Humidity and Temperature Sensor

Posted by barnoid Sat, 18 Feb 2012 19:13:47 GMT

Humidity and Temperature Sensor
This is my Honeywell HIH-6130 breakout board populated with components. I tested it and it works perfectly. I only made one, this is a composite photo to show the front and back.
MakeCanon
ModelCanon EOS 5D Mark II
Exposure0.005 sec (1/200)
Aperturef/5.0
Exposure ProgramProgram AE
ISO Speed200
Date and Time (Original)2012:02:18 18:36:19
Exposure Bias0 EV
FlashOff, Did not fire
Focal Length105 mm
QualityRAW
Metering ModeEvaluative
Lens TypeCanon EF 24-105mm f/4L IS
Camera Temperature14 C

My First PCB

Posted by barnoid Sat, 18 Feb 2012 19:13:34 GMT

My First PCB
Actually my second, I didn’t realise until I was about to start soldering that the first was mirrored and so couldn’t work with the surface mount chip. It’s a breakout board for a Honeywell HIH-6130 humidity and temperature sensor. I designed the layout in Eagle, printed it out and transfered some toner onto the copper board by pressing the print against it and heating with an iron. This didn’t transfer enough toner though so I went over it with a pen.
MakeCanon
ModelCanon EOS 5D Mark II
Exposure0.008 sec (1/125)
Aperturef/4.0
Exposure ProgramProgram AE
ISO Speed200
Date and Time (Original)2012:02:18 16:08:47
Exposure Bias0 EV
FlashOff, Did not fire
Focal Length105 mm
QualityRAW
Metering ModeEvaluative
Lens TypeCanon EF 24-105mm f/4L IS
Camera Temperature14 C

Binary Clock - block diagram

Posted by barnoid Fri, 29 Dec 2006 19:06:09 GMT

Binary Clock - block diagram
I attempted to make a binary clock as a Christmas present for scribe. It uses 4000 series CMOS logic ICs. This is a block diagram. It has a quartz pulse circuit which is divided down from 32768Hz to 2Hz by the 4060. This then drives a 4024 7bit counter for seconds connected to a 4 input AND gate, half of a 4082, which in turn drives the clock input of another 4024 which counts minutes. A similar thing happens for minutes to hours. Blue circles in the diagram indicate where the blue LEDs and accompanying resistors attach. The diagram doesn’t show where the switches for setting the hours and minutes attach. This circuit works fine when assembled on breadboard, but for some reason I haven’t yet worked out it doesn’t work when soldered on stripboard.

Komodo 3 - inverter circuit

Posted by barnoid Thu, 03 May 2007 23:28:41 GMT

Komodo 3 - inverter circuit
The led on the motherboard’s built-in network interface is normally on and blinks off on activity, I want it the other way round. This is a simple transistor inverter circuit which controls the front mounted LED. Unfortunately the LED resistor is too small and so the LED is much too bright.
MakeCanon
ModelCanon EOS 300D DIGITAL
Exposure0.017 sec (1/60)
Aperturef/8
ISO Speed400
Date and Time (Original)2006:01:26 18:22:46
Exposure Bias-2 EV
Metering ModePattern
FlashFlash fired
Focal Length55 mm