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Pi Pico and other Boards 2022

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January 22, 2023

Eeprom programmer uses Mcp23008, 4040 with 28C64.

Below is 28C64

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eeprom programmer

January 16, 2023

Wanted to be able to program 28C64s and 28C256s because they looked easy and cheapish for up and coming boards, eg 1802, 6502. Was learning Vim at the time and was quite slow at getting code into Arduino IDE via Vim edit page. Also got preoccupied with tweaks and tips. Today, finally got Uno system to program clunky breadboards to read in 5 bytes and program them and verify via terminal. Here's the pic: (NB, numbers seem to be one off. Was expecting 65,66,67... but got 66,67,..Will sort it out. Here's the breadboard lashup: The schematic isn't all in one place, so that will be the next job. The main idea is to use the I2C bus of the Arduino to drive the two MCP23008s which have 8 I/O pins each. These, in turn, connect to the 28C64's I/O, and to the 4040 which generates 12 address lines and the control lines: CE*,OE* and WE*. The 28C64 was used because there were some already ordered from AliExpress and the MCP23008s were used because they were available at the local Ja...

Spud sensor update 3 August 2022

October 02, 2022

Sender WemosI going ok. This is driven by C:\Users\Dell\Documents\Arduino\WorkingOctober22\SpudSensor94H\SpudSensor94H.ino which takes values of temperature and humidity from HDU21 device,with SparkFun driver, and sends these values to Wemos II, the Listener. Listener's display on serial terminal looking a bit crude but works OK. https://pastebin.com/Fvw5NZbS is the Sender program that reads the HUD21 device and sends info. via espNow to Listener program on WemosII below.. C:\Users\Dell\Documents\Arduino\WorkingOctober22\SpudSensor94H\SpudSensor94H.ino https://pastebin.com/TGdvqSh5 is the Listener program C:\Users\Dell\Documents\Arduino\WorkingAugust22\SantosSensor7\SantosSensor7.ino (NB not ...Sensor6.ino above. Slight improvement. Next task is to tidy up listener code and include semaphore codes that help transfer file chunks from Sensor to Listener. Codes currently are 51 = normal file chunk being delivered from Sensor 59=last fule chunk-ette of extras. (<200 byte...