FA408 VOICE ACTIVE SWITCH TIME DELAY turn on by human voice 12VDC. 60mA. (max.), US $15.49 – Picture 0

FA408 VOICE ACTIVE SWITCH TIME DELAY turn on by human voice 12VDC. 60mA. (max.), US $15.49 – Picture 1

Fa408 Voice Active Switch Time Delay Turn On By Human Voice 12vdc. 60ma. (max.)

US $15.49

Ship Worldwide, Thailand
Jan 29th

Open on mobile:
QR code

FA408 VOICE ACTIVE SWITCH This circuit is a circuit which use human voice to turn it on. The "on" duration can be adjusted between 1- 60 seconds. This voice activated timer can turn on any electrical appliance that use 220 volts of power supply. Technical data - Power supply : 12VDC. - Electric current consumption : 60mA. (max.) - Adj. sensitivity: trimmer potentiometer - Contact load : 5A@220VAC - IC board dimension : 2.49 in x 2.15 in Circuit performances This IC circuit utilizes a condenser MIC to work the reception function. When MIC anode receives a voice, it generates a signal frequency and transmits passed on C1 and R2 to pin 2 of IC1/1 to be amplified. Then the frequency is transmitted through pin 1 of IC1 to VR1 in order to be adjusted its level. After that the signal go out through the middle terminal of the VR1 to pin 5 of IC1/2 to compare the voltage. When there is more voltage at pin 5 than pin6, it results pin 7 to transmit the current to pin 12 of IC1/3 to compare with pin 13 of IC1/3. Since there is more voltage at the pin 12 than pin 13, it lets the voltage passed on pin 14 resulting LED1 to be lighted. The current is transmitted through R9 and D9 to C1. C1 is connected to the pin 10 of IC1 so the voltage is higher than pin 9. Then the high voltage passed on pin 8 to R13 and the base of TR1 resulting TR1 to work. The relay attracts the contact face to contact and LED will light on. When the sound is disappear, the voltage at pin 5 is lower than pin 6 so there is any voltage at pin 7, pin 12 and pin 14 resulting LED to be unlighted. The voltage at pin 10 transmitted from C4 is still present. Therefore TR1 functions and the relay works so LED2 remains lighted. C4 discharges the current passed on R11. Since pin 10 of IC1 is present with lower voltage than pin 9, there is any current at the base so TR1 does not function. At this stage the relay release the contact face and LED2 is unlighted. The VR2 at pin 9 is available for adjustment of voltage level setting the time from 1- 60 seconds ***Power supply not included in this package*** Shipping Handling WORLDWIDE. The package will be shipped directly from Thailand via Standard Small Package Airmail, and it will take about 11-23 business days. **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 I accept only Paypal for payment FreeAuctionDesigns Free eBay Templates, Image Hosting and Ad Design Tools!

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
Country/Region of Manufacture	Thailand
Model	FA408