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  1. Hemi345

    Error: Hardware not found on COM18!

    It sounds like you're on your way. FWIW, the serial in and out, C.5 and B.0 locations, on the 14M2 socket appear to be bent in quite a bit like you stuffed a probe in them to do continuity checks. I reckon they could/will cause issues down the road if the matching legs on the 14M2 aren't bent...
  2. Hemi345

    PICAXE 08M2 - basic connections handouts

    This sentence should be reworded: I would suggest something like what is stated in Manual 1:
  3. Hemi345

    Right sony Remote

    Excellent! I don't know what motors you're using, but the SN754410 can handle up to 36V, so give'r more power captain. ;) Also a finished picture of your project from a little further away would be cool :cool:
  4. Hemi345

    Right sony Remote

    @zneb, I think you're really close. Just add a capacitor across the + and - on your logic rail (left side of breadboard). In the space between the PIC and the SN754410, (rows 11 thru 14) build the download circuit with the 10K and 22K resistors like the schematic I posted in post #34. Verify...
  5. Hemi345

    Right sony Remote

    Also, the green wire in row 15 on the breadboard needs to be moved over to logic V+ as well. With regards to the PICAXE, I don't see the 10K (R2) or 22K (R1) programming resistors. You really should have a decoupling capacitor near the PICAXE (C1), like 0.1uF / 100nF especially when motors are...
  6. Hemi345

    Right sony Remote

    @zneb, I've circled the two enable wires that need to be moved to the logic V+ rail instead of the Motor V+ rail. I'm not seeing specs on the enable pins in the Ti datasheet. It doesn't indicate what the max voltage, threshold, etc is for the enable pins. But I do see in their test...
  7. Hemi345

    A gap in the 08M2 documentation?

    Yes, 128 bytes for 08M2, the first 28 can be referenced with variables b0 thru b27: http://www.picaxe.com/What-is-PICAXE/PICAXE-Chip-Sizes/
  8. Hemi345

    Right sony Remote

    The L293D (atleast the ST variant of it) has been reliable for me without much else as it has flyback diodes built in. I agree the fritzing schematic from the Otvinta is lacking. I'd put 0.1uF ceramic capacitors near the V+ pin on the PICAXE and the Vss pin on the L293D. A bulk 10uF in the...
  9. Hemi345

    Right sony Remote

    I have the exact same TV remote. I'm using it to control my PICAXE-based window blinds project in addition to controlling my Sony TV. The remote programmed with the default 00000 code for the "TV" button works fine. I'm using TSOP4838 which appears to be the older version of the TSOP38238 so I...
  10. Hemi345

    Other options to wirelessly program PICAXE?

    Might be worth a shot as cost to entry is really cheap and available.
  11. Hemi345

    MAX6675

    Yes, this is what I'm doing with my Humidistat project. A 20X2 is the master, while the 14M2 is the slave. They're connected together with two pins each with a 330ohm resistors between them (to protect them from damage should one pull the pin low while the other has it high). I call one pin...
  12. Hemi345

    MAX6675

    FWIW, the 185 reading was on the old 5V system where I used two conductors for each pin and it happened very infrequently. This time around, I only used one conductor for each pin to reduce capacitance. Looking back, I should have used a twisted pair in the cable for the the data and ground...
  13. Hemi345

    MAX6675

    Yes, I have two DS18B20s connected to that little PCB that runs at 3.3V. The naked one you see in the lower picture plus another like the weatherproof ones you linked above. The weatherproofed one does not have any additional cable added. I think it has 3ft pre-attached (it's the one on the...
  14. Hemi345

    Other options to wirelessly program PICAXE?

    Thanks for all the replies. I was more interested in a pre-made solution like the ERF just for convenience. Two of my projects (powered by mains) are inconvenient located so was looking for wireless options. Usually I make changes to the program at my desk, go to the location of the device to...
  15. Hemi345

    Other options to wirelessly program PICAXE?

    With the ERF module being out of stock for a while, are there other options to wirelessly program a PICAXE? BTW, @hippy @Technical : a lot of the BOM "Buy Now" links in the Circuit Creator that go to the PICAXE store are broken with the store redesign. For example, a Buy Now link in...
  16. Hemi345

    MAX6675

    I would get that "185" reading as well with the old DS18B20. I had the 4K7 pullup resistor out at the sensor. This time around, I put the pullup right at the PCB: The sensor is at the end of ~30ft of CAT5 ethernet cable. I fried one of the two weatherproof sensors I had (Lance posted a link...
  17. Hemi345

    code for reading a single i2c device

    I would assume so, but impossible to know without a schematic if the SDA and SCL logic levels are converted to work with your 5V. Try running the PICAXE at 3.3V. The sensor itself will work down to 1.8V, so as long as the LDO on the breakout board will function when fed only 3.3V. Sensor may...
  18. Hemi345

    code for reading a single i2c device

    This might initiate a D1 pressure conversion: hi2cout 0,(%01001000) D2 temperature conversion: hi2cout 0,(%01011000) So final code would be something like: #Picaxe 08M2 main: hi2csetup i2cmaster, %11101100, i2cslow, i2cbyte hi2cout 0,(%01011000) pause 20 'give it time to do...
  19. Hemi345

    code for reading a single i2c device

    Did you solder this sensor yourself or did it come on a breakout board? I soldered a similar pressure sensor on my AXEtimeter project and had a tiny solder blob touching the metal lid on the sensor that I needed to wick up. Check that you don't have something similar like that on yours. Page...
  20. Hemi345

    Automatic Home Humidistat and HVAC Logger

    When the HVAC's blower fan is running, 24VAC is provided to power the humidifier. I took one wire from the 24VAC and twisted it together with one of the wires on the humidifier's water solenoid using a wire nut, then ran it to one of the "IN" terminals on the PCB (the red wire). The other wire...
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