC

I recently came up with the brilliant idea (read: scheme) of constructing gloves with built in  RGB LEDs that fade through colors randomly. I plan to sell these to ravers as they are usually spoiled rich kids (no offense) and I can fund my new found interest in electronics. My question is if anyone knows of any ICs that can control this without having to program it, like the LM3914 can work as a VU meter. If no such thing exists, then the cheapest alternative.

Topic by wootwootman 8 years ago


the motor driver L293D controlling the direction of motor, i want to use limit switch to control two position of motor

I am developing a automatic gate project. I want the DC motor stopped as soon as the gate closed or opened completely. I use IC L293D to control the motor forward or backward. This project is also using Arduino. I plan to use a limit switch to control the movement of  DC motor.

Question by FarhanJ 3 years ago  |  last reply 3 years ago


dtmf circuit problem?

This is the circuit for dtmf based robot using cd4514 for 16 outputs it has 2 l293d ic for controlling 4 motors will this work??

Question by agent555 4 years ago  |  last reply 4 years ago


Can anyone help me making cnc controller??

I want to make a cnc, I have bipolar stepper motors and l293d ics can anyone help me making the pcb layout board for bipolar cnc controller with db25 connector(printer port). I have tried making my own but it didn't work. So plz help me out. 

Question by ram_aloktripathi 7 years ago  |  last reply 7 years ago


Ultrasonic sensor controled directly from arduino?

I'm on a time crunch for a project, and I want to have distance sensing.  Unfortunatealy, i dont have enough time to get stuff shipped, nor the budget to use radioshack.  I was wondering if I can use a single pieze transducer without premade circuitry, and control it from an arduino.  I have some transistors, some common ICs (386, 555, etc), and basic passive components, plus two arduino UNOs (one with a broken FTDI adapter) can it be done? I don't need an  exact, continuous, or scaling measurment, just one that gives me an idea of the distance/presence of an object. 

Question by jduffy54 6 years ago  |  last reply 6 years ago


How do I use an Arduino to switch another IC's pin (reset) to ground?

I am trying to turn an IC's reset pin to ground with an Arduino.  It is a 5 LED array that has an IC controlling several flashing modes. I need to reset the IC to change modes and I want to use an Arduino Nano. I have seen an explanation setting an digital pin to input and then making it low and then setting the pin to output but I don't understand the process.  Supposedly it simulates a momentary push button switch using an Arduino. I guess I need a very thorough explanation for someone from the slide rule era. Thanks in advance. Murphy

Question by MurphySquint 6 years ago  |  last reply 6 years ago


Rspberry PI I2C message control through Web portal

I need help to build web page which can control devices connected to raspberry pi through I2c . For example if i connected some DAC IC with raspberry pi . i i should able to adjust that DAC value from web. Please help us

Topic by Logen 4 years ago  |  last reply 4 years ago


How to control more positive current using microcontrollers?

Most microcontrollers can directly control low current  at +5v. Using NPN transistors I can control higher currents, but now negative. My question is: how to switch more positive current (>40mA) than my microcontroller can do directly? The obvious idea is to cascade a PNP to a NPN transistor, but aren't there ICs ready-made for it? More or less like UNL2803A, but using Sziklai arrays instead. What would otherwise be the "standard" way of doing it?

Question by eshneto 9 years ago  |  last reply 9 years ago


16x16 LED panel direct control

Hi all, I got 10 LED panels of 16x16 LEDs each. Now I want to create a big modular display system with these and I'm also planning to post this on the instrucatbles website once I succeed. But I have some problems getting started. I spent alot of time reading all LED matrix related topics on the website here but none of the designs matches the fixed design I have on those panels. Instead of using some sort of multiplexing, 32 shift registers are used for 256 LEDs which means every LED has it's own shift register output. Put then again, I also find 3 buffer ICs on the panels and I have no idea where they are used for... Below the info I have now: 1 PANEL: - 16x16 yellow LEDs - 32x M74HC4094B1 8-bit shift registers - 3x 74HC125N Quad buffer/line register, 3 state Pictures: http://www.myalbum.com/Album=64MKOUJR First I want to work with only 1 panel and be able to control this by putting images on it. But for this I have to understand completely how the hardware is built up so I first want to create the schematic of 1 panel. Can somebody help me with this and get me started on the project? First goal: just control 1 panel with an AVR to put some text on it and let is scroll. Final goal: be able to connect multiple panels and configure the software accordingly to the panels used. Then use a PC to put images on the screen and maybe even create a live feed (webcam capture). For this maybe an FPGA should be used to have more processing power/memory. Many thanks already in advance!

Topic by kris_ge 6 years ago  |  last reply 6 years ago


I am building Tom McWire's Stepper motor controller, Where Do I wire everything up to? Answered

I am no good at reading schematics and I got the diodes, MOSFETS, and IC SOckets in place. I think I can figure out everything EXCEPT the steppers and the Light Bulbs. Also, what kind of motors do I need?  Thanks Oodles,  Zach

Question by 16zzundel5 9 years ago  |  last reply 9 years ago


Can i control the time wich a relay turns on without using a programable ic? Answered

Hello guys im building a project but i have an issue i need it to keep the current flowing for 5 secs to turn the relay for 5 secs i mean i press n release the button and the relay keeps on for 5 secs i dont have acces to pics and yet i do have arduinos but im not gonna spend an arduino for a project that means only 1/4 of my grade... thanks

Question by cupnoodles2 9 years ago  |  last reply 9 years ago


Who know how to using Programmable Interface Controller (PIC)?

How to develope a measurement distance device using Programmable Interface Controller (PIC)? I don't how to start my project... i also do known how to write the programming for this project..and how to build my circuit... my IC is 16F628A. LCD is 16x1... please if anybody known PIC, help me!!! ( i _ i )

Question by waiteng 9 years ago  |  last reply 9 years ago


How do i change the RC frequencies? Answered

I have gotten a RC helicopter from a friend but it has no controller and the IC chip is soldered in and the frequency is 40Mhz . So I was wondering how I can change the frequencies from one controller so that I can use it on my helicopter.

Question by Tomagedon 5 years ago  |  last reply 2 years ago


Meade LX200 motor controller chips needed - L2724 (sip9)

My scope has gone awol and I can't locate these chips anywhere. L2724 made by STI. They were apparently end-of-life'd. I hate the idea of a $4000 paperweight sitting in my garage. Any ideas where I can find 2 of these chips? My astrophotography is impossible till I get this fixed.

Topic by Dark Light 6 years ago  |  last reply 6 years ago


Variable Constant current in micro-amp range? Answered

Would like help with finding a IC that can be controlled directly or indirectly using an arduino.  It needs to go from 10 microamps to about 200 microamps. I have a 5 volt power supply. Is there an IC for this, or how should I do it. I couldn't find anything on google that i understood. Thanks.

Question by headslant 2 years ago  |  last reply 2 years ago