RS-232 surge protection
The following circuit are provded here to give your idea how the overvoltage protecton circuits really work and how you can easily add some protection to your c...
VGA to TV converter II
This VGA to TV converter is designed to connect VGA card to a television which has suitable 21-pin AV connector for RGB input (called EURO/SCART/Peritel connect...
Ir Receivers
Before using this or a similar device, their data sheet should be read carefully and any power supply recommendations should be followed to prevent false output...
Universal Infrared Receiver
Briefly it`s an Infrared receiver which communicated with your pc to command many windows application, so once you have built the interface, programmed the pic1...
Vga to tv Converter
I realized the first schematic shown here, cause it`s more simply, but I took all informations about the other pins from the second schematic, click the buttons...
ISOLATED FULL DUPLEX RS232C INTERFACE
This self powered interface circuit electrically isolates the TxD and RxD lines from the PC serial port and protect the PC from direct connection to hazardous v...
PAL/NTSC Video Time/Date Generator
The following design is capable of overlaying the time and date onto any existing PAL (or optionally NTSC) composite video signal. It is housed in a very neat a...
LASER Transmitter/Receiver
This set of two circuits from the basis for a very simple light wave transmitter. A LASER beam is modulated and then aimed at a receiver that demodulates the si...
Doorphone Intercom schematic
In this doorphone circuit,an 8 ohm speaker is used both as a microphone and also an output device. The BC109C stage amplifies in common base mode, giving good v...
Doorphone Intercom schematic
In this doorphone circuit,an 8 ohm speaker is used both as a microphone and also an output device. The BC109C stage amplifies in common base mode, giving good v...
RS485-like multi-drop bus
PBUS is an RS485-like multi-drop bus for interconnecting PIC and other microcontroller-driven devices. Protocol and software is written by Jap. Just include a s...
RS485-like multi-drop bus
PBUS is an RS485-like multi-drop bus for interconnecting PIC and other microcontroller-driven devices. Protocol and software is written by Jap. Just include a s...
RS232 Connections wiring up
While the normal PC hardware might well run with just Tx, Rx and Ground connected, most driver software will wait forever for one of the handshaking lines to go...
RS232 Connections wiring up
While the normal PC hardware might well run with just Tx, Rx and Ground connected, most driver software will wait forever for one of the handshaking lines to go...
NTSC(YC/RGB) to VGA Scan Converter
This is a video scan converter to display NTSC video signal into VGA monitor. Normally, the VGA monitor occupies most desk top space, so that everybody will be ...
NTSC(YC/RGB) to VGA Scan Converter
This is a video scan converter to display NTSC video signal into VGA monitor. Normally, the VGA monitor occupies most desk top space, so that everybody will be ...
Diagram description GPS support kit
The GPS interface can be fed in 2 ways: with a stabilized 5V supply or with a 10 to 25V unregulated DC supply. In both cases the power is fed into the RJ45 con...
Diagram description GPS support kit
The GPS interface can be fed in 2 ways: with a stabilized 5V supply or with a 10 to 25V unregulated DC supply. In both cases the power is fed into the RJ45 con...
GPS receiver
This GPS receiver is powered by 2 AA batteries. They are only strong enough for the GPS to stay on for about two hours, and this seems like quite a waste. I wou...
GPS receiver
This GPS receiver is powered by 2 AA batteries. They are only strong enough for the GPS to stay on for about two hours, and this seems like quite a waste. I wou...