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Capacitive Sense on motorized fader
The metal 'bar has capacitance with any other object around it. Your fingers have capacitance. A capacitor when used to be charge up to a trigger threshold voltage like in a...
Wednesday, 5 August 2015 - 02:45
Beginner LTspice questions?
As a side note' I was just running a buck converter simulation that was taking forever to finish. Turns out i never selected  a model for a PNP transistor i was using. Once a...
Thursday, 23 July 2015 - 07:26
5vdc in +/- 15vdc 'black box power modules -$4.15
I do have some cheap Ebay/Chinese adjustable switching boost converters that appear to work great, but there kinda bulky. I will have fun trying to filter power supplies with...
Thursday, 23 July 2015 - 02:07
Beginner LTspice questions?
Most automotive voltage regulators put out 13.8volts? to charge the 12v lead acid battery (really 12.6v as each cell is 2.1v). So with lead acid batteries i assume you need some...
Tuesday, 21 July 2015 - 06:43
Beginner LTspice questions?
Wouldn't 36v AC be around 50 volts filtered to DC once through a full wave rectifier?   36*1.414 = 50.904 Half wave rectification even less.   
Tuesday, 21 July 2015 - 00:18
Beginner LTspice questions?
Here is a buck converter using the IRF9640 stepping down a 10vdc power supply into a 10ohm load, 100uf filter cap and a 330uh inductor.   *Edit After brushing up on...
Sunday, 19 July 2015 - 03:57
Beginner LTspice questions?
I updated to the newest LTspice (version 4.23c) and made a simple circuit to test p-channel mosfet switching. It appears to now be working.   When zero volts are at the...
Sunday, 19 July 2015 - 03:21
Beginner LTspice questions?
The mosfet appears to be letting current through even when its switched off in simulation. I tried a varied duty cycle square wave into an r-c filter and i was able to get...
Sunday, 19 July 2015 - 01:57
Usart reading problems
The internal clock could very well not be running at 1MHz, it is not as accurate as a crystal oscillator/ external clock running from a crystal.  USART' sends and receives...
Saturday, 18 July 2015 - 11:18
Usart reading problems
Are you using an external crystal for the chip clock source?  
Saturday, 18 July 2015 - 08:12
Powering an Atmega 168 with a solar panel
Impressive, could use it in a power supply for a survivalists radio transmitter. 250mV starup, could really suck the remaining life out of 1.5v batteries.   
Friday, 10 July 2015 - 20:39
Powering an Atmega 168 with a solar panel
I would look at trying to use a boost converter circuit that works at the lowest input voltage you can find. Like how to get 5vdc out of a 1.5v battery to the likes. http://www....
Friday, 10 July 2015 - 02:51