PCB Exposure Box with Countdown timer (ATMEGA8)
Posted on Aug 9, 2012
New Circuits
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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.....
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This design is based on one published by Milan Lulic in the German magazine elektroModell. Mr....
What makes this control unique is its momentum feature, which adds a degree of realism. The...
Charging any type of chargeable battery can be critical and involves some attention to be paid....
A continuity tester is handy for checking that there is an electrical conducting path between two...
This little circuit is invaluable for quick go/no-go testing of just about any remote control...
Nearly always when a remote control doesn`t work, the underlying problem is elementary: the unit...
UART, GPs This application note shows how to combine a GPs module SC16C2552B into a navigation...
This data sheet describes the evaluation board for the AD9834 direct digital synthesizer (DDS)....
Using the LA4440 audio amplifier IC can be designed a very simple stereo power audio amplifier...
A 1995 Ford Escort wagon with a 1. 9 litre engine and 5 speed manual trans. The problem I`m...
Designing and building an AM Broadcast Sucker-outer. The undesired AM broadcast signal is shunted...
Boosters are not buffers! While it is possible to make a booster that also provides a buffering...
Take a V2-400 and use the sub-woofer amplifier for the center channel. Then add a separate...
Nearly all the existing designs I found used direct switching of the lights (with no software...
20V child fS/iff power over a foreign vine wine Kiiit, bulb and plug Mount the bridge rectifier...
Circuit shown in Figure 3-97. The circuit only two contacts, the circuit is simple, but only...
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