Hi, for a project i need to switch on and off a voltage supply (one cell lipo) using only one momentary push button. i found this http://www.youtube.com/watch?v=Foc9R0dC2iI but the problem is that if the user presses the button for a long period of time the output oscillates.Can someone point an IC that does this or a discrete circuit.
Hi, i'm building a PIC based wirst watch with a sharp memory lcd as the screen. it has an accelerometer, 4 push button,rgb led for the backlight, a micro usb connector for charging the lipo and a an 18 bit adc for fuel gauge.The pic is a PIC24FJ64GA102. I attached the schematic as a pdf and an image of the 3d rendered pcb. I'm finishing the last details on the pcb and i will ordered all the part and see how it goes :).
Hi, I need for an application a bluetooth module with an integrated antenna that can be soldered directly on the pcb, my problem is that i need a pretty small device, like this : https://www.sparkfun.com/products/10253 , but half the lenght. Any suggestion? Thanks for the help.
I need to drive 4 leds at constant current and be able to switch them on and off. The leds have a forward voltage drop of 1,5v at 100 mA, my power supply is 8v. I was thinking about putting the leds in series and using some IC or circuit to control the current. Does someone know a way to control them? Thanks for the support.
Hi, like the title says i have successfully ported the european tvbgone to the PIC12F1840. For now with only the 6 most diffused code, all the project uses about 17% of the memory program and 13% of the data memory. I am using the free version of hitec c so the optimization is not very good. Later this day i will upload a new project with all the code that i can fit on the pic. For test the code i make a simple board. Userled is RA4 and the pwm/ir led is RA5. Finally there is a tvbgone for an 8 pin uc that isn't an avr ;)
Just wanna to share my robot that i will bring(not sure if it is the correct verb) to my final exam at school. It is an hexapod robot that use two servos for each legs HS311(orizzontal) and HS485HB(vertical). The control board is for the moment an arduino but i will soon replace it with this http://www.settorezero.com/orbit16/home/ . You can find more images on this pages : http://letsmakerobots.com/node/29821 . Two videos of the robot are on my youtube channel : http://www.youtube.com/user/exapod23/videos .
I just finished to solder and program my free PCB. I don't solder all the parts because i'm going to use the board in a usb project. Thank you very much for the board :)
I finally finished my 8x16 ping pong ball matrix display, soldering all the boards, the leds, the wires and gluing the ball took me a lot of time. It uses a pic18f2553 to control two max7219, the string to display is sent via bluetooth. The photo of the display is a bit distorted, sorry but at the moment i can't take another. Quick video : http://http://www.youtube.com/watch?v=wFzCJ0YSlsE&feature=player_detailpage
i'm planning of building a robot with a dspic33fj128mc804 and two encoders for implement some dead reckoning algorithms so for learn something on the dspics i build a line-follower, it uses 6 analog sensors that are read with the auto-scan capability of the chip, the pwm is 12 bit and the control loop runs at almost 30 kHz (it only calculates the line position and the do a very simple PD routine that use fixed point math). The controller runs at almost 40 MIPS. I win most of the parts on the sparkfun freeday :D. Here it is a video : http://www.youtube.com/watch?v=B0XdQ6GRexo&feature=plcp .
i'm building a datalogger around the pic24fj64gb002 that saves the data from an accelerometer, temperature sensor, and a gps on a micro sd card and has also an usb port for configure the device and also for print the data if the pc doesn't has an sd card slot. I want the device to be as small as possible so i'm searching a small gps module (max 18mmx18mm and very thin) that can be soldered directly to the pcb and works on 3,3v. Thanks for the help.
hi, i'm planning of doing a robot with two motors and two encoder. for the motor part there is no problem but i don't know how interface the pic (a 18f4620) to the encoder. I was thinking of using timer 1 and timer 3 as counter but i dont understand if i can use them in the same time and how. the encoder give only one square wave that at maximun speed of the motor has a frequency of 2khz.
i wanna make a datalogger that records gps coordinate and velocity and accelerometer value on the three axis with a pic and save all the data on a sd card for later pc analyzing. Does anyone can point me some pic code or theory for make the sd card works? for my application is best to have all the datas save on a .txt file.
i'm making a micropov with 8 leds, 3v power supply and tilt swicth for sensing the direction. i made a prototype version of it on protoboard and the it works very well, the image is very stable and can see with naked eye. The final board will be all in smd and will have a button for the reset so after the effect or the pov it goes to sleep because i don't want a on/off switch. All the documentation is in the attached.
P.S.:i'm not a good coder and the function pov is very strange and complicated but it works and that is the important thing.the delay value "spaziolettere" is hand tuned and 1ms is the one that works on me. if you want to see a video of it PM me and i will send it via email
