Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Don't worry, op-amps are not exactly my forte either; give me a PIC any day :D :D
Unfortunately I don't have a schematic to post, but here goes: connect a resistor & the sensor in series between supply pos & neg. The node between sensor & resistor goes to inverting input of op-amp...
If you're measuring the water temp of the engine, you can use a bowl of water and a thermometer to measure the resistance of the sensor at different temperatures.
You can make a voltage divider with the sensor and a pot. Connect to an op-amp & use another pot in the feedback circuit to...
What do you want to do? Measure flow, level, pressure? From your description, it seems like you want to measure flow...
You can install a plate/spoon type device on a hinge that will mechanically move as soon as water moves past it. Just detect the movement of the device. Here's another...
The HT side just makes things easier. The signal wire is not electrically connected to the HT wire(I'm sure you gathered as much already).
The commercial karting tach's available use the same principle; it makes it easy to fit on any type engine without tapping into harnesses or knowing any...
This is yet another tachometer circuit :roll:
I'm using the LM2907N (14 pin; uncomitted tach inputs).
The signal is derived from a normal piece of panel wire cable-tied onto the spark plug lead on my kart engine. I get a very strong signal on the scope (I even tried it on my petrol trimmer...
On the digital rev counters used for racing karts, a wire is wound 2-3 times around the HT wire (the one going to the spark plug) to form a crude potential transformer. I suppose the signal is then amplified via an op-amp and fed to the micro.
RC servo's would do fine, as they're cheap and readily available. If you need to see the images on screen as the camera moves, you can slow the servo down by "stepping" successively in software untill the position is reached.
To implement the sync & signal pulses should be easy as normal RC...
I'm a RC pilot myself :) I think you'll need some sort of combo between radio control and computer control ie the servo's are connected to the onboard computer and to a RC receiver.
Do a search on "Chris Good; UAV project". He has done a flying wing with ducted fans and a 3 metre wing span...
I would use the small board PC with a webcam and a wireless LAN setup. Use a laptop to connect to the smallboard PC; you can use something like VNC viewer,PC anywhere or the like to view what the smallboard PC "sees" through the webcam.
I'm using a video overlay unit (Xbob from Decade Engineering) together with a PIC 16F627,max232 chip & single channel remote gate TX/RX as a simple "on screen egg timer". The remote is just to activate the timer. The PIC is connected to the overlay unit via an rs232 connection and just sends the...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
