Radio Electronics 1989-05

Mc With The Power On

The PC communication program should set the IBM PC serial port to 9600 bauds, no parity. When power is applied to the programmer, the programmer will then send the on line message to the PC. At this time, the user may enter any of the programmer commands. Table 1 is a list of the available commands. Commands are executed when the letter is sent to the programmer followed by the enter or cr character (the l, d, and m commands do not need the enter). Any character other than enter or cr stops...

Pc Electronics Paxson Lane Arcadia Ca

TOM (W6QRG) & MARYANN (WB6YSS) O'HARA ELECTRONICS 33cm (902-928 MHz) ATV SYSTEMS Get on the new band with these modules, snow -free line-of-sight DX is 10 miles running 1 watt 23 element beams and our GaAsfet downconverters. Use for full duplex ATV with your 70 cm system, crossband repeater, links, or get away from the crowd and interference. The TX33-1 and RTX-33 ( 289 ea) transmitters are in design and will be available early fall. The features will be the same as theTX23-1 and RTX-23...

Mc68701 Programmer

The programmer requires a 9 V to 12 V power supply. The Radio Shack 9 V, 1-amp wall supply works fine. A TL497 switching regulator operating in step-up mode is used to generate the programming voltage. It is set to 26 V and can easily supply the 50 mA required for programming the MC68701. The 26 V dc is applied to the MC68701 reset pin through a 2N2222 transistor. The resistor and capacitor connected to the base of the transistor form the reset delay circuit. The Zener diode connected to the...

May Qex Advertising Index

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