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Tag Archives: electronics

Accurately measuring cable length with NanoVNA

Having a VNA opens up so many possibilities. Just last week, I reviewed the nanoVNA and found to be an interesting device to have. Having handled expensive Vector Network analyzers (VNA) in the past and present, my excitement grew tremendously to compare it with the

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nanovna vs keysight fieldfox vna

Comparing NanoVNA with the Keysight Fieldfox N9952A

Vector network analysers (VNA) come in all sort of price ranges. Most of them are out of reach for a typical hobbyist. Very few VNAs are available to be bought by someone like you and me. For example, the $500 miniVNA and the sub-hundred dollar

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nanovna review

NanoVNA – A short review

Do you build RF circuits? Have you built any antennas? If the answer to any of the two questions is YES, then you know how valuable having a VNA (Vector Network Analyzer) is. Just an year ago the cheapest VNA on the market was the

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Using LimeSDR mini as a RF source

In one of the previous posts we saw how we could transmit DATV using LimeSDR mini. This time we are going to use our LimeSDR mini as a RF source in our home lab. The whole setup is based on GNU Radio and the QT

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RF Pulse generation with RF switch

Remember the previous post where we generated PWM? We are going to use the PWM output from the TivaC microcontroller and drive an RF switch. I will be using the Minicircuits HSWA2-63DR+ SP2T switch to generate pulsed RF output. Correspondingly, A simple SP1T switch would

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LimeSDR Mini

Getting LimeSDR Mini to work for the first time

LimeSDR is a real temptation to buy if you are an RF or a signal processing guy. We all know FPGAs give you a huge set of building blocks of the digital world and you can create whatever you want out of it. LMS7002 chip

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Homemade sound card ECG circuit

SCROLL BELOW TO SEE LATEST UPDATES 4.4 The Basic ECG Circuit We started to build the first ECG prototype circuit after doing a lot of research and studying about the requirements of the ECG system. We wanted the ECG circuit to be as simple as

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DIY ECG

Currently i am working on simple ECG circuit (electrocardiograph) using simple sound card input to view the wave forms. Required materials : LM324N – Quad op-amp 100k resistor 1k Resistor sound card some copper coins So heres how you get started: Construct the following circuit

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