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In circuit eeprom programming Has anyone tried this? I'd like to leave a capability to program an eeprom in circuit, when its normal operation is as a prom. Its address lines are driven by normal 74HC... |
Thursday, 20 January 2022 - 07:50 |
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PAL - a modern equivalent for combinational logic Having ploughed through the internet and any number of data sheets, I keep bouncing off the 16L8 currently supplied by Rochester Industries. https://www.digikey.co.uk/en/pro...... |
Tuesday, 23 November 2021 - 09:32 |
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Doh... I spent some time debugging yesterday... I use an LM358 as a level converter, and was getting no output from it... not a twitch. So I changed it. Not a twitch. So I changed... |
Saturday, 17 July 2021 - 06:02 |
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Problems with LDO regulator AZ1117lH-TRG3.3 I'm having heavy headaches with the LDO regulator of the title... they work when initially tested (either dead bug or on an otherwise empty PCB) but I've had a better than 50%... |
Wednesday, 7 July 2021 - 14:22 |
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AP2204K - how hot is too hot? https://www.mouser.de/datasheet/... I'm using one of these in the smallest packet (SOT-23-5) and discovered too late that my display is taking rather more current than... |
Wednesday, 12 May 2021 - 05:42 |
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Aaargh debugging! Slowly pulling out my hair here... in general programming because the processor is an ARM STM32L073. I have a widget which talks on two serial ports; on one to a PC via a... |
Sunday, 4 April 2021 - 19:51 |
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How big is ~uint8_t? SERIAL_RESPONSE tx_bosch (int fd, uint8_t tx_byte, RESPONSE_TYPE response) { uint8_t rx_byte; < stuff that sends tx_byte and receives rx_byte > retval = ((... |
Tuesday, 23 February 2021 - 22:20 |
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Efficient storage of and access to variable length collections of strings I have a lot of strings in multiple languages (as a basic i18n attempt for an embedded project) and I've been playing with ways to access and store them. They are of two types;... |
Thursday, 7 January 2021 - 09:03 |
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I know nothing about bluetooth, so... <SOLVED> This seems like a good place to ask. What I want to do is drop an inexpensive module onto a design such that when connected to linux, windows, or mobile phone (the last is... |
Wednesday, 2 December 2020 - 22:00 |
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strcmp() Bounced of another odd one, about which I should have known better: strcmp() where one of the two inputs is null gives, on this 64-bit Linux/GCC C system, a segfault. It... |
Thursday, 5 November 2020 - 10:29 |
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Apropos casting... Just as an example, and only because it slowed me down for a moment or two... while ((uint16_t)regs.pc != next_instruction_address) { interpret_and_disassemble(); }... |
Saturday, 31 October 2020 - 19:53 |
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[Linux] what's going on here then? Linux does not have an equivalent to the conio.h getch() and kbhit() which respectively return a single character from the keyboard and return true if a key is waiting; to get... |
Friday, 18 September 2020 - 22:09 |