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And make attention to change RX by Two pot 10 Kohm to calculate the values exactly for RX. maybe no see the program. Every type of LCD have values for RX
hi all
i need help,i Borrowed a friend my DP2 and back it not work,i fix it Now its work Only with Small coil 30cm 3.5ohm r6=620ohm r7=680 irf840 frr 300hz battry 12v 1.5ah
1×1m cat5 cable one turn 4.5ohm the red led shines and Response=10cm
i change the ne556-tl072-4066-hef5438-all diod-all-all Transistor
Check the two diode and the resistor connected in LF357
hi all
i need help,i Borrowed a friend my DP2 and back it not work,i fix it Now its work Only with Small coil 30cm 3.5ohm r6=620ohm r7=680 irf840 frr 300hz battry 12v 1.5ah
1×1m cat5 cable one turn 4.5ohm the red led shines and Response=10cm
i change the ne556-tl072-4066-hef5438-all diod-all-all Transistor
I have constructed my DP using this PCB which is from www.thunting.com website. I have soldered all the components on to the PCB with reference to the schematic. I wanted to tune the PR1 (pot) as guided in a persian blog by a person called Bhenam. But I am having a confusing situation when I do it.
I have taken a Piezo buzzer and connected its negative lead to the (-) of the battery and connected Positive of the battery to the Positive of PCB and then touched the positive of the buzzer to leg 9 of the 556 chip.. it gives a beep sound and then when i tried to tune the PR1 to set the frequency there was no much difference in sound. Since nothing was changing I wanted to check for shorts and touched the +ve of Piezo to the negative pad on the PCB (battery negative connection) then also the piezo continued to buzz... is it a normal behavior or am I doing something wrong? I checked the tracks for shorts on the back of the board and its absolutely clean. I will take some pictures of my board and put them here tomorrow so that someone could advise me if I did something wrong..
-Thanks in advance
-Ajay
Before you tune on the exact frequency try this..put PR1 in mid position,. or near to max position, connect coil and make a test with a coin and other metal and see what reaction on your DP if it is working..and nothings bad.. then tune it to frequency which best for (see schematic of KT315 for frequency details).
I have constructed my DP using this PCB which is from www.thunting.com website. I have soldered all the components on to the PCB with reference to the schematic. I wanted to tune the PR1 (pot) as guided in a persian blog by a person called Bhenam. But I am having a confusing situation when I do it.
I have taken a Piezo buzzer and connected its negative lead to the (-) of the battery and connected Positive of the battery to the Positive of PCB and then touched the positive of the buzzer to leg 9 of the 556 chip.. it gives a beep sound and then when i tried to tune the PR1 to set the frequency there was no much difference in sound. Since nothing was changing I wanted to check for shorts and touched the +ve of Piezo to the negative pad on the PCB (battery negative connection) then also the piezo continued to buzz... is it a normal behavior or am I doing something wrong? I checked the tracks for shorts on the back of the board and its absolutely clean. I will take some pictures of my board and put them here tomorrow so that someone could advise me if I did something wrong..
Mr KT315 and all gurus
please check this schematic and tell me it is correct for dp2,becuase it is very simplest to make dp2 and good guide.
mr liudengyuan look this :
http://felezyab.persianblog.ir/post/44/
Hello everyone, who put tr2.tr4.tr5 how these three signals controlled, talk about the principle of control, as well as how this feature works RESET, RESET can put big chic raised this circuit
hi Nicolas, must still say additionally... Deepers 10DD detector has discrimination ability. but it is NOT the discrimination on principle of 'Ferrous-Non-Ferrous'. it is discrimination 'small target - big target', some threshhold that you can control by a pot.
Hi Kt315
Yes my friend I understand you good and what you mean exactly
Look this for sample in rover deluxe >>>>>
And yet we are very far from the true discrimination
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