Note: green with red is the same. 1A
Tips: You will need to purchase multiple products to your cart and submit the final confirmation, use the shopping cart once produced only .
1 kg received only the first heavy, such as overweight buyer shall fill continued heavy fee.
Use only produce a freight cart. No shopping cart to buy products very easy to make mistakes, we will close these orders, stop trading!
1 Since the variety and complexity of electronic components, labor costs are relatively high, but profits are low,
Therefore, each product requires a minimum purchase amount of 1 , we are upset, do please buyers understanding!
2 Our three express courier default STO rhyme through in SF need buyers can contact the customer to change price also express less contact customer service to modify.
3 Buyers photographed before 17:00 the same day the orders usually in the evening issued a unified, single order number will be uploaded in the day 22:00 to 11 o'clock, do not repeated reminders mind carefully shot!
4 Due to a wide range of electronic components, model and diverse wrong, more likely less, please check immediately after receipt of the box if all of no damage,
As if questions please contact customer service.
Note: Our commitment to order effective 7 days!
5 Component buy OUR goods must have knowledge and experience in the electronic shop without technical support, provide only partial information element Please consider the next single!
6 Shop Opening ordinary invoices to be reimbursed, shop goods prices are exclusive of tax, for invoicing need to contact customer service to additional tax point six percent
NOTE: We need to invoice orders of 200 or more out before, due to the limited number, please understand
7 We serve invoice receipt, invoice default only need a receipt, please leave a message or contact customer service notes!
8 Trouble you disposable disposable photographed and required to confirm the order. Please use the shopping cart when the variety, photographed after payment refusal to amend the Canadian list. Thanks for your cooperation!
3D printer reprap A4988 stepper motor driver pin soldered! Get fins! More cost-effective ~!
A4988 is a complete microstepping motor driver with built-in translator for easy operation. The product is available in full, half, 1 / 4,1 / 8 and sixteenth-step mode to operate bipolar stepper motor, the output drive capability of up to 35V and 1 A. A4988 includes a fixed off-time current regulator, the regulator can operate in Slow or Mixed decay modes. Converter is the key to the easy implementation of the A4988. Just enter a pulse step input, the micro-step drives the motor. There are no phase-sequence tables, high frequency control lines or complex interfaces to program. A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened.
In micro-step operation, the chopping control in the A4988 automatically selects the current decay mode Slow or Mixed . In mixed decay mode, the device is set initially to a fast decay in the inner portion fixed off-time, then slow decay for the remainder of downtime. Mixed current decay control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry provided to improve the pulse-width modulation (PWM) operation of power consumption. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection. No power-on sequencing.
A4988 surface mount QFN package (ES), size 5mm5mm, nominal overall package height of 0.90mm, with exposed pad for enhanced thermal dissipation. The package is Pb- Suffix T , With matte tin leadframe plating.
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