I've built an AM tube transmitter. I don't have much experience in electronics. Can you please verify this circuit and tell me if it would work or how can I improve its performance? It uses an Armstrong oscillator to make the carrier frequency.
I have implemented a WPT system with communication in both ways using ASK. When I connected communication part on RX side the same way as on TX, there just was not enough amplitude change to be detectable on TX side. So I made communication part using two mosfet and capacitor. That was...
Been struggling to find information that I find to be obviously missing on how to interpret antenna radiation patterns. For example have a look in the datasheet for my chip antenna. I can understand the three 2D radiation pattern graphs, one for each plane, what I don't understand is what...
I'm using cc1350 hardware amd transmit packets with mode 1 (legacy mode) that on the receiver side over mode 1 (legacy mode) I get wrong decryption of the received packet.
over DSSS=8 I must get and see the patterns 11001100 or 00110011 according to TI handbook's table found above the...
I am trying to program/communicate with the CC2450 BLE IC, which is a transceiver/microcontroller. My computer is having trouble recognizing the device. It does not show up in Device Manager. I've tried the T.I. tools for trying to communicate with it. I've downloaded the BLE...
I have been using a pair of Sennheiser headphones for quite some time now (HDR 118). They offer good sound and sit comfortably, however they do work based on RF signals (863 - 865 MHz) and have been catching a lot of interference as of late.
Instead of just getting a new pair of...
I'm looking for a Magnetic Resonant Wireless Evaluation kit ( with Transmitter and Receiver boards or chips)
I can't find it on the Internet and I want to buy it.
The distance between the Transmitter to the Receiver has to be at least 5 cm.
Project Goal: Feed my fish! Tidy up and get rid of conduit and wires running eveywhere!
Current Setup: I have 12 Fish Feeders powered by a DC motor, and I run all the wires run along the walls in conduit back to the controller. Each color represents one fish tank. ("1-4" feeder...
So I have been working on a wireless charger for EV applications. The prototype I designed uses a control system to manage the voltage at the exit of the charger. Without going too deep, we can just assume the charger is a source supplying a square signal of 15 Volts of 150kHz...
So this is a project that's on its second iteration, having trusted the previous PCB designer and ending up with some expensive PCB-shaped coasters, have learned quite a bit myself and also asked for help from another more experienced engineer. Looking for some feedback on this RF feedline...
I've designed a matching network for a PCB Loop Antenna and I've tried to match it to a source of 465 Ohm impedance with 1pF parasitic capacitance i.e.
Source Impedance = (166 -j223) Ohm
Ideal Load Impedance = (166 + j223) Ohm.
I've used Tapped Capacitor Matching network as suggested in this...
I'm trying to build a radio beacon that would be mounted on a cat collar.
The goal is to get the distance of the cat
- every 10 seconds.
- for ≈ a month
- with a ≈ 30 metters range detection
- through walls
- can fit on a cat collar (battery + electrical components)
Would it be possible...
Hi, can anyone help me with ideas on building devices that produce an audible signal when come close to each other, say 2 meters or less. Both devices continue signalling until they are two or more meters apart. Think about a microphone moved close to a speaker - you hear an unpleasant...
I have limited electrical knowledge so would like to ask if anyone can recommend a solution to a system I would like to have installed. I can have an electrician install it but as it is my concept I would like to identify the best way to configure it.
We use HP air for testing at work and as a...