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  1. Replies
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    580

    Closed: Re: using a power inverter in a car

    The problem with that is the 110v output shuts off when it goes into a fault condition.
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    580

    Closed: Re: using a power inverter in a car

    This is the 3rd inverter I've bought and they all did the same thing. It just occurred to me that all I have to do is to use a 2nd battery, not connected to the alternator. Then I guess I could just...
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    580

    Closed: using a power inverter in a car

    I just bought a DeWalt 1000 W power inverter to power my laptop and 8" monitor for my 'carputer'. The 8" monitor is in the dash and shows the windows screen on the laptop. It works just fine when the...
  4. Closed: STM32 output connected to 3v3 converter only goes from 2.58 to 3.19vdc

    I have another processor card with 3v3 output I've put on the same 3v3 converter and I get a clean 5vdc out the other end. I'm using STM32CubeMX to generate the code and I set the pins to output &...
  5. Closed: using a crankshaft position sensor to implement electronic ignition

    I'm just about to get my Spartan-3E to read an optical sensor mounted next to the harmonic balancor so I can display the engine RPM. Thinking ahead, I would like to someday implement electronic...
  6. Closed: Re: Where can I find DSO probes for my Rigol DS1054Z?

    I need the RP2200. I found some on ebay.
  7. Closed: Where can I find DSO probes for my Rigol DS1054Z?

    I can't find them on ebay, amazon or the Rigol website. Can someone give me a link?
  8. Closed: Re: STM32F103 (Blue Pill) can only get A0->A3 to work as outputs

    I just put the whole project up on github.com at: https://github.com/sunbelt56/STM32F103

    - - - Updated - - -

    It's in gpio.c: MX_GPIO_Init()

    - - - Updated - - -

    Well, make a liar out of...
  9. Closed: Re: STM32F103 (Blue Pill) can only get A0->A3 to work as outputs

    This project was generated using STM32CubeMX with the Middleware set to 'FreeRTOS' and in the Project Settings->Code Gernerator the option to generate separate *.c/*.h files for each peripheral is...
  10. Closed: Re: STM32F103 (Blue Pill) can only get A0->A3 to work as outputs

    The ports used have all been initialized in a file called gpio.c in the init function. I could try to use a semaphore instead of a static variable in this case, I guess.
  11. Closed: STM32F103 (Blue Pill) can only get A0->A3 to work as outputs

    I have the Blue Pill - STMF103C8Tx - using Atollic TrueStudio and CubeMX with FreeRTOS. In a task, I write to the LED port (C13) and all of port A and port B and I can only get an output using a VOM...
  12. Closed: Re: (stm32f100 Discovery) Can I read output GPIO ports?

    OK - I've got it working now without using an ISR:


    void StartKeyPressed(void const * argument)
    {
    /* USER CODE BEGIN StartKeyPressed */
    // unsigned long ulReceivedValue;
    uint8_t u8_row;...
  13. Closed: (stm32f100 Discovery) Can I read output GPIO ports?

    I'm interfacing a 4x4 keypad to an STM32F100 Discovery board - using PC0->3 as the 4 columns and PB12->15 as the rows. The rows are outpus and the columns are inputs. The 4 rows do a scan (each bit...
  14. Closed: Re: Installing unofficial development kit for Espressif ESP8266

    Thanks. I didn't have any trouble installing the Eclipse env, but yeah, the Arduino looks a lot easier and has a lot of support.
  15. Closed: Installing unofficial development kit for Espressif ESP8266

    I just started downloading all the stuff to program the ESP8266 on a Windows machine according to the instructions here:
    https://www.esp8266.com/viewtopic.php?f=9&t=820

    Since I'm more at home on...
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    Closed: amplifier circuit for lm35

    I'm trying to get an LM35 to work with a LM324 op-amp. I can't make any sense reading the voltage output using a 5vdc supply. The voltage keeps going up. I was thinking the chip was getting hot...
  17. Closed: level shifting and amplifying signal from temp sensor with LM324

    I want to measure the output of an LM34 temp sensor and use and ADC with 0->5v. I'm only interested in the output of the LM34 from 0.8 to 2.2 volts ~(100F->220F). So I can use an LM324 as a...
  18. Closed: Re: I think I hosed one of my t6963 LCDs

    I think it might be salvageable because I am checking the status register for each command and it's obviously not hanging up, so that's a good sign. I'll let you know what I find out.
  19. Closed: I think I hosed one of my t6963 LCDs

    I had (2) t6963 LCD's, the one I think I hosed because I was converting the code from atmega328p to XMEGA128A4U and I had the chip enable inverted. I'm wondering if I just didn't wipe out the area of...
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    Closed: Looking for this 8-pin connector

    Here's a connector for some seat motors under a seat I'm retrofitting into an older vehicle. I don't know what the seats came out of. Can anyone ID this for me so I can order another male connector?...
  21. Closed: Re: Can't get Spartan 3E to talk over UART to PIC246FJ128 UART

    Hey, all it needed was a 4k7 pullup resistor. Works great.
  22. Closed: Re: Can't get Spartan 3E to talk over UART to PIC246FJ128 UART

    I tried the loopback test and it works fine. Then I hooked the RX/TX to a 3v3 <-> 5v converter and then into a RS-232 converter and it works going to minicom on my linux box. Then I put another...
  23. Closed: Can't get Spartan 3E to talk over UART to PIC246FJ128 UART

    I have a UART implemented using VHDL on a Spartan 3E and have the RX going to the TX of a PIC24FJ128. The RX from the PIC goes to the TX of the FPGA. I have the baud rate set right but they don't...
  24. Closed: stacking 2 SBC cards together via the PC104 pins

    I have a couple SBC cards from Technologic Systems - TS-7200 & TS-7250 - they have PC104 pinouts, the TS-7250 has the pins on the bottom as well as the top. I was thinking of trying to stack them...
  25. Closed: Re: Any method to dim the display backlight for a t6963?

    PWM off course! Any suggestions on what kind of NMOSFET to use?
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