Search found 952 matches

by basicchip
Sat Jun 08, 2019 5:36 pm
Forum: Software issues
Topic: TCL versions are mismatched
Replies: 1
Views: 267

Re: TCL versions are mismatched

TclTerm.exe is the standalone compiled version of TclTerm.tcl

I don't know if there were really sufficient changes in TclTerm to warrant releasing a newer compiled version, but I'll put it in the queue.

BASICtools includes TclTerm.tcl by source (Tcl keyword) the .tcl file
by basicchip
Sat May 25, 2019 11:42 pm
Forum: Software issues
Topic: RTC_hooks
Replies: 1
Views: 284

Re: RTC_hooks

Way back when the LPC21xx devices and many other RTCs, actually had hardware to count seconds to minutes to hours to days to months to years including leap years. That is actually a lot of hardware. These days most RTCs, are just done by counting milliseconds or seconds and then letting the software...
by basicchip
Tue Mar 26, 2019 12:45 am
Forum: Future products
Topic: BASIC for Pokitto
Replies: 0
Views: 612

BASIC for Pokitto

We ported BASIC to the Pokitto learning system. It is based on the LPC11U67, with a small screen and some buttons. Actually it looks like a great tool for teaching embedded programming to young students. And we want to see engineers starting their education. The website for Pokitto is here https://w...
by basicchip
Mon Mar 25, 2019 2:44 am
Forum: Projects
Topic: DIY WiFi Programmable Thermostat
Replies: 31
Views: 19554

Re: DIY WiFi Programmable Thermostat

After the experiments, I have a very preliminary schematic for the Web enabled thermostat. Still need to connect the dots, and add some bypass caps. Should be doing a layout this week.
thermo1.jpg
thermo1.jpg (110.66 KiB) Viewed 530 times
by basicchip
Mon Mar 25, 2019 12:03 am
Forum: Projects
Topic: DIY WiFi Programmable Thermostat
Replies: 31
Views: 19554

Re: DIY WiFi Programmable Thermostat

So did some quick tests of a power supply circuit. For a while I was thinking of more complex circuits, but have settled on using a diode bridge into a cap with an OKI-78SR switching regulator that outputs 5V and can tolerate up to 36V input. I hooked that 5V through a resistor to a LiPoly battery. ...
by basicchip
Sun Mar 24, 2019 9:48 pm
Forum: Projects
Topic: DIY WiFi Programmable Thermostat
Replies: 31
Views: 19554

Re: DIY WiFi Programmable Thermostat

I think the most challenging part of the design is the power supply. You've got 24V AC coming in, that you can draw maybe a max of 30 mA before you trigger the heater controller to demand heat. And it also has to run for many hours while heat is demanded at maybe near 0V. Though in my case I found I...
by basicchip
Sat Mar 23, 2019 3:01 pm
Forum: Projects
Topic: DIY WiFi Programmable Thermostat
Replies: 31
Views: 19554

Re: DIY WiFi Programmable Thermostat

Well I should try to finish this up before I turn the system off for the winter. Still taking measurements of the heating controls, and will do that via WiFi with the final setup. Made one more modification to the current control. I shorted the 3 downstairs zones together and disabled the 2 thermost...
by basicchip
Sat Mar 16, 2019 5:21 am
Forum: Projects
Topic: web based clock
Replies: 28
Views: 7832

Re: web based clock

Still using an older nodemcu, have not had success with the cloud built versions, and no time to figure out why.

So here is the flash application and firmware I am using--

https://www.coridium.us/files/esp_flash_nodemcu.zip
by basicchip
Thu Mar 14, 2019 8:55 pm
Forum: Serial Communication
Topic: Difference between UART and USART
Replies: 1
Views: 390

Re: Difference between UART and USART

USARTs will have a synchronous serial function. So you would have the normal 2 data lines and 1 or 2 clock lines.

They are used for some older systems, and in theory can run at faster rates.
by basicchip
Sun Mar 10, 2019 4:39 pm
Forum: Projects
Topic: web based clock
Replies: 28
Views: 7832

Re: web based clock

"Final" code for the clock, yeah right timeLord.bas #include "WiFiLogin.bas" #include <STRING.bas> #define TIME_LORD #define OFFLINE -1 #define NO_NET -2 #define LPC11U37 ' fake out pre-processor while testing on LPC824 ' globals hr = 0 ' define hour min = 0 ' define minute retry_count=0 ' retries d...