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This project is about signal processing of bat echolocation audio recorded through a pair of ultrasonic * one cycle of a 40 kHz bat signal consists of '''6''' samples

...ogether and connected to the coax under test via the SMA. I'm just using a signal generator to provide the first schmitt trigger with a square wave, but you

...vel-converter boosts the pulse waveform to about +10 and -10V for a strong signal into the transmitter transducer ...eceive side, a TL074/LM324 quad opamp is used to amplify the received echo signal

If the signal must be received in a certain space, one can make two loops at any two oppo To get an idea of signal distribution and decay, use this: https://www.falstad.com/vector3dm/ ("curr

...ft; padding-right: 0.5em; padding-bottom: 0.5em;" />Last thursday, [http://signal.hackerspaces.org/archive/2010-08-26-2200-dub-and-dubious-politics.ogg the f The show aired on the digital radio station [http://signal.hackerspaces.org Signal], the hackerspace radio. Every thursday between 22:00 CEST and 00:00 CEST,

-Accepts line-ish level or piëzo contact microphone signal on the input.

SIGNAL\r

In order to be able to make live radio for [http://signal.hackerspaces.org/ Signal], and because we can, we have a radio studio in the space. It is sharing a

! Signal | D2 || ZG-C || ZG01 clock signal

...on is that the smoothing capacitor has been removed, resulting in a 100 Hz signal going into the optocoupler (a pulse during each zero crossing). An interrupt is generated for each falling edge of the signal coming out of the optocoupler. This happens during the zero crossing, so tw

...ed on audio and [http://signal.hackerspaces.org/echtehackers/ available on Signal]. Most of the sessions are in Dutch, but the talk by MEP for the Swedish Pi

At the top of the spectrogram you see the data portion of the signal, consisting solely of up-chirps. ...ed by a Semtech chip. This allows for a more compact representation of the signal for analysis.

** hansg: support voor image signal processor (camera) in favoriete skere tabletSoCjes, nog maar ~200 patches t

It appears the Altera chip drives two 245 chips which in turn drive the signal to the connector J1 to the LED board. * J1.1: IC2.A1 -> IC2.B1 -> via ... -> SRCLK signal of both column shift registers

...hat the ADS-B signal arrived at the different receiver stations (the radio signal moves at the speed of light!).

| 1N4148 || 500 || small signal diode || 368106 || 2.00 |BC547 || 200 || small signal NPN BJT, higher voltage then BC558 || || || availible need to count

...room antenna, to transmit a low-power GNSS signal that is a copy of a GNSS signal picked up on the roof. The signal is intended only for devices present in the room.

...t is still quite finicky and still not sensitive enough and needs a lot of signal to work properly.

* SCL signal from I2C * SDA signal from I2C

* 9 Sep 2010 - Broadcast [[http://signal.hackerspaces.org/ Signal]] Hackerspace Hour