This small board has been designed to convert TTL (Transistor-Transistor Logic) level signals to RS-232 interface and vice versa. This allows the user to develop applications so that the board will act as an intermediate for the communication between the two devices that follows TTL and RS-232 standard. The TTL side is a 4-pin connector and the RS-232 side is a 9-pin female connector. if the board[..]

Using oxygen recombination technology : maintainance free. PbCaSn alloy for plate grids: less gassing, less self-discharging. High quality AGM separtor: extend cycle life and prevent micro short circuit. ABS material : increase the strength of battery container. (flame-retardent ABS is optional). High purity raw material : ensure low self discharge rate. Silver-coated copper terminals (T1, T2[..]

A general purpose 40 pin 8051 evaluation board with just the bare essentials required for using a 8051 microcontroller - port extentions, crystal circuit, reset switch, power status and a general purpose LED. This board is perfect for building rapid prototypes and projects. The board provides port extensions for all ports and also provides an empty hole for each IO, where wires and connectors can [..]

This is programmer for 89 series microcontrollers like AT89C51, AT89S52, AT89C2051 and such series from Atmel. Board also supports various 8 pin serial EEPROM ICs. ZIF socket enables easy insertion and removal of devices for programming. Programming is very fast and reliable since it is USB based. No external power required since it is powered from USB port itself.