Post Created date
Samsung hikes semi prices by 20%
I wonder if there is any shortage on 555's and 431's?  'cos just about everything is is near unobtainium.   It's probably a good time to be in the e-waste business...
Sunday, 12 June 2022 - 03:37
microsemi Polarfire FPGA, IS IT POSSIBLE TO USE MIV core to control SPI?
Cliff, Microchip bought Microsemi!
Tuesday, 22 March 2022 - 10:34
All the bugs...
To be sure, to be sure! or maybe you’re relying to heavily on the ‘luck of the Irish’?
Wednesday, 16 March 2022 - 17:13
Odd Frequency Crystal Needed
Silabs amongst others have programmable frequency generator chips. Just Googled - Skyworks bought these off of Silabs. One part might he the SI5332. They claim ‘low jitter’. I...
Monday, 10 January 2022 - 20:02
Simple open source GPIB controller with AVR processor
Seems quite a few people still use GPIB. I recently was involved in the design of an upgrade board for the HP series 80 computers which were widely used as controllers for testing...
Monday, 27 December 2021 - 11:36
Interrupts and inline assembler
if you AVR has a timer with input capture, I'd be looking at using that - it will help measure the bit time for you.
Tuesday, 16 November 2021 - 22:35
Soundtracs CM4400
Ahhh, the thot plickens! Got some bin files but the one that looks useful expects another eprom :( how do I know this? I disassembled it and spotted a number of external...
Sunday, 14 November 2021 - 08:28
Soundtracs CM4400
Doc, i suspect the chip has major issues as the logic levels are not correct. So reprogramming it would not solve the problem. Apart from the stored charge leaking away, there’s...
Wednesday, 10 November 2021 - 03:01
Soundtracs CM4400
I have a Russian 2764 eprom that is light sensitive as you describe! The eprom in question is a TI 2516 with quartz window with a sticker on it. The issue seems to be the logic...
Tuesday, 9 November 2021 - 15:25
Soundtracs CM4400
I could clean the sockets ad infinitum, but that won’t fix a dodgy eprom will it? The poor thing is suffering chip rot rather than bit-rot.  
Tuesday, 9 November 2021 - 12:32
Soundtracs CM4400
Candyman - been down that path. “ never had a z80 or eprom die in 30 years” was the response. I can tell you the eprom is very suspect. Heated it, froze it - it reads ...
Tuesday, 9 November 2021 - 10:39
Confusing Atmega128 UART communication circuit
Modern max232 chips use 100nF capacitors. The term ‘DECAP’ is confusing. You mean ‘decoupling’ or ‘bypass’ capacitor.
Tuesday, 9 November 2021 - 06:16