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fish shocker
Hi,
Please don't do that! You'll kill all fishes from very litle one. This way you'll destroy all aqua reserves in you pool, river or whatever there. Please, be kind enough don't do and don't help the others to do that.
Thanks on behalf of litle fishes not killed!
Re: transformer 3000w
Hi,
It seems that the trans you want is not a standard one. You shoul make it youself from a welding trans, rewinding its secondaries. The calculation is simple: measure the voltage of existing secondary and count its windings (normaly few turns - in case of welding trans)
telecom & communication based projects
Hi,
What would you think about using power transmission line as data transmission line? This could be very big project (if thinking of ADSL on power line) or can be limited to data transmission for dual slope communication etc.
homemade semiconductor
Hi,
It's a godd question. Home made transistor is complicated. You need high vacuum system, what is expensive.
I've tried with home made diode for making simplest radio receiver on it. It worked well. Add some sulfur into molten lead, it will create PbS, the PbS is a...
Re: Ballast Circuit
Hi,
I don't know you are still interested or not, just post this file for you because I've lost the link to the original site. This is in Russian, but the schem is quite simple. If any question, just come back.
Hi misley!
1. Semicon sensor: use 2N2222 or other silicone transistor in metal case, shorting collector and base, using base-emitter junction. Feed the sensor with simple constant current suply on FET (2N4856 for example). The linearity is quite good as you see in the datasheet. Don't use diode...
humidity sensor thesis
Hi,
1. Light sensor: use transistor (2N2222 etc) with metal case, carefuly cut the top of the case, carefuly clean up the silicon grease (be careful, not to damage the wiring from the cristal to the output legs). The transistor can now work as phototransistor with enough...
Re: Determine R
Determination of R depends on the working condition of the transistor and the IR receiver:
R2: depends on Icmax, collector curent gain of the transistor. If the signal is digital, the transistor work in switching mode, you can take R2=5V/Icmax, for most low power transistors, it...
single rectangular pulse
Help!!!! Need simplest circuit giving single "clean" regtangular pulse of about 1 sec when AC power switched on, transformerless powered.:?:
application and working air flow detector
:cry:
Hi, what sensitivity u want? flow of 0.1 mm/h speed or 100km/s?
If speed is enough, use flag mechanism to toggle microswitch.
If hi sensitivity required, use 2 diaphragm, one can be waved (like door mechanism), put across the flow direction to...
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