Contents
How do you drive a solenoid?
The simplest way to drive a solenoid is to switch the current on and off. This is often done with a low-side MOSFET switch and current recirculation diode (Fig. 3). In this circuit, the current is limited only by the supply voltage and dc resistance of the solenoid.
Does a solenoid need a resistor?
The resistors, capacitor, and diode are unnecessary. The solenoid coil is rated for 24V, so it will operate at approximately that voltage with no additional resistors needed to drop voltage and/or limit current. The diode would typically be used to protect an active switching device from inductive kickback.
Are there any problems with the lipo battery?
Lithium polymer batteries, like most battery types, are complicated chemical and mechanical devices. They are awesome power sources for rc use but they are also fragile and prone to problems. Below I will attempt to cover, and offer advise on, many of the common problems that arise when buying, using and abusing lipos.
How do you charge a lipo with no balance cord?
Power up the charger and plug in the battery’s power plug. No balance cord for the first steps even if you are used to balance-charge the LiPo. 1. Change the charger to the NiMH program. Unplug balancing cord and switch to NiMH Charge program. 2. Be sure that you unplug the balance cord. 3. Enter a low A value, around half the battery capacity.
What should the cell voltage of a LiPo battery be?
The battery you receive should have all cells within say .03V of each other. A 3s pack should have cell voltages like 3.85V, 3.84V, 3.85V. If it instead has cell voltages like 3.85V, 3.84V, 3.74V, cell 3 has a flaw in it.
How to fix a lipo with a cell error?
The quick fix. Power up the charger and plug in the battery’s power plug. No balance cord for the first steps even if you are used to balance-charge the LiPo. 1. Change the charger to the NiMH program. Unplug balancing cord and switch to NiMH Charge program. 2. Be sure that you unplug the balance cord. 3.