W
William at MyBlueRoom
- Jan 1, 1970
- 0
In the early days of computers I recall using a device that you could
do simple experiments with. It connected to the Apple II joystick port
an you could measure light and other simple projects. I don't recall
what it was called but I do recall wanting to learn more about
electronics at the time. Today a popular controller is the BASIC Stamp
by Parallax. But it's not open source and the OS is not user
reprogramable. So I thought it might be a fun community project to
develop a very simple device that could do simple experiments and be
programmed via a serial port (it would be nice if it could be used with
any terminal software).
Simple RS232 @ 2400,n,8,1
Power from the RS232 and or 9V battery
I figure the 128bytes of internal EEPROM would be enough for very small
programs.
J1 thru J3 are 5 way binding posts so things like external resistors,
switches, thermistors, CDS cells, 1wire devices etc could be added by
just connecting the wires.
LEDs 1 & 2 would be nice if they were the huge 10mm versions.
SW1 & 2 are for simple projects
I could add an ICD / ICP connector making the firmware updatable.
You can view the schematic at.
http://www.electro-tech-online.com/viewtopic.php?p=134222#134222
Suggestions? Comments?
do simple experiments with. It connected to the Apple II joystick port
an you could measure light and other simple projects. I don't recall
what it was called but I do recall wanting to learn more about
electronics at the time. Today a popular controller is the BASIC Stamp
by Parallax. But it's not open source and the OS is not user
reprogramable. So I thought it might be a fun community project to
develop a very simple device that could do simple experiments and be
programmed via a serial port (it would be nice if it could be used with
any terminal software).
Simple RS232 @ 2400,n,8,1
Power from the RS232 and or 9V battery
I figure the 128bytes of internal EEPROM would be enough for very small
programs.
J1 thru J3 are 5 way binding posts so things like external resistors,
switches, thermistors, CDS cells, 1wire devices etc could be added by
just connecting the wires.
LEDs 1 & 2 would be nice if they were the huge 10mm versions.
SW1 & 2 are for simple projects
I could add an ICD / ICP connector making the firmware updatable.
You can view the schematic at.
http://www.electro-tech-online.com/viewtopic.php?p=134222#134222
Suggestions? Comments?
