I got frustrated and decided to hook it up to a 15v supply and jump R3 with a clip-on soldering heat sink. 555`s smell great when you fry`em. I have about 9 more tries before I run out of parts, but for now I will seek help in the forums and stick to the simulator. The IR array is rated at 920+nm but I bought them from china and they have plenty o
Click here to download the full size of the above Circuit.
f visible light. I have been using a volt meter, and the array isn`t getting enough voltage, (. 5V out of the 2nd transistor) but just in case, I am using an IR sensitive camera as well. I am in a hurry and have to go to work now, but I will have more voltages later. I don`t quite remember them all. I think that pin three on the 555 the voltage was okay, but after R3 It had only. 5v and the transistors weren`t doing much. Could it be that my 48LED arrays are too power hungry or something I have looked up other examples of timing circuits with the 555 for the simulator I have (Yenka) and it seems that all of them have the controlling resistor where I have R2 and not R1, and what`s with the funny loop on R1 I know that to get a reading on the resistance, It`s the middle pin and one of the ends, but it seems to be completely bypassed when I have it all hooked up and there is no resistance between pin 3 and 1. BUT THE LIGHT SHOULD STILL COME ON RIGHT It only came on once on my first model, and stayed on. Maybe the timing was too slow but the potentiometer did nothing. Like I said, the simulator examples had the variable resistor in another spot. Thanks in advance for any advice. I am fairly new to this stuff. You should put the pot where R2 is. The 555 won`t like it if the pot is set to zero. The loop is hooking pin 1 to pin 2. I don`t know the spec on your LED, but they usually need something to limit the current. Maybe it is...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: