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by eagleman
Fri Mar 09, 2018 5:21 pm
Forum: Beginners
Topic: Tachometer
Replies: 23
Views: 12626

Re: Tachometer

Just found out that a PIC18F67K40 development board is made by MikRoe and is available at most outlets like Arrow, Mouser, Digikey as MikRoe #2584 for $39.00. It includes everything to start programming immediately and has a bootloader and sample software.
by eagleman
Thu Mar 08, 2018 5:05 pm
Forum: Beginners
Topic: Tachometer
Replies: 23
Views: 12626

Re: Tachometer

I'm surprised that you are migrating from a PIC to Raspberry Pi. The Pi in Python and Pygame (maybe a better GUI?). I am migrating from the RaspberryPi (Python) to a combination of PIC (either PIC32MZ2048EFM100 or PIC18F67K40) and a Microsoft Surface Pro 4 via blue tooth. The cons I had with the PI ...
by eagleman
Sun Jan 01, 2017 12:21 am
Forum: Windows 10 for IoT
Topic: GPIO Values - am I going mad?
Replies: 5
Views: 1457

Re: GPIO Values - am I going mad?

do you have he thermistors in as part of a voltage divider. If so might the value of the non-thermistor resistor be too large or too small? If your thermistor is approximately 10K, then be sure the non-thermistor value is such that the voltage at the ADC reached the max voltage allowable by the 3008...
by eagleman
Fri Dec 16, 2016 11:39 pm
Forum: Beginners
Topic: Ford SBF monitoring
Replies: 32
Views: 5601

Re: Ford SBF monitoring

Hi guys, I'm new and this thread caught my attention? I'm looking to plumb a sensor, primarily my O2 and oil pressure, into a Pi. I have carb'd engine and do not like the look or need an AFR gauge running 24/7. Just thought this would be a cool project for this. Any good tutorials on receiving resi...
by eagleman
Fri Dec 16, 2016 11:26 pm
Forum: Beginners
Topic: Ford SBF monitoring
Replies: 32
Views: 5601

Re: Ford SBF monitoring

Sorry for the delay in responding, but I have sidetracked by other life activities. I have my "ECU" working and monitoring up to 14 analog signals and several digital signals with display to a RPi 7" touchscreen. Still a few minor bugs to work out, but it actually runs pretty well. There is a Python...
by eagleman
Sat Jun 25, 2016 3:16 am
Forum: Beginners
Topic: right click on touchscreen?
Replies: 1
Views: 1185

right click on touchscreen?

Can anyone tell me how to right-click on my new RaspberryPi 7" TFT touchscreen?
by eagleman
Sat May 28, 2016 10:01 pm
Forum: General discussion
Topic: compatability: Pi LCD vs WaveShare
Replies: 1
Views: 658

Re: compatability: Pi LCD vs WaveShare

Just noticed: The RPi boot screen on the WaveShare is shrunk as described in the original post, but in my software the screen apparently is putting out a full 800 x 480 but blanking out the rightmost 20%. So I see a foreshortened version of the full RPi boot screen but only the leftmost 80% of a ful...
by eagleman
Sat May 28, 2016 9:46 pm
Forum: General discussion
Topic: compatability: Pi LCD vs WaveShare
Replies: 1
Views: 658

compatability: Pi LCD vs WaveShare

A 7" WaveShare TFT screen was used to design my programs and worked fine. A new RPi LCD screen is now added to the collection and now there is a problem. Both screens are 800 x 480 color TFT screens. The RPi LCD interfaces thru the "DISPLAY" ribbon connector and shows full screen OK. The WaveShare i...
by eagleman
Mon May 02, 2016 7:28 am
Forum: Beginners
Topic: Ford SBF monitoring
Replies: 32
Views: 5601

Re: Ford SBF monitoring

Izzy, If you know some programming I'd suggest getting an early start on PyGame (part of the Python download) and especially learn about "sprites". Sprites are objects that appear in front of the screen background without affecting the background display. A good example is the common use of characte...
by eagleman
Mon May 02, 2016 7:13 am
Forum: Beginners
Topic: Ford SBF monitoring
Replies: 32
Views: 5601

Re: Ford SBF monitoring

Izzy, Sorry for the delay in responding. I've been off doing other things so I've not checked the forum lately. I'll answer in more detail in another post soon, but first let me point a few things to help you get started. 1. Just received the "official" Raspberry Pi TFT screen and it was well worth ...
by eagleman
Sun Mar 27, 2016 10:34 pm
Forum: Beginners
Topic: Ford SBF monitoring
Replies: 32
Views: 5601

Re: Ford SBF monitoring

some suggestions for your display: 1. You can use a jpeg (or similar) image as a background for your display. I used an image (from a wood catalog) of some burl walnut that pretty closely matched the wood on my dashboard. You can search for something on the net that would be suitable for your use. 2...
by eagleman
Sun Mar 27, 2016 10:09 pm
Forum: Troubleshooting
Topic: new RPi2 B ethernet problem
Replies: 0
Views: 291

new RPi2 B ethernet problem

I've been fighting with a new RPi2 B trying to get the Ethernet link to work with no luck. Previous 2 RPi2 B units had no problem with the current setup of the network, USB/RJ45 dongle, MicroXD card, etc. same memory and network connections and same dongle won't work on this new RPi. Tried several X...
by eagleman
Wed Feb 03, 2016 6:46 am
Forum: Troubleshooting
Topic: Pi 2 does not boot - only still red and green diode
Replies: 3
Views: 766

Re: Pi 2 does not boot - only still red and green diode

I have two RPi2 units that do the same thing. All internal regulators are putting out correct voltages. I only find one fuse on the RPi2 and it checks out OK through both resistance and voltage readings. They have both been powered by a 5.0 PSU with a capacity of 1.8amps. They have both been powered...
by eagleman
Mon Jan 25, 2016 9:57 am
Forum: Beginners
Topic: Ford SBF monitoring
Replies: 32
Views: 5601

Re: Ford SBF monitoring

The Pi died while on the trip. Ordered a new one to arrive shortly after getting home. Plugged in the new Pi with the old SDcard and it came right up including all software working and HDMI video to the old display. Will check screen wattage consumed and again start testing my newly fabricated proje...
by eagleman
Mon Jan 25, 2016 9:35 am
Forum: Beginners
Topic: Portable Power?
Replies: 8
Views: 1699

Re: Portable Power?

Why not use an any available battery type like a wet cell for a motorcycle, lawnmower, etc., for a 12v supply. There are also dry or gel batteries in UPS units, alarm units, and many other portable electric or electronic devices that might be available as scrap. Even a used or discarded battery from...
by eagleman
Sat Jan 23, 2016 4:27 am
Forum: Advanced users
Topic: Precise pulse counter
Replies: 21
Views: 7301

Re: Precise pulse counter

Thanks again to all of you who responded to my request. I arrived home (from California) yesterday morning and have been trying to catch up to "honey-do" projects. Also, the NEW Pi2 arrived today to replace the one that quit while away on my trip. I will get back on my project and report back on act...
by eagleman
Tue Jan 19, 2016 2:31 am
Forum: Advanced users
Topic: Precise pulse counter
Replies: 21
Views: 7301

Re: Precise pulse counter

count = cb.tally()
time.sleep(5)
new_count = cb.tally()
print("rising edges in 5 seconds was",
What percentage do you think the error might be in the 5 second sleep and also what might it be it the sleep was 250ms?
by eagleman
Mon Jan 18, 2016 10:22 pm
Forum: Beginners
Topic: Ford SBF monitoring
Replies: 32
Views: 5601

Re: Ford SBF monitoring

It just dawned on me that when I get home I can plug a decent walwart into a wattage meter and see what just the screen draws at sleep, with a static screen and with a very active screen. I'll post the results; it might be interesting. But remember, you should be able to put the video portion of the...
by eagleman
Mon Jan 18, 2016 10:07 pm
Forum: Advanced users
Topic: Precise pulse counter
Replies: 21
Views: 7301

Re: Precise pulse counter

Thanks, You've all given me a whole new world of code possibilities that I have to digest and understand... it may take me a few days to learn. I'll load as much info on PiGpio as I can onto my pad and study it on Wednesday during 9 hours of cross country air travel. Joan: is the routine you provide...
by eagleman
Mon Jan 18, 2016 8:42 pm
Forum: Advanced users
Topic: Precise pulse counter
Replies: 21
Views: 7301

Re: Precise pulse counter

pigraham and joan: GOOD catch on my fuzzy math. It is a MAX of 6500 rpm x 4 pulses per RPM = 26,000 pulses per minute or 433.33 pulses per second just as you corrected. Thanks. Wow, I really must have had my head up my butt when I figured that all out! Now I just need to accurately time that 250ms s...
by eagleman
Mon Jan 18, 2016 7:51 pm
Forum: Beginners
Topic: Ford SBF monitoring
Replies: 32
Views: 5601

Re: Ford SBF monitoring

I'm not sure what the actual 5vdc current flow is and I have so many 5vdc walwarts around I'm not sure which came with the screen. I do remember that it said something about >1a supply. Also, I have no way to measure the current coming through the USB cable. When not running my Python program there ...
by eagleman
Mon Jan 18, 2016 12:11 am
Forum: Beginners
Topic: Pi LED status on power up
Replies: 6
Views: 964

Re: Pi LED status on power up

Matt1471,
just in case it MIGHT be helpful, here is a good site for info on XD cards for your reference. You probably don't need this info, but just in case:
https://www.sdcard.org/developers/overv ... index.html
by eagleman
Mon Jan 18, 2016 12:01 am
Forum: Beginners
Topic: Pi LED status on power up
Replies: 6
Views: 964

Re: Pi LED status on power up

Are you using the industry formatter to properly format the card before loading noobs? The formatter might be able to find the card on your system even if the PC apparently doesn't see it. What size and brand are the cards? Are they SD or SDHC? Did your cards all come from the same source? Note: I h...
by eagleman
Sun Jan 17, 2016 11:20 pm
Forum: Beginners
Topic: Pi LED status on power up
Replies: 6
Views: 964

Re: Pi LED status on power up

When I try a good PI boot card in my PC I get a message from Windows10 saying something is wrong with my card and do I want to reformat it. I say no and can still open the card to see the contents. So before you reformat see if you can see the cards contents. For safety, I've copied whole cards to m...
by eagleman
Sun Jan 17, 2016 8:55 pm
Forum: Advanced users
Topic: Precise pulse counter
Replies: 21
Views: 7301

Re: Precise pulse counter

sorry for the delay, but I've been travelling. her are some snippets of code from the 20 page program. TachIn = 37 GPIO.setup(TachIn, GPIO.IN, pull_up_down=GPIO.PUD_UP) # Tach signal: (rpm*4) Tach1 = 0 TachCnt = 0 TachTime = .25 RPM = 0 RPMD = 0 RPMST = "3333" #######################################...

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