PEMENOL 2 Pack Photosensitive Mobile Robot Electronic Soldering DIY Kits, Funny Firefly Flash Robot, Adults STEM Practice Science Project for Valentine's Day Gift College High School Education

If you want to be successful with this kit, you should have some experience with soldering. The kit itself is a pretty simple and robust design, and most of the circuit is for making the LED breathe effect. I must admit the creative "bug" PCB layout and breathing LED make this a pretty slick and cool kit! Just be aware you will be soldering in very close quarters, as the PCB is pretty small. The battery holder and motors require careful wire stripping. The motor wires look like 30ga, so it's easy to break them. After I built one I discovered one motor didn't work, but I didn't test it before installing it, so it's possible I damaged it. I'm going to swap in a motor from the 2nd kit. I tested the bug with a power supply, since all my CR2032 batteries were old and mostly dead. The bug does scoot around slowly on the one motor. The light on my cellphone works to activate the motor, but there is no way to adjust the sensitivity on the PCB. You will have to adjust the brightness of your light source and shroud around the LDR sensors. Kids (and adults) find this kit adorable! Sorry, no estimate on how long a 2032 battery will last. The instructions are provided via a QR code, which you scan with your phone, and the link takes you to the instructions.

Confusing directions and hard to assemble right, requiring trimming very thin wires. Also not very fun to play with once assembled. It just sits there vibrating one side or another, but does not move.

This is about the Photosensitive Mobile Robot Electronic Soldering DIY Kit.It is an cute little kit that could help a child develop a few skills like following instructions and soldering. It can take a bit of supervision, though. For instance, my daughter mixed up some transistors: there are two types and they look the same, you got to read the small prints.Reworking was beyond a kid's capabilities.This kit is pure assembly and does not involve creative skills, unless you break something or do something wrong and need to repair.The instructions are online and are clear.The main flaw I found is in step 17 (see picture) : they say the wires should be shortened to 5mm, but they are so thin that it is almost impossible to shorten them, strip them, without breaking over and over again, and ending up with at least one unusable motor.This is what happened to me, so I could only build one out of the two kits.I suggest to neglect this instruction and leave the wires longer, however when you stick them to the leg, try to respect an equal distance and close to the top of the legs.Once assembled correctly, it works.All it does is slowly turning toward the photo resistor that is exposed to a light source.This light source needs to be quite strong, like a powerful flash light, not too far.It is probably measuring the difference between the right and left sensors, so it is better to use in the dark.It needs to be set on a slick surface for the motion to happen via the vibrations.If your flash light is not aligned with any sensor, it does not move, and this is probably the main flaw of this design: it lacks a sensor on its back that detects any light around, stronger than the light in the sensors, so that it would then turn and align itself.So all you can do is flash the light in the sensors and move slowly as it moves along, slowly.You can play with the legs angle and see what works best: I found that quite straight is better, but either way the rotation is uncertain and often it is more drifting than turning.

We have to hold a bright flashlight directly in front of it for it to vibrate. tried adjusting, the potentiometer only controls the vibration, not the sensitivity.

These Funny Firefly Flash robots are a great way to wind down a busy day. PEMENOL provides very clear, full-color electronic instructions which detail component orientation, use cases, safety concerns, and function. Having two robots in the kit is a great way to bring others into the project and ensure that both are functioning perfectly.I like these sorts of kits because they're generally stress-free and have everything you need to. The PCB is excellently laid out, the parts are organized well, and finished products a fun to buzz around the table via flashlight.Where I found trouble was with identifying that the laser-cut leg piece has a film on both sides which should be peeled off before bending and adhering with tape. One should also be sure to have required supplies in place before beginning: Soldering iron, solder, protective eyewear, wirecutters, and some scissors.After building your robots, you'll find that these are just challenging enough to lead to other kits and that you'll have the skills you need to pursue them. Watch my video for more information!