2x FA902 WATER LEVEL INDICATOR 3 LEVEL FOR POOL TANK ELECTRONIC CIRCUI BOARD,ASS, US $15.00 – Picture 0

2x FA902 WATER LEVEL INDICATOR 3 LEVEL FOR POOL TANK ELECTRONIC CIRCUI BOARD,ASS, US $15.00 – Picture 1

2x FA902 WATER LEVEL INDICATOR 3 LEVEL FOR POOL TANK ELECTRONIC CIRCUI BOARD,ASS, US $15.00 – Picture 2

2x Fa902 Water Level Indicator 3 Level For Pool Tank Electronic Circui Board,ass

US $15.00

Bangkapi, BA, Thailand
Jun 9th

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2x FA902 WATER LEVEL INDICATOR 3 LEVEL FOR POOL TANK ELECTRONIC CIRCUIT BOARD, ASSEMBLED KIT (2 Pcs.) Here is an ideal project for students in areas of low rainfall, or away from town water supplies. This easily-constructed indicator shows three levels of water in a vessel or pool using red, amber and green LEDs. The FK902 demonstrates the principle of water conductivity and shows how, by using a High and Low probes and simple logic, 3 water levels may be displayed. Technical data - Power supply : 9VDC. - Electric current consumption : 25mA (max.) - IC board dimension : 1.24 in x 1.74 in. - Recommended housing : FB03 How does it work Connect 100-ohm R at point P to bear the positive current. Supposing the water level is at position 1, the current will flow passing the 100-ohm R, the water, R1 and enter leg B of TR1 and turn on LED1. If the water covers all three levels the current will flow from point P passing the water with a certain resistance, through R1, R2 and R3, and enter leg B of the three TRs, then the three LEDs simultaneously turn on. Circuit Assembly The assembly of components is shown in Fig. 2. For good looking and easy assembly, the shorter components should be first installed - starting with low resistant components and then the higher. An important thing is that diodes, electrolyte capacitors, and transistors shall be carefully assembled before mounting them onto their right anode/cathode of the IC board otherwise it might cause damage to the components or the circuit. Configuration of the anode and the cathode is shown in Fig 3. Use the soldering iron/gun not exceeding 40 watts and the solder of tin-lead 60:40 with flux within. Recheck the correctness of installation after soldering. In case of wrong position, just use lead absorber or lead extractor wire to avoid probable damage to the IC. Testing For contrast, connect three color-different electric wires to points P1, P2 and P3. Peel off just a little bit the tips of all unconnected wires. Put points P into a glass of water. Energize 9 VDC the circuit the three LEDs will not turn on. Dip the three wire tips into the water all the three LEDs will turn on. Application Install the circuit at the points to measure water levels, such as in a water tank. Position 1, lay the wire almost reaching the bottom of the tank; position 2 at mid-height of the tank; and position 3 near to the top of the tank. If the three LEDs turn on it means that the tank is full; if two LEDs turn on the storage is over a half; if only one LED turns on the storage is less than a half; and if all LEDs turn off the tank is empty. In case additional indicators are required, such as six positions, another circuit should be added by connecting both points P to each other at a point a bit above the tank bottom. The first PCB is for positions 1, 2 and 3, respectively; and the second PCB is for po- sition 4, 5 and 6, respectively. Follow this manner in case additional positions are required. Free Shipping Handling WORLDWIDE. The package will be shipped directly from Thailand via Economy/Standard Small package Airmail, and it will take about 11-23 Business Days (or about 2-5 Weeks) **Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. **Please check with your country’s customs office to determine what these additional costs will be prior to bidding / buying Return Policy 100% Satisfaction Guarantee: If you are not satisfied with the product you purchased for any reason, please contact us for a return instruction within 30 days Shipping Handling costs are not refundable. Return shipping cost will be paid by buyer. We accept ONLY PayPal for payment. Contact us Please contact us by eBay message only.

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	Future Kit
MPN	060815
Model	FA902
Country/Region of Manufacture	Thailand
UPC	Does not apply