Door control system/Logbook: Difference between revisions
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* The board no longer flashes the outputs on boot, but does when the reset button is pressed. | * The board no longer flashes the outputs on boot, but still does when the reset button is pressed. | ||
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* Rebuild darlington/relay board | * Rebuild darlington/relay board | ||
* Use a solid state relay (no darlington required) | * Use a solid state relay (no darlington required) | ||
=== Problem 2 === | === Problem 2 === | ||
Revision as of 19:30, 27 September 2010
See also http://github.com/londonhackspace/Doorbot/commits/master
2010-09-27
Operator: Mark
Problem 1
Identified by solexious at the weekend
- Arduino resets on serial open() from bifferboard
- Arduino flashes digital outputs high on reset
- Digital output flashing high triggers door open (this seems to be getting worse over time)
Tried:
- Disabling DTS (didn't work)
- Pull-down resistor (10k to 1k)
- Physical reset button on arduino (it also makes the pins flash)
- 120 ohm resistor between 5V and RSET on arduino - works :D
- The board no longer flashes the outputs on boot, but still does when the reset button is pressed.
Workaround:
- Open serial port on boot
- Hope it doesn't restart
To try:
- Replace diode on solenoid
- Resistors to reduce sensitivity of darlington
- Use a capacitor to smooth over the reset pulse, requiring > 1 second to trigger relay
- Rebuild darlington/relay board
- Use a solid state relay (no darlington required)
Problem 2
- Chocolate block "plug" is loose, sometimes causing loss of power at slightest touch
To try:
- Replace with header/plugs
Problem 3
- Flashing arduino has stopped working (stk500v1: no response)
To try:
- Another arduinio
Problem 4
- Rootfs went away at 4:04am
