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I know this is an old thread, but if anyone is still interested here are some pointers :
I opened up my RF remote today expecting to see a normal 315MHz or 433MHz ASK cheapo transmitter being used instead of the normal IR LED.
I was quiet surprised to see a proper circuit inside.
Protocol ...
The soldering iron gets cooled once you touch the PCB. This can be due to a large plane connected to the point you are soldering or because of insufficient power of the soldering iron. you must have a good soldering iron with enough power to keep the temperature during soldering, else the tip...
I don't think there are PICS with more than one INT pin. Still most of them have Interrpt on change for PORTB pins. You can also use CCP modules in the PIC to capture events. As a last resort you can use a 3 input AND gate to tie the three interrupts to the one INT pin of the PIC.
Hope this...
You can write a code that will read voltages through ADC pins of the PIC at preset intervals (usually .5secs) and then display it on the LCD. Here is a link to a video : www.youtube.com/watch?v=ugETSGtliNQ
Can you make the question clearer. Its hard to understand what you are trying to say.
1. You can short the IPs of NAND to get NOT gate, connect this to the OP of another NAND and you will get aa AND gate. (Or are you trying for a circuit level change?)
In the second figure, the shaded area is...
Switchers usually produce more noise than LDOs. are you sure you want to use switchers? Have you checked the ripple chara of the above mentioned switchers?
Hi there, good to know that you have done some research. Here are a few links you might find helpful :
1. Heatsink calculations - simple www.jaycar.com.au/images_uploaded/heatsink.pdf
2. A heat sink calculator : http://www.daycounter.com/Calculators/Heat-Sink-Temperature-Calculator.phtml
3...
Re: prblom with st-tx 01
Hook up an oscilloscope and look at the output waveform on antennae. Now give a high or low input and watch the output change. Also try providing a known signal.
I do not have a solution for you, but just a reminder. The voltage will fall exponentially and as the voltage falls, the switcher will draw more and more current. It may not last much long. Unless ofcourse, as you said, its a bank.
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