I am working with a PIC micro-controller with inbuilt 10bit ADC and want to measure a voltage in the range of -1 to -3Volts. I thought of using an op-amp in the inverting mode to m …

What happens to a logic gate (besides magic smoke discharge) seeing a voltage greater than Vcc? Is it just because the gate was not designed to handle a higher voltage than the rec …

Pat asks: Accelerometer Breakout Board - ADXL193 +/-250g could you tell me if this is correct. Looking at the data sheet the mid sensitivity is about 8mv/G @ 5volts. If I use a …

So I've been reading a few threads here and on other forums. I understand there are various solutions for stepping down or up a voltage. What I have found are the LVC series shif …

I want to extend the use of a camera. The camera currently uses a special li-ion 3.7V 1000 mAh battery. I could grab a couple of those batteries, wire them up in parallel, and that …

Can anyone explain how one would convert one voltage range to another? I'm going to need to convert a range of 0 to +5 volts into a range of -5 to +5 volts. How would this be accom …

I am looking to power a PIC microcontroller with a supply voltage that ranges from 4.5V to 18V. This will be a battery powered device so I would like to conserve power, ie. linear …

Hi How can I implement (or maybe there is an IC that already does that) a board whose input would be I2C and output would be analog voltage (0V - 5V) ? Eventually I would like to …

I need to make a voltage level shifter. it needs to translate a TTL logic level into a 12v logigc level. what I've done is to apply the 5v at the base and 12v Vcc and to take the …

I am designing a circuit that needs to output 5VDC @ 1A. I'm trying to use a wall transformer to step the voltage down to 12VAC. The next step is the diode bridge and ripple capa …

I have a relay operated by an NPN transistor that needs some voltage applied to the base. I'm working with an arduino and if I give it a digital port, all's well. The circuit loo …

I have a switch marked as having a max current of 2A at 240Vac, and 6A at 125Vac; What would its max current rating be at 12Vdc?

I have an autoranging multimeter and many AA batteries.... how do I interpret the readings when deciding to keep or discard AA (1.5 volt) batteries?

I found a sensor recently that emits ±90V (AC) on stimulus. How would I go about reading this from an arduino? Update I didn't think there were so many options. :) The kind of …

I have a bunch of green LEDs (not super bright), the plastic around the actual LED is physically green, but they did not come with a turn on voltage. 3V seems to work but they're n …