[TANKS] Re: relay switching
Thank you all for your help, especially for posting diagrams, I`l order the parts and get learning. -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: relay switching
Are you looking to reverse with the relay? If so, you can wire two relays into an H-Bridge or get a dedicated reversing relay. The 3.7 control from the toy would drive transistors as in Franks diagram and these would feed 12v into the reversing relay coils. Here's a reversing relay for a winch. Replace the MOM toggle switch with two transistors that provide switched 12v to the relay. You would hook the drains of the transistors to the relay. [image: This Is How Easy It Is To Install This Relay For Permanent Magnet Motors.] On Friday, April 15, 2016 at 6:57:48 AM UTC-4, neroc1 wrote: > > Just thought Id say thanks to Steve and Frank , Steve I did as you said, > via the IBT-2 this tiny little toy now controls (not PWM) a thunking great > motor and has the ability to control 2 equally big additional motors, > Still need to test it with the 3.7v that came with the toy so I do not > need a 4.8v power supply just to power the IBT-2. > > I would still like to find a relay that has a coil operating at 3.7v that > actuates a 12v circuit, just for simplicity > > Neil > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] Re: relay switching
Not to nit-pick, but if you dont put a resistor on the base of that transistor the circuit may not work very long... (If you use a N-MOSFET you can get away with no resistor; plus you can drive larger loads without worrying about your transistor pulling more base current than your micro-controller can deliver) The resistor value is very easily calculated: R = (Vsignal - 0.7) / (Irelay_coil / beta) Then round up to the nearest standard value. Beta is typically 100 (dont use that value directly in AC stuff, DC use only) Isaac Goldman 514-233-4423 This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. On Fri, Apr 15, 2016 at 11:29 AM, Frank Pittelli wrote: > You probably won't find such a relay, but you can easily drive a 12v relay > coil from a 3.7v signal using a simple transistor, as shown in the attached > circuit. The specific transistor to be used depends on the max draw of the > relay coil, which is typically less than 1A for inexpensive 12V automotive > relays. The flyback diode shown in the circuit suppresses the > reverse-voltage electrical pulse generated by the relay coil when it is > deactivated. > > Best of all, transistors and diodes are cheap and they don't go boom if > you wire things wrong ... they just release some magic smoke. So, they are > perfect for teaching basic electronics and soldering. Add an inexpensive > indicator LED and resistor across the relay coil to add user feedback. > Replace the flyback diode by an LED (oriented opposite to the indicator > LED) and you can see the reverse-voltage electrical pulse when the relay > coil is deactivated. A perfect electro-mechanical project for beginners. > > On 4/15/2016 6:57 AM, 'neroc1' via R/C Tank Combat wrote: > >> I would still like to find a relay that has a coil operating at 3.7v >> that actuates a 12v circuit, just for simplicity >> > > -- > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to rctankcombat@googlegroups.com > To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com > Visit the group at http://groups.google.com/group/rctankcombat > > --- You received this message because you are subscribed to the Google > Groups "R/C Tank Combat" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to rctankcombat+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] Re: relay switching
You probably won't find such a relay, but you can easily drive a 12v relay coil from a 3.7v signal using a simple transistor, as shown in the attached circuit. The specific transistor to be used depends on the max draw of the relay coil, which is typically less than 1A for inexpensive 12V automotive relays. The flyback diode shown in the circuit suppresses the reverse-voltage electrical pulse generated by the relay coil when it is deactivated. Best of all, transistors and diodes are cheap and they don't go boom if you wire things wrong ... they just release some magic smoke. So, they are perfect for teaching basic electronics and soldering. Add an inexpensive indicator LED and resistor across the relay coil to add user feedback. Replace the flyback diode by an LED (oriented opposite to the indicator LED) and you can see the reverse-voltage electrical pulse when the relay coil is deactivated. A perfect electro-mechanical project for beginners. On 4/15/2016 6:57 AM, 'neroc1' via R/C Tank Combat wrote: I would still like to find a relay that has a coil operating at 3.7v that actuates a 12v circuit, just for simplicity -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: relay switching
Just thought Id say thanks to Steve and Frank , Steve I did as you said, via the IBT-2 this tiny little toy now controls (not PWM) a thunking great motor and has the ability to control 2 equally big additional motors, Still need to test it with the 3.7v that came with the toy so I do not need a 4.8v power supply just to power the IBT-2. I would still like to find a relay that has a coil operating at 3.7v that actuates a 12v circuit, just for simplicity Neil -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: relay switching
The motor wires are your PWM (pulse width modulation) fwd/rev signals so they get connected to the RPWM and LPWM pins on the IBT-2. You also need to provide 5V to the VCC, R_EN, and L_EN pins. Your 3.7V from the toy may suffice (if not, run the toy at 5V). Your larger motor and it's separate power supply get connected to the B+, B-, M+, and M- pins. Tie all the grounds together (the ground on the toy battery and the ground on the big motor battery). When testing, if the motor is jittery or only goes full speed in either direction, wire a small resistor between the two 3.7V PWM signal wires. These boards are pretty solid and have built in thermal cutouts. Just watch your battery polarity. ST On Monday, April 4, 2016 at 11:31:14 AM UTC-4, neroc1 wrote: > > Steve > I bought one of these drivers (took forever to get here) I dont know how > tough the IBT 2 is especially with an electronics dummy like me operating > it, > Power connections are simple enough B- , B+ ,M- ,M+ but do I simply > connect the wires that would normally go to the small motor (normally 3.7v) > on my toy to the VCC (pin 7) and GND (pin 8) ? > will if matter if I get them the wrong way round ? > I normally destroy items like this within 24 hours but for once Id like > not to. > > appreciate the help > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: relay switching
Steve I bought one of these drivers (took forever to get here) I dont know how tough the IBT 2 is especially with an electronics dummy like me operating it, Power connections are simple enough B- , B+ ,M- ,M+ but do I simply connect the wires that would normally go to the small motor (normally 3.7v) on my toy to the VCC (pin 7) and GND (pin 8) ? will if matter if I get them the wrong way round ? I normally destroy items like this within 24 hours but for once Id like not to. appreciate the help -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: relay switching
Thank you all for your reply on this matter, it has got more complicated than I had considered, i was hoping that there was a 12v relay that is triggered with 3-4v coil out there on the market. I successfully tested a separate small 3v motor off the electronics that come with this toy and that works 100% but linking a 12v relay and nothing happens. I think I`ll try it next with 6v relays that I have seen . I dont think this toy so sophisticated to have PWM ability. it was so cheap ( £40.00 for the pair ) that I thought it was worth a look. Thanks for everybody's input. Neil -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: relay switching
As Frank stated, you can use an H-Bridge module. I've used the IBT-2 to "up-amp" cheap ESC's with success. The modules can accept PWM or act as a simple reversing switch. http://www.hessmer.org/blog/2013/12/28/ibt-2-h-bridge-with-arduino/ On Wednesday, February 17, 2016 at 9:47:20 AM UTC-5, neroc1 wrote: > > I have bought a couple of cheep toy tanks, just out if curiosity really. > they have a 2.4 G TX that takes 2X AA`s and a small 3.7v lithium in the > tank. Im actually quite impressed with the range/control of the little > fellas. they have a run time of about 20-30 minutes then its a usb > re-charge. they even have a little sound board making tank noises, inc > cannon/ machine gun/ engine. > The only thing that lets these tanks down is the machanical build > quality.the tracks fall off all the time. > What I am wondering is if the electronics could be "up powered" to trigger > 12v relays, I have searched t`interweb for many hours never finding any > clue if a 12v relay can be triggered by a 3.7v source. > Does anybody know of such a relay or solution ? > Much appreciated > > Neil R > > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
