Search:

Hi Guys,
Conrad in Germany (and some others) sends their stuff all over the world, EXCEPT USA & CANADA. It says so on their web site, page "Lieferung International" The page is available in english,...

Hi James,
there are some finished fuel meter available (some are made for boat engines).
Sensors for gas are not found easily, check McMillan www.mcmflow.com , they have what you need but not...

Hi Robert,
I am glad I could help. Let me know how your project moves along.
Do videnja.

Hi Robert,
The LM324 or LM358 can be used, but remember, they are not rail-to-rail, you have to design the circuit accordingly. Freescale Semiconductors has some very interesting "Application...

Robert,
the TL072 you have is old technology and I don't think it can be used at all for your application.
The gain you would need for a span of 0 to 5000mV ( 5mV amplified to 5 Volt) is 1000! A...

Robert,
to really understand the working of an Op Amp, or Instrumentation Amp, you should read "Design Reference" from Texas Instruments. You can download it from ti.com, just search for SLOD006B....

My favorite Op Amp for those applications is the TLV2470 from Texas Instruments. This is a rail-to-rail unit and almost indestructible. The input impedance is in the Meg Ohm range and the output is a...

Hi Joe,
I forgot about the "print screen" function.
Thanks for reminding me.

Hi Darrell, thanks for your reply.
If I wanted to post a drawing prepared with Eagle or PCB123 the person viewing would need the program. Is there an easy way to prepare a drawing and perhaps...

Hi all,
how can I publish a drawing on the forum?

nemesis:
any resistor from line voltage to a PIC is a no no, you are making the circuit hot. My suggestion is:
If you don't want to use a small rechargeable battery I suggest an AC plug in, bridge...

Hi blackrider:

The output from the trackball is a rectangular signal and you don't normally need a Schmidt trigger. If you needed one, there is one inside of many "PIC's".
Is this the only thing...

The circuit really depends on the type of ldr and the light conditions. More details please.

Hi Darrel,
thanks for the tip with the code box, appreciate it.
Gunther

My little drawing didn't work too well but you should get the idea...

Here is what you need to do:

From the low end of the ignition coil to the anode side of a diode 1N4002, then to Resistor 8.2K then to Resistor 3.9K, then to Basis of a NPN Transistor. A capacitor...

Please check the data sheet for the Pic at
http://ww1.microchip.com/downloads/en/DeviceDoc/30487c.pdf
page 35: Oscillator Types

Hope this answers your question.

Found the problem: when I use " ADCIN 1, Press " instead of

Press.highbyte=ADRESH 'move result of highbyte to Press
Press.lowbyte=ADRESL 'move result of lowbyte to Press

the ADC works...

harr... That was the first what poked into my eye. When I copied your code into my editor (Microcode Studio), it did not compile (picbasic pro) and several error messages popped up.
What software...

where are your ENDIF's

Some time ago I designed a battery charger for my tools and had the same situation, although I never had a problem with a blown pic when the battery was connected to the pic inputs. To be safe, I...

Hi Group
I have purchased a PIC18F2423 to make a pressure meter with 12 bit resolution.
To test the circuit I hooked up a 1k pot to +5 and ground and the wiper to the ADC input AN1. I noticed that...