dBm to Internet Speed
In this post we show how Internet Speed (Mbps) varies with the received signal strength or RSSI (dBm), using measurements. Wi-Fi Network Planning When planning your Wi-Fi network, use this …
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Do Resistors in Parallel have the Same Current?
Parallel resistors do not have the same current flowing through them. The current through each resistor depends on Example Current Calculation For a three resistor network (R1 = 10 Ω, …
Longest Range TV Antenna (Do the marketing claims make sense?)
The range of TV antennas seems to increase with every passing year. The last time I checked it was 200 miles. This year in 2023 we now have 300 mile …
What is the ADC Sampling Rate of the Raspberry Pi?
The sampling rate of the Raspberry Pi ADC is 500 kilo samples per second (kSPS). In this post we explain the sampling rate numbers of the Raspberry Pi Pico’s Analog-to-Digital …
5V to 3.3V Voltage Divider
Contents1 Introduction2 Calculator3 Formula4 How to Pick Resistor Values5 Related Posts and Calculators Introduction In many circuit applications there is a requirement to drop 5 Volt down to 3.3 Volt. …
Razer Hyperspeed vs Bluetooth
Razer mouse can use either Bluetooth or 2.4 GHz wireless to connect. A switch under the mouse allows the user to select either mode. To enable the fast Hyperspeed mode, …
Why is a Resistor Required for an LED?
A current limiting resistor is used in series with a Light Emitting Diode (LED). In this post we will explain why we need this resistor. LED Current and Voltage Specifications …
How to Improve Return Loss or VSWR
In this post we show a simple technique to improve the return loss [1] of an RF component like a mixer or amplifier. A good VSWR to aim for is …
TRP vs EIRP
Total radiated power (TRP) is the total power radiated by an antenna. It is a function of the output power from the transmitter and the antenna efficiency. As the antenna …
What is the Arduino ADC Sampling Rate?
The maximum sampling rate or speed of the Arduino’s Analog-to-Digital converter is 15 kilo-samples per second or 15,000 samples per second. In this post we get into the details – …