Showing only posts by YRabbit. Show all posts.

Antenna for 4G Modem

Current reading: SINR/RSRP: 20 dB / -95 dBm. Do I need an antenna? Not sure. Would it be fun to make an antenna? Certainly! So let's get started:)

Simulation accuracy

First, I want to make sure that openEMS (the modeling system I plan to use) is calculating correctly. Let's take …

FPGA and a rotary encoder

How to program an FPGA to work with such simple input / output devices as a rotation angle sensor and LED indicator.

When I studied FPGA in the begining, I really wanted to have some kind of visible response to my program. The built-in RGB LED became old quickly, in particular …

DIY PS/2 keyboard adapter

On the one hand, the adapter accepts keystrokes from the standard PS / 2 keyboard, and on the other hand, manipulates the input lines of the 1801VP1-014 chip by pretending to be a matrix of keys. The number of AtMega8 outputs is increased using a shift register. The firmware is written …