5pcs DIY LM317+LM337 Negative Dual Power Adjustable Kit Power Supply Module Board Component

Description FR 4 circuit plate board using military grade A material sheet plate and some stability tolerance parameters A material behaved very tough which is in the interests of a number of other relatively cheap price sheet PCB board parameter elements are printed directly without reference to a circuit diagram of the case can be soldered directly very convenient 1 The double sided wiring pads spray tin and tin increase Process pads can withstand repeatedly desoldering not easy to fall off Bending down refers to non human conditions caused 2 Since less likely to buckle poor plate will change with time and the environment arising from bending 3 Impedance more stable and reliable Recommendation input voltage rectified smoothed voltage means rather than an AC voltage AC input is rectified and filtered to 1 414 times if the input voltage of 12V AC is rectified and filtered after 12 1 414 16 968V at least higher than the output voltage is 3V but do not be too high too much pressure will only increase 317 337 power consumption the chip heat the output current can also be less for example as the input voltage is rectified and filtered voltage is 12V output regulation to 5V the regulator so that the pressure drop is above the chip 12 5 7V if the time currentIs 0 5A then the power regulator tube is 0 5 7 3 5W the greater the power the more severe heat Parameter Board size approximately length 62mm width 59mm high 30mmInput voltage AC 5