Hi am building this circuit.
I am using a VS1838B Infrared Sensor. On the right is a BC327-25 PNP Transistor and on the left is a MAC97A6 Thyristor. It seems to work well upon first use. then when you turn the battery case off and then back on again the thyristor is still turned on. If I pull one of the wires out and then quickly push it back in it will work again with the IR remote turning on the light and it stays on. but when I turn the battery pack on and off to reset it the Thyristor it doesn’t reset or maybe the on off switch causes a spike or interference so it comes back on. Any suggestions on how to make it so the LED comes on when i put my remote control to it and then turns of and stays of when I turn the battery pack on and off.
I tried the resistor from Gate to Ground and that worked to prevent it from turning on whenever I switched the battery on and off however now it seems like it doesn’t have enough juice to turn the thyristor on. Any ideas? Any suggestion on better components or different Thyristor?
Thanks for the help!
Zyan Mayfield
Schematic
Hi
Sorry about not having an actual schematic. When I get back home I may convert the fritzing to a schematic. But no it’s not a large capacitor that has 3 pins, It is the IR Sensor. I’m trying to figure out where I would benefit to have resistors. Every where I have tried keeps it from turning on when the battery spikes through the on/off switch but doesn’t allow enough when using the remot to actually switch the thyristor.
Thanks,
Zyan
Thyristor
Thanks thats useful information. I didn’t know about Triac and SCR. I’m going to be getting some 2N5060 SCR Thyristors and trying it. Yah my IR Sensor is a 38khz IR Reciever. Any more advice other than trying an SCR Thyristor? My main goal is to make a robot then has wire remote can move around the room uses dpdt switches to switch pollarity on each motor and momentary button to go for each motor. I want to be able to drive it around the room and sense multiple things. When it senses IR the light will turn on and stay on. When it senses a dark room the light will turn on and stay on as well that way when they come back to the finish line it should have sensed these different things. It’s for a elementary robots class! Thanks for the help thus far! I Have everything working except the IR sensor.
Thanks,
Zyan
PS Here is the Data Sheets for future reference.
PNP Transistor - http://pdf1.alldatasheet.com/datasheet-pdf/view/50727/FAIRCHILD/BC32725.html
IR Reciever - http://www.hyzt.com/manager/upimg/200987165540.pdf (Sorry could only find it in chinese.)
Triac Thyristor - http://www.nxp.com/documents/data_sheet/MAC97A8_A6.pdf
SCR Thyristor - http://www.onsemi.com/pub_link/Collateral/2N5060-D.PDF
