14 Threads found on edaboard.com: Pcb Timer
I have two PWM sources to control mosfet gate driver. the first source is MCU which isn't connected all the time (when needed)(it is not on the pcb), the second is timer 555 which is connected just when i push the buttons (right or left)(manual control and it is on the pcb). I isolated the two sources with pnp transistors to connect the (...)
Power Electronics :: 10-30-2016 08:55 :: mshh :: Replies: 8 :: Views: 342
hi all i got an old pcb an old pcb saw an qfp packaged ic named MH6111.. does any one have idea regarding ic... please do share ur knowledge because i couldnt find any datasheet....
Microcontrollers :: 12-18-2013 03:00 :: mrarslanahmed :: Replies: 2 :: Views: 1248
I have a circuit with two 555timers and a dark detector circuit that turns on a LED board. The first timer controls the amount of time the circuit stays on (3 minutes) and is tied to a second timer that turns on when triggered by a tilt switch. Both this timers stay on for 3 minutes or until the switch is triggered again to (...)
Analog Circuit Design :: 10-15-2013 15:35 :: walumbe :: Replies: 15 :: Views: 1050
User ?reddwarf? made a LED imagestter for a pcb.
The casing adapted from an old printer HP Photosmart C3180
The transformer adapted from an old TV
LED: 6x1W UV
timer: Omron H3CR-A
Time needed to exposure
Show DIY :: 09-21-2011 15:28 :: rickyjar :: Replies: 1 :: Views: 869
Two general comments.
- please ask a clear question. Tell which processor you are talking about. This isn't a guessing game.
- choose the right forum. The question is surely not related to Hardware & pcb Design
P.S.: The register name suggest a PIC processor. You'll find a detailed description of timer operation in the datasheet of the respect
Hobby Circuits and Small Projects Problems :: 06-08-2011 05:10 :: FvM :: Replies: 1 :: Views: 1672
missing parts for the schematics pcb lay file
Power Electronics :: 05-22-2010 22:44 :: rajudp :: Replies: 3 :: Views: 2610
Hi Everyone ,
I want to make UV exposure machine for pcb manufacturing. I want to know the important things to be consider while making such a machine.
This machine will be for prototyping pcbs only.
Please contribute your thoughts.
Thanks in advance..
PCB Routing Schematic Layout software and Simulation :: 04-01-2010 03:55 :: Spidyelectronics :: Replies: 12 :: Views: 4942
I am working on a project on which i have to send some information via RF. my system works fine on a pcb i made as a general purpose. my second board works fine but when i enable GIE it hangs. if i do not enable interrupt it is fine. (does not hang) extra things i have added in this board are Ferrite beads on Key Pad inputs and to RF modu
Microcontrollers :: 04-01-2009 07:29 :: saeed_pk :: Replies: 8 :: Views: 3138
I've tried a company for pcb manufacturing in HK.
You may like to try it.
You can contact them by
Business, Promotions, Advertising :: 10-05-2006 05:36 :: mralvin :: Replies: 15 :: Views: 6567
here i am uploading electronics softwares on
1)circuit maker for analog circuits and included some examples from Electronic devices from boyalsted.
2)PinTAr virtual lab electronics.
3) 555 to simulate various circuits based on 555 timer.
digital circuit simulator for digital circuits
all above are zipped with electronics.rar
Software Links :: 03-21-2006 09:55 :: tjr :: Replies: 0 :: Views: 1753
Im using the AM Transmitter and Receiver Pair along with the RF600 enoder and decoder.
I have constructed my pcb, the output is going to a 555 timer with a basic pair of LEDs and a buzzer.
At the moment when I press the learn switch the status LED on the decoded goes on but when I let go, it goes off again.
I have this working on breadboard w
RF, Microwave, Antennas and Optics :: 10-02-2005 14:06 :: mhamini :: Replies: 0 :: Views: 832
Microcontroller are the most single solution and ease for building...
See the options:
ATtiny 11 $0.24
The schematic and pcb for Your project are minimun, them I think microcontroller the perfect choise for You!
*OBS: The development tool for the microcontrollers are free!
MPLAB (for Microchip)
Elementary Electronic Questions :: 01-26-2005 07:25 :: gorkin :: Replies: 12 :: Views: 1708
555 timer calculator
Hobby Circuits and Small Projects Problems :: 07-05-2004 21:32 :: tanveerriaz :: Replies: 15 :: Views: 2883
i want to make simple project.i want to make timer counter.
but only five minute.five minute later counter is stop.
when i press button counter is starting..
5 minute later, automatic alarm and i press button again and stop sound.
or automatic stop (1 minute sound)
yes how is making it?
i want schematic and pcb file..
Hobby Circuits and Small Projects Problems :: 04-14-2003 18:42 :: SeTRoX :: Replies: 8 :: Views: 2411