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    Talking Multimeter Based on PIC32MX250F128B

    Rachel Dipirro and Jonathan Lo,the two person I adoring, made an interesting Talking Multimeter Project for their Cornell University ECE 4760 Final Project. The multimeter is built around a PIC32MX250F128B. This is not a robust product that will be replacing your desktop multimeter since the...
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    Teensy 3.0 Problems with moderate range (~40m) OneWire Signals

    I'm using a Teensy 3.0 (with its 3V TTL signaling) to try and communicate with some Dallas DS18B20 temperature probes. I'm not using parasitic power because I've heard a separate power line allows for more reliable longer connections. I'm powering this using the 5V Vin pin of my Teensy...
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    Teensy microcontroller showing slow fall time (but fast rise time)

    My Teensy++ 2.0 is showing some slow fall times, around 1ms, when I set a pin to low. It looks like there's capacitance on the line, but the rise time is pretty much zero, so that can't be it. Has anyone had the same sort of issues? Is it possible that my Teensy is broken? I looked at the...
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    Teensy-LC 5v Pin?

    I want to connect a sensor (QRD1114 - requires 5v) to a Teensy-LC. I am a little confused as to which pin to use for 5v input. Below image shows how the sensor is connected to an Arduino UNO (right-side). However, I show on the left-side what I think the connections should be to a Teensy-LC...
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    Teensy 3.1 PWM, TIP31C, and LED strips

    Thank you so much.
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    Teensy 3.1 PWM, TIP31C, and LED strips

    So I have been having some trouble with my Teensy and I think I have an idea of what it is but I need some help understanding it . So I have four 12v RGB led strips. Each color pulls close to an amp so I used 12 TIP31C NPN transistors I had. This works but after a minute or so, or less if all...
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    Teensy USB Interrupts

    I'm trying to learn about interrupts using one of the Teensy USB boards. It's got an AVR AT90USB1286 chip on it. I'm using the code below, and I'm expecting my ISR block to get called and periodically flash the LED on pin 6. But nothing is happening. Can anyone see what I'm doing wrong? #include...
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    Can I use a UA741 here?

    Thank you for your advice, I will try it.
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    Can I use a UA741 here?

    I need to pass a domestic -10dbV audio signal (it should oscillates between -447mV and +447mV) to a microcontroller's ADC which only accepts signals that oscillates between 0V and 5V. I think that the simplest solution is to implement an op-amp summing amplifier circuit. My final configuration...
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