Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Bike alert light warns if someone drives too close

There is always a battle between bicycles and cars on the road. Bikes are great ecological transport but not all car drivers are likely to share their road with slower moving transport. But this isn’t about conflict. But rather how to make bike riders life easier. Hammock Boy found original solution. Instead using simple red light flasher he made more advanced warning system – Bright Bike. He took an Arduino board, mounted ultrasonic sensor to measure distance and surrounded it with bunch of bright LEDs. He put all this in a nice case and mounted on a rear of his bike. Device simply pings the distance from car behind and shines red LEDs. The closer car gets to bicycle the more bright LEDs become. This definitely should get some drivers attention. Continue reading

The Huge LED Display Ultrasonic Range Meter

Have you ever thought of building an ultrasonic range meter before? Oh, you think it’s hard to develop this tool, then you should spend a few minutes and read this on… Frankly, ultrasonic range meter is a PIC-based project, where the heart of this stuff is PIC16F873. The ultrasonic signal, where is always received with the reception sensor is amplified by 1,000 times of voltage with the operational amplifier with two stages. It is 100 times at the first stage and 10 times at the next stage! In general, the positive and negative power supply is being used for the operational amplifier, and the circuit will work with the single power supply of +9V. Some of the parts that needed to make this ultrasonic range meter are: Sturdy case: You can make the case with the acrylic board. Variable resistor: It used to revise the error of the display by the change of temperature. Knob: You have to put it on the variable resistor. Sound horn: It is for the decrease the ultrasonic that being reflected at the thing. AC… Continue reading