Aug 12, 2018 - Side effects of the programming itself: are there other devices on the SPI. *The existing in-system driver software may be able to disconnect. MC68HC908GP32 for microcontroller programming circuit running from the computer serial RS232 port. Circuit of the bill of materials, schematics, PCB drawings there. MC68 Programmer This programmer was designed to program the Motorola MC68HC908GP32 micropocessor, in.

Electronic Tools Dev'rs - DIYTools Do you develop for other things? Electronic Tools Dev'rs 'News & info related to do-it-yourself electronic tools.' Apps Circuits DIYTools Docs Eprom Emulators 2001-07-09 - - Posted by: Jeff Frohwein Here's a 27C040 (512k byte) eprom emulator circuit and a version. THESE PLANS ARE OFFERED 'AS IS'.

DO NOT ASK FOR HELP GETTING IT TO WORK OR FOR MORE INFO. TOO MANY REQUESTS ARE RECEIVED TO ANSWER THEM ALL. Measurement 2000-08-19 - - Posted by: Jeff Frohwein It is a 32 Channel, 40Mhz, fully PC controlled TTL/CMOS logic analyser with internal/external triggering and trigger delay. Internal triggering is fully maskable (High/Low/Don't Care) on all 32 channels. The whole things fits on one single sided PCB with virtually no wiring. 2000-05-14 - - Posted by: Jeff Frohwein BitScope is a low cost data acquistion device configured as an RS-232 perhiperal. Used with a PC it can implement a dual channel 100 Mhz Digital Sampling Oscilloscope and 8 channel Logic Analyzer.

PCBEtch 2000-03-20 - - Posted by: Jeff Frohwein PCB etch tips, RF prototyping with copper tape, cheap RF remote control. 2002-04-17 - - Posted by: Great schematic capture and PCB layout software can be had from The Eagle layout system comes with schematic capture, parts editor, PCB layout, and autorouter. Caveats: schematics are limited to one sheet and boards to 100 x 80 mm and two sided. 2000-03-20 - - Posted by: Jeff Frohwein Using the Positive Proof Photo-etching system. 2000-03-20 - - Posted by: Jeff Frohwein 'How to make really good homemade PCBs'.

2000-03-20 - - Posted by: Jeff Frohwein Using sheets. Programmers 2000-04-04 - - Posted by: Jeff Frohwein Here's a PDF document describing a cable that can be built to program Altera 9000, 9000A, 7000A, and 7000S devices & configure FLEX 6000, 8000, and 10K devices in-circuit using a standard parallel port. 2000-11-02 - - Posted by: Jeff Frohwein This is mainly a satellite dish hacking site but it contains all kinds of easy to build programmers for various memory & computer chips. 2000-06-09 - - Posted by: Jeff Frohwein Supports Lattice GALs & Microchip PIC16F84. 2000-04-23 - - Posted by: Jeff Frohwein Schematics & C source code for this very simple EPROM programmer design. 2001-07-09 - - Posted by: Jeff Frohwein Here's a build-your-own programmer & for those on a limited budget.

I used these in order to come up with this circuit. It can only program 5V only memory so it can't program EPROMs or some EEPROMS. It's designed to be simple & inexpensive rather than a program-everything circuit.