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Discussion Title Created date
Synchonous demodulation / phase detector for light sensor
Hi freaks, I have a IR reflected light sensor, an IR LED and a photo-transistor to which I'd like to add some modulation for ambient noise rejection. My first thought is to just...
Wednesday, 12 March 2014 - 15:54
Clever Switch Mode Circuits..
While looking for a shortcut in generating a high side NMOS gate supply, I came across this little gem. Not applicable to my task but still appreciable none the less. From here:...
Friday, 28 June 2013 - 00:28
Ranging Light Sensor Feedback Loop
I'm playing with a ranging light sensor where the lower leg of the divider resistance is provided by a logic level N MOSFET. The MOSFET gate is controlled by a filtered 13 bit PWM...
Thursday, 1 November 2012 - 23:23
Board to Board InterConnect...
Hi people, I'm looking for some advice on a low cost flexible or plug-able board to board interconnect in 1k to 2k quantity... I have two small PCBs at a distance of 5/8" (15....
Monday, 25 July 2011 - 19:59
Let's play "Name that Connector" !!!
As the title suggests, I'm looking for a name for the connectors found on the rfm12b and other devices... They are pcb connectors and they work as either smd or dip with pin...
Saturday, 23 April 2011 - 23:57
Wind turbine powered POV weather station... reading sht21...
Hi freaks... I've built a turbine using a stepper where the shaft is stationary and the body of the motor is attached to the blades. The idea is that it will be displaying the...
Tuesday, 27 July 2010 - 01:14
NFT moisture sensor / pump controller...
Hey ppl... I've built an NFT type hydroponic garden to grow tomatoes. 25 plants of various varieties. I'm currently working on the controller which will take into consideration a...
Sunday, 30 May 2010 - 18:57
Toroid Trafo adding windings/voltage...
Hey freaks... I've recently moved from Korea to Canada(home) and brought a few 220v items with me... Specifically my pc speakers which upon opening have a small E core trafo that...
Tuesday, 20 October 2009 - 17:10
Trail Camera Project...
Hey ppl... My father asked me to build him a trail/game/animal camera... So I will be posting the progress as it goes... I've done some searching and found a few sites with DIY...
Friday, 16 October 2009 - 16:54
AT86RF230 code examples....
Hi ppl... I've got the sample code from page two of this thread working... [url]https://www.avrfreaks.net/index.p... However, I'm having trouble porting the code from AVR2001:...
Wednesday, 20 May 2009 - 15:22
DC Servo Drive...
Hi freaks... I just finished a layout in eagle for a modified version of the ELMchan DC Servo drive... It's mostly SMD, the passives being 3216 size... The AVR is a MEGA 8 ... I...
Sunday, 26 April 2009 - 10:55
AT86RF230 ZigBee, SPI @5V ... Level shifting required??
Hi ppl.... I'm working on a board that will have a Mega128 and an AT86RF230... The AT86RF230 requires 3 volts, will be driven from the 3V3 output of an FTDI232RL... The Mega128...
Monday, 6 April 2009 - 02:22

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