Canon S100 Screen Replacement

I broke the screen on my S100 by sitting on it while having lunch on my Spanish climbing holiday.  Two sharp stones had pressed into the screen through the case, leaving it with vertical lines and blacked out parts.  I ordered a replacement display from http://www.cameraspareparts.co.uk/.  Note this is a different display from the S95, so make sure you get the right one.  It cost around £45.  You can get cheaper ones on Alibaba but it might take a long time to arrive.

It's dead easy and there are some YouTube videos around that reassure you're taking the right screws out.

Here's the broken screen...

Here is some indication of what screws you should remove...

Take the back off...

Remove the screw holding the L shaped clip and take it out...

Remove the other screw holding the button flexi PCB...

The screen and button board are now loose...

The screen has two connections.  One is very small and plugs into the button board.  I used a microscope to carefully inspect this and remove it with tweezers gripping the edges...

The other flexi connection is threaded through to the main PCB at the front of the camera.  You need to take the front off (again very straightforward but take great care not to snap the flexi connection to the ring control)...

Now if your eyes are like mine you will need a microscope to help.

You need to remove the flexi that goes to the button board by flipping up the connector catch and pulling it out.  Take great care and make sure you can see what you are doing!  Now undo the catch of the display connector and undo that.

You can now unthread the display connector and remove and replace the display.

Refitting is the reverse of the above!

And it works!...

Yay!

Dell S2409Wb Monitor Repair

Repair of a dead Dell S2409Wb monitor by replacing the Video board and changing two backlights.

https://drive.google.com/file/d/0B43XXiSt0MIdS3BkYWk2VXI4Uk0/view?usp=sharing

Writing windows desktop programs to work with TI Bluetooth Low Energy Sensortag via a CSR 4.0 dongle

Quick write-up on how to do this...

https://drive.google.com/file/d/0B43XXiSt0MIdS3NoWnBMdlBDOFE/view?usp=sharing

B&Q Everflourish EMT757 Timer Schematic Notes

I was considering modifying this timer to accept a control signal from an external source to override the relay, switching it on.  I concluded this was too fiddly due to the power supply not being isolated.

The schematic is recorded here in case anyone else finds it useful in their experiments or fault finding. 

https://drive.google.com/file/d/0B43XXiSt0MIdem9TcjBDNUNhcnM/edit?usp=sharing

Dettol Soap Dispenser Repair

The following describes the "repair" of a Dettol no-touch soap dispenser, which was producing too much soap then flashing the red light.

https://docs.google.com/file/d/0B43XXiSt0MIdTFZGS0hqc3J6QWs/edit?usp=sharing

The root cause is that the design is not tolerant to the high voltage provided by good quality fresh batteries.  A diode was inserted in the circuit to ensure it works with fresh batteries.

Disassembled Dettol Soap Dispenser showing PCB

TomTom Go 910 Repair

The following describes the repair of a TomTom Go 910 which had been overvoltaged (connected directly to 12V).

https://docs.google.com/file/d/0B43XXiSt0MIdcnJyQVJHQVM1YlE/edit?usp=sharing

The root cause of the failure was a break in the feedback conductor in the GPS power cable, which had caused the input voltage to rise above the absolute maximum of 6V, destroying 3 power supply components.

The design of the car power supply is poor in that a simple break in one of the cable conductors can cause a damaging voltage to be applied to the GPS.

The components have been replaced, and the GPS tested with a clean 5V supply.

The power supply was later repaired by shorting the red and white conductors at the power supply end of the cable.

Burned out components in TomTom Go 910