tv circuit
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Tuned Radio Frequency (TRF) Receiver
Superheterodyne receivers have been mass-produced since around 1924, but for reasons of cost did not become successful until the 1930s.
Superheterodyne receivers represent a pivotal advancement in radio technology, characterized by their ability to convert high-frequency signals into lower intermediate...
LCD to USB interface
LCD2USB is an open source/open hardware project. The goal of LCD2USB is to connect HD44780 based text LCD displays to various PCs via USB. LCD2USB was meant to be cheap and to be made of easily available parts. It is...
RCA CT-100 Color Television Design
If you have not already read the CT-100 restoration article, it is recommended to start there. It chronicles the discovery of a CT-100 and its restoration to working condition. This article discusses the internal components of the CT-100. After highlighting...
direct driving LCD
The LCD in question has more pins than the microcontroller. It was not possible to expand the image for a better view. Unless there is a strong preference for using this display, it is recommended to obtain a Hitachi-compliant alphanumeric...
Simple Direct Conversion Receiver
A low-cost continuous wave (CW) superheterodyne receiver operates with a 4.00 MHz intermediate frequency. While there is no automatic gain control (AGC) or RF gain control, the receiver demonstrates good large signal handling capabilities. The design incorporates six bipolar transistors...
AD8195 and DDC buffers
The DDC lines on the HDMI connector side have a pull-up resistor of 47 kOhms connected to 5V and a 2 kOhm pull-up resistor connected to 3.3V on the FPGA side. The schematic indicates that the glitch is a normal...
6-17 MHz SW reciever
Its very simple as It uses only 3 transistors 2n2222. The Coils can be altered to change the range of reception by lowering or highering the frequency. More: This circuit is a SW band receiver of range 6 to 17...
Crt yoke driver
A 500 mV peak-to-peak triangular waveform centered around ground is applied to the amplifier, resulting in a peak current of 100 mA flowing through the inductor.
The circuit involves an amplifier configured to process a triangular waveform signal with a peak-to-peak...
Wireless LCD Display (AT90S2313)
Its an adaptation of the 2X 16 LCD project, by adding a ferrite loop antenna, two resistors, and a capacitor. Here the display shows the output of the 10 bit scanning voltmeter with Minimum Mass Wireless Coupler. Both the ferrite...