Hobby Electronics Basics

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Mobile to PIC TX/RX connection

With reference to this earlier post of mine, i was wanting to ask a quick question. I am in the final stages of my proj...
2 comments posted 19yrs
posted by wayne_tams
2 comments posted 19yrs posted by wayne_tams

H-bridge

hello, I am trying to design an H-bridge base on MOSFETS. My circuit under simulation was not working and founf this li...
2 comments posted 19yrs
posted by lerameur
2 comments posted 19yrs posted by lerameur

Is a useful UPS possible?

I keep noticing these phenomena at work: Version 1: We have stuff hooked to un-interruptible power supplies because it...
8 comments posted 19yrs
posted by tom.horsley
8 comments posted 19yrs posted by tom.horsley

diode basics

A diode allows current to flow from the anode to the cathode (but not vice-versa), correct? This picture is correct, rig...
14 comments posted 19yrs
posted by mrdarrett
14 comments posted 19yrs posted by mrdarrett

Rechargable battery power

Hi, I have connected 5 new NiMh batteries in series, each is rated at 3800 mAH. When I connect a 10W, 6v halogen bulb t...
3 comments posted 19yrs
posted by remcg
3 comments posted 19yrs posted by remcg

reduce jitter without PLL?

Hi, I am an electrical engineering student and I am interested in circuit design. Unfortunety I am not so familiar with...
3 comments posted 19yrs
posted by currypieker
3 comments posted 19yrs posted by currypieker

radio transmissions at the frequency of light

Hi all, just wanted to ask, what would be the problems that make it difficult/impossible to build a radio that transmit...
20 comments posted 19yrs
posted by j_joensuu
20 comments posted 19yrs posted by j_joensuu

DC power Jack - #2

Hi, I have this DC-Jack with three pins: Center pin, shunt terminal, and sleeve terminal. I don't know what each pin do...
0 comments posted 19yrs
posted by jidan1
0 comments posted 19yrs posted by jidan1

Using ferrites on thermocouples

I have incoming 8 type T thermocouples (they share a common constantan leg) and I wish to filter EMI noise coming from...
0 comments posted 19yrs
posted by none
0 comments posted 19yrs posted by none

Pic Question - digital output on

For the first time I am working on a USB project using a PIC18F4550 chip. I have written firmware for the chip that was...
0 comments posted 19yrs
posted by onlinefuel
0 comments posted 19yrs posted by onlinefuel

Ion Fan

Ion Fan I'm thinking of making an Ion Fan as described here http://www.inventgeek.com/Projects/IonCooler2/Overview.aspx...
4 comments posted 19yrs
posted by Stephen7372
4 comments posted 19yrs posted by Stephen7372

# of batteries to cause polarity reversal

If I have two NiMH batteries in series under a load, and one is weaker than the other, is it possible for the stronger o...
22 comments posted 19yrs
posted by mrdarrett
22 comments posted 19yrs posted by mrdarrett

DC power Jack - A basic Question

Hi, I am building a board where the power input can come from a battery or an adapter. So, I used a 3-polled DC jack an...
3 comments posted 19yrs
posted by jidan1
3 comments posted 19yrs posted by jidan1

Testing Battery Backup

Ice storm today with many outages and resultant surges. My security system console is showing a low battery indicator....
8 comments posted 19yrs
posted by gkamieneski
8 comments posted 19yrs posted by gkamieneski