Great workmanship very nice work handmade coin machine. There are video images, pictures and dimensions (pdf) about the construction of the coin machine from start to finish. A large part of the coin machine consists of plexiglass material, magnets are placed in order to detect counterfeit coins, and precautions are taken for small sized counterfeit coins 🙂
Coin Machine Project
source videorockola.com Coin Machine project files alternative link:
Hand-Made Coin Machine Mechanics Plexiglass Processing
Password: 320volt.com
Published: 2010/01/23 Tags: technical video
Quality Microphone, Guitar Preamplifier Circuits
Especially musicians, guitarist would work very preanf’s circuits and printed circuit board designs are quality tested.
Stereo Microphone Input with Equalizer Circuit Preamplifier
Preamf circuit design of very high quality two channel audio stereo input / output and microphone input, and volume control are also bölümleride ekolaz there. TL072 opamp tl071 and provided with the check of the circuit supply voltage provided by a 9-volt 300mA transformer