4/19/2023 0 Comments Pocket beagle![]() ![]() ![]() Their muzzle is a typical square shape for a Beagle, but it’s not as wide. They can weigh between 7 and 15 pounds and reach between 7 to 12 inches in height at the shoulder. Here’s everything you need to know about this affectionate, adorable and sometimes stubborn dog.Īlthough their size may vary, Pocket Beagles are generally half as big as a regular Beagle. Like any breed, these tiny Beagles have unique personalities and care requirements that owners need to be aware of. That doesn’t mean they’re the best dog for everyone though. They love their families and make great pets. After all, Beagles are adorable, so could you imagine how cute could a tiny version be? Pocket Beagles have a way of tugging at your heartstrings just by looking into those big, innocent eyes. You’re also not alone if you’re intrigued by this dog. You need to be careful orienting the ICs and the electrolytic capacitor.If you’ve never heard of a Pocket Beagle, you’re not alone, since they are quite a rare breed. Circuit Board Layoutīoard assembly is straight forward. Feel free to select a non-stacking header for the Beagle Bone Headers and to select either pin arrays or spring terminals for the T1, T2, T3, T4 and T5. The parts listed are for the stacking headers for the Beagle Bone Headers Headers, and screw terminals for the Motor terminals and the motor power terminals. The only parts that might be substituted are P8 and P9 (the Beagle Bone Headers), and T1 though T4 (the Motor terminals) and T5 (the 12 to 16 Volts terminals). The output of these flip-flops goes to a quartet of GPIO input pins. The other section is a quartet of flip-flop debounce circuits, one for each of two SPDT switch contacts that report the position of the turnout points. This means alternative states of the logic line will drive the stall motor in alternative directions. For any given logic state of the motor control output, one of the drivers is “on” and the other is “off”, thus one motor terminal is ground and one is raised to the 12V supply. The output are wired to the terminal block for a one of the motors. The inputs of both drivers are connected to one of the motor GPIO pins. Each chip has a non-inverting and an inverting driver. There is an output section that contains four TC4428 chips. It is enough to drive a pair of stall motors, wired in parallel as would be the case for a cross over.īecause this board is hardwired to use eight specific GPIO pins it is not possible to use two or more of these boards on given Beagle Bone. GPIO44: P2-24 Point Sense 4: return the state of the points for stall motor 4.Įach of the motor drive circuits is through a TC4428, which can drive up to 1.5A, which is way more needed to drive typical stall motor. GPIO47: P2-18 Point Sense 3: return the state of the points for stall motor 3. GPIO27: P2-19 Motor Select 4: select the position of stall motor 4. GPIO26: P1-34 Motor Select 3: select the position of stall motor 3. GPIO46: P2-22 Point Sense 2: return the state of the points for stall motor 2. GPIO45: P2-33 Point Sense 1: return the state of the points for stall motor 1. GPIO23: P2-3 Motor Select 2: select the position of stall motor 2. This board uses eight GPIO pins: GPIO20: P1-20 Motor Select 1: select the position of stall motor 1. GPIO Pins Used and stacking restrictions. The circuit board uses a pair of 46pin headers to connect to the pair of 46pin headers on the Beagle Bone Black and can use a stack-through header to allow additional boards to be stacked on top of it. It also has sense logic to return the state of the turnouts, using one pole of the DPDT contacts in the stall-motor (typical of Tortoise stall-motors). This is a circuit board to for an add-on board for a Pocket Beagle that will control four stall-motor turnout motors for a model railroad. ![]()
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