Can use 4 section 1.5 v batteries, several series diode give stc89c52rc MCU power supply voltage to 5 v to
CodePudding user response:
Can use the special power management chip
CodePudding user response:
Have ld0, better than diode
Diode can also, 89 c52 MCU should lower it can work normally
CodePudding user response:
According to the data sheet, stc89c52rc MCU operating voltage: 5.5 V to 3.8 V (5 V single chip microcomputer)/3.8 V ~ 2.4 V microcontroller (3 V), so the power supply can be 2 section 1.5 V battery microcontroller (3 V) or 3 section 1.5 V battery (5 V single chip microcomputer), but choose to less than or equal to 24 MHZ external crystals,
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refer to the original poster qq_41097962 response: 1.5 v battery can use 4 section, several series diode give stc89c52rc MCU power supply voltage to 5 v to you it is best to use a suitable step-down power supply switch power supply CodePudding user response:
According to the data sheet to check the working voltage, choose freescale battery voltage conversion, CodePudding user response:
Can also suggest use 18650 batteries, a section, the second section can also, 18650 to 5 v module is very good search, efficiency is also good, have good performance CodePudding user response:
Better with 18650 power batteries, the simple word ", can use DCDC efficiency CodePudding user response:
Still need to voltage stability CodePudding user response:
7805, simple and cheap, CodePudding user response:
18650 or smaller rc lithium battery, CodePudding user response:
Let's get a $18650, save trouble CodePudding user response:
With special power management chip, or the power supply module CodePudding user response:
Direct put on 18650 plus a power module is best CodePudding user response:
Two diode string is ok, or string of resistance and a zener diode can also CodePudding user response:
Recommended with 7805 voltage regulator module, battery rechargeable battery cost savings, CodePudding user response:
It is recommended to use 18650 lithium-ion batteries, and then step-down voltage regulator power supply chip CodePudding user response:
Choose according to pressure difference, it is recommended to use LM1117 5.0 voltage regulator to the microcontroller, CodePudding user response:
Do the car advice to use rechargeable batteries, just like 18650, 5 v is also easy to, baidu can find the corresponding circuit diagram CodePudding user response:
Do a power module CodePudding user response:
A power supply circuit CodePudding user response:
With a 18650 batteries, and then add a power supply module is ok CodePudding user response:
With "voltage regulator or 3 batteries with wide voltage of the MCU CodePudding user response:
Add a voltage regulator module with lithium batteries CodePudding user response:
refer to 17th floor weixin_44022874 response: choose according to pressure difference, it is recommended to use LM1117 5.0 voltage to the single-chip microcomputer, CodePudding user response:
Section 4 nimh batteries, just 5 v, no voltage regulator CodePudding user response:
Car, use rechargeable batteries, turn word still choose some voltage regulator, voltage power supply is stable, ripple can be reduced as required CodePudding user response:
You not only to consider step-down, must also consider voltage!!!!! I recently had a remote control car, and you are very similar, I was using a battery, four batteries, and then used a regulator tube, step-down to MCU power supply, motor and single chip microcomputer in parallel, but I there was a problem, a motor start, the microcontroller will be reset, then check found, motor starting moment, MCU power supply voltage dip, and then picks up, so this leads to a single chip microcomputer to restart, finally I think the reason is motor for electric, but hasn't turned up, motor when the equivalent resistance of the youngest, for they were not the conversion of kinetic energy, so lead to overall external load resistance decreases a lot, so the current, battery internal resistance accounted for most of the voltage, results in the decrease of MCU voltage instantaneous, the solution is simple, with a capacitance in circuit in parallel filter is ok, or there is a stupid way is to give a small resistance and motor series, which can reduce the current, but also can reduce the speed, CodePudding user response:
Under the car battery with "transformation CodePudding user response:
When doing the smart car, the power supply circuit is to focus on, or when doing SCM project associated with motor, power supply circuit is under quarantine, motor operation will produce very big circuit noise, we used to do intelligent car race, is done with 7805 chip voltage regulator, and then through the optical coupling isolation chip isolates motor circuit and MCU circuit, 