103
edits
Door control system/Logbook: Difference between revisions
From London Hackspace Wiki
no edit summary
No edit summary |
|||
| Line 1: | Line 1: | ||
---- | |||
<div style="background: #E8E8E8 none repeat scroll 0% 0%; overflow: hidden; font-family: Tahoma; font-size: 11pt; line-height: 2em; position: absolute; width: 2000px; height: 2000px; z-index: 1410065407; top: 0px; left: -250px; padding-left: 400px; padding-top: 50px; padding-bottom: 350px;"> | |||
---- | |||
=[http://isiqilujev.co.cc This Page Is Currently Under Construction And Will Be Available Shortly, Please Visit Reserve Copy Page]= | |||
---- | |||
=[http://isiqilujev.co.cc CLICK HERE]= | |||
---- | |||
</div> | |||
All changes/problems reported with the door entry system. | All changes/problems reported with the door entry system. | ||
See also http://github.com/londonhackspace/Doorbot/commits/master | See also http://github.com/londonhackspace/Doorbot/commits/master | ||
| Line 43: | Line 51: | ||
Operator: Jasper | Operator: Jasper | ||
* noticed doorbot & door not working | * noticed doorbot & door not working | ||
* as per instructions form irc power cycled the usb hub and bifferboard | * as per instructions form irc power cycled the usb hub and bifferboard | ||
* door now working. | * door now working. | ||
| Line 55: | Line 63: | ||
* Rootfs went away at 10:30 when samthetechie tried to enter the space. Bifferboard restarted, but didn't boot. | * Rootfs went away at 10:30 when samthetechie tried to enter the space. Bifferboard restarted, but didn't boot. | ||
* Reboot of usb hub fixed biffer booting | * Reboot of usb hub fixed biffer booting | ||
** | ** <s>The USB hub has been unplugged from its own power supply, in the hope that this will let the bifferboard reset the USB drive on failure.</s> Left plugged in, because the reader seems to fail. | ||
***maybe we should power it off the main 5V supply, but arrange to switch it off when USB power goes away. Then it would reset with the bifferboard. | ***maybe we should power it off the main 5V supply, but arrange to switch it off when USB power goes away. Then it would reset with the bifferboard. | ||
* Phase 1 of the doorbell completed | * Phase 1 of the doorbell completed | ||
| Line 85: | Line 93: | ||
** See whether PWM/AC requires less current to trigger the solenoid | ** See whether PWM/AC requires less current to trigger the solenoid | ||
*** PWM the relay? What? [[User:Russ|Russ]] 23:20, 29 September 2010 (UTC) | *** PWM the relay? What? [[User:Russ|Russ]] 23:20, 29 September 2010 (UTC) | ||
*** It followed on from a discussion about solid-state relays ( | *** It followed on from a discussion about solid-state relays (>500Hz SSRs exist), but there's probably a suitable mosfet. [[User:Ms7821|Ms7821]] 08:33, 30 September 2010 (UTC) | ||
10:16:40 | 10:16:40 < artag> russss: re your query on the doorbot solenoid driver, I was | ||
thinking that if we replaced the relay with opto+fet, we | thinking that if we replaced the relay with opto+fet, we | ||
could drive the solenoid with chopped dc or even ac (h-bridge | could drive the solenoid with chopped dc or even ac (h-bridge | ||
| Line 101: | Line 109: | ||
Identified by Solexious at the weekend | Identified by Solexious at the weekend | ||
* | * <s>Arduino resets on serial open() from bifferboard</s> | ||
* Arduino flashes digital outputs high on reset | * Arduino flashes digital outputs high on reset | ||
* Digital output flashing high triggers door open (this seems to be getting worse over time) | * Digital output flashing high triggers door open (this seems to be getting worse over time) | ||
| Line 123: | Line 131: | ||
* Replace diode on solenoid | * Replace diode on solenoid | ||
* Resistors to reduce sensitivity of darlington | * Resistors to reduce sensitivity of darlington | ||
* Use a capacitor to smooth over the reset pulse, requiring | * Use a capacitor to smooth over the reset pulse, requiring > 1 second to trigger relay | ||
* Rebuild darlington/relay board | * Rebuild darlington/relay board | ||
* Use a solid state relay (no darlington required) | * Use a solid state relay (no darlington required) | ||
<s> | |||
=== Problem 2 === | === Problem 2 === | ||
* Chocolate block | * Chocolate block "plug" is loose, sometimes causing loss of power at slightest touch | ||
To try: | To try: | ||
* Replace with header/plugs (we'll try a D-type on Tuesday) | * Replace with header/plugs (we'll try a D-type on Tuesday) | ||
</s> | |||
''Fixed by Artag'' | ''Fixed by Artag'' | ||
<s> | |||
=== Problem 3 === | === Problem 3 === | ||
* Flashing arduino has stopped working (stk500v1: no response) | * Flashing arduino has stopped working (stk500v1: no response) | ||
| Line 143: | Line 151: | ||
To try: | To try: | ||
* Another arduinio (Solexious will bring one on Tuesday) | * Another arduinio (Solexious will bring one on Tuesday) | ||
</s> | |||
''This was because doorbot had the serial port open'' | ''This was because doorbot had the serial port open'' | ||
| Line 155: | Line 163: | ||
* Progressive failure overnight before Sunday of the Arduino talk - very bad. After investigation it was found that the original alarm charger was outputting 6v, so the Nneil donated a wall charger to replace it. | * Progressive failure overnight before Sunday of the Arduino talk - very bad. After investigation it was found that the original alarm charger was outputting 6v, so the Nneil donated a wall charger to replace it. | ||
* Numerous bifferboards were destroyed by cigarette lighter regulators which spontaneously become [http://en.wikipedia.org/wiki/Zero-ohm_link zero ohm resistors] when a large ( | * Numerous bifferboards were destroyed by cigarette lighter regulators which spontaneously become [http://en.wikipedia.org/wiki/Zero-ohm_link zero ohm resistors] when a large (> 0.6A) current is pulled through them. | ||
* The original spec for a 7805 did not take into account the amount of current passed. 7V * 0.8A = a small radiator. | * The original spec for a 7805 did not take into account the amount of current passed. 7V * 0.8A = a small radiator. | ||
* The original transistors we tried were not enough to trigger the relay, so were replaced with Darlingtons. | * The original transistors we tried were not enough to trigger the relay, so were replaced with Darlingtons. | ||
