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6
votes
4answers
197 views

Time of flight difference in hardware

I have an ultrasonic emitter, and two ultrasonic receivers. When the emitter emits a pulse, the receivers get the signal at different times. I am only interested in the difference between the two ...
3
votes
2answers
110 views

arduino pulse to transistor power maximum

Hello I want to get a confirmation that what I am doing is not going to fry my Arduino Mega. The sketch I am using to send a pulse out on pin 8 to a 2n3055 that is switching 12 volts is this: ...
1
vote
1answer
165 views

Generate DC pulse after switch turned off?

I've got a power source (say 12V DC) that I'm monitoring with a relay. I want to send a pulse (over 5V DC) to another relay for 60 seconds after the first power source has been turned off. A ...
1
vote
2answers
266 views

P-Channel Depletion Mode MOSFET for Negative Pulses

Would a p-channel depletion mode MOSFET make the most sense if the goal is to produce a high-voltage negative square pulse? My reasoning: MOSFET, because we're talking about a kV square pulse with ...
1
vote
0answers
28 views

Why do my outputs look exactly the same for the Allegro 3901?

I am trying to capture results shown in Figure 8 of Allegro 3901 data sheet . My circuit looks like this: The channels above coresspond to the oscilloscope screen captures below: In the image ...
0
votes
1answer
119 views

High power pulse generator

I'm designing a relatively high power pulse generator. Basically I have a microcontroller generating a clean square wave (0-3.3 V or 0-5 V) which then goes into my amplification circuitry. I want to ...
0
votes
1answer
236 views

Arduino beacon for IR Seeker v2 (Mindstorms NXT Sensor) - Pulse IR at 38Khz Carrier and 1200 Frequency

I hate to ask a question like this, that is kinda just like "give me the code" but seriously. I've tried reading up on it everywhere, and I just don't seem to get a thing of having both a carrier ...
-2
votes
1answer
77 views

microcontroller for heart rate meter [closed]

I have pulse meter which gives only filtered signal. I think it's form doesn't need explanations (periodic beats). I need some microcontroller 3-5V, which would switch scheme (sensor) on, collect ...