Overall this ON delay relay circuit is a good value for the money. I ended up putting this circuit into a small plastic box and brought the wires in through little holes to prevent them from moving. For a completely stationary application, this might not be a problem, but if the attached wires are moved at all, there is a chance that they will come loose, even if the terminal screws are tightened fully. My only quibble with the quality of this device is the weakness of the external wire terminals to hold on to a wire under a fairly small amount of pulling force. The actual delay period is more like 40-50 seconds maximum, but it can be adjusted down to zero with the turn of a small potentiometer. The pair of LED's is a nice touch to indicate when power is applied to the device and then when the relay is energized after the delay period. Again, for the expert technician, these things could be dismissed, but the novice might be left confused. The video demonstration was fairly clear, but it contained extraneous wires leading to unknown devices off-screen. No instructions arrived with the shipment. For an experienced electronics person, this was made clear by the video, but for some who might be able to use this device but are less technically oriented, the description and video could have been a lot clearer. This little circuit should have been titled an "ON Delay relay" circuit. There is a small button at the other end of the electric display, which is used to set the alarm voltage of the electric display.Works just fine shipped without instructions and YouTube video contained extraneous information. If there is no response, plug the balanced charging plug upside down. Find many great new & used options and get the best deals for Lipo Battery Voltage Tester Volt Meter Monitor 1-8S w Low Voltage Alarm US Stock at the best. Can be used to check the battery voltage of Lithium batteries including Lipo, LiFe, Li-Ion, as well as NiMH and NiCd batteries. LiPo Buzzer Battery Voltage Indicator Volt Meter (Tester With Alarm) Voltage Detection Precision: +- 0.01v Unit Voltage Display Range: 0.5 4.5v Total. The electronic display will immediately make two beeps of BB, and the jump number will be displayed on the screen. Insert the white balanced charging plug of the battery along the left most pin of the display. Turn the display face up (digital display side). Display range of total voltage: 0.5V ~ 36V Group voltage display range: 0.5V ~ 4.5VĤ. When the voltage is lower than the set value, the buzzer will sound and the red LED light will flash when the setting value is 3.3V, press the key to change the voltage setting value and automatically save the user's current setting value.ģ. Whether in flight or idle state, the display can be inserted into the battery balance charging connector to understand the battery power status. It can let you know the working state of your battery anytime and anywhere, so that the battery will not be damaged by over discharge or overcharge. It supports reverse connection protection It can automatically detect the voltage and total voltage of each cell of lithium battery. The voltage display is used for 1s ~ 8s lithium battery detection. The SparkFun LiPo Fuel Gauge connects your battery to your project and uses a sophisticated algorithm to detect the relative state of charge and direct A/D.
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