…be adjusted both the frequency and amplitude. The circuit uses IC LM101A, a general purpose operational amplifier (op-amp) and IC LM111, a high-speed voltage comparator device. This circuit provides sine…
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1.5V and 9V Battery Tester
Here is the circuit diagram of battery tester designed by Matthew B.. This circuit can be used to measure the 1.5V and 9V battery. The circuit is very-very simple and…
Jimi Hendrix Fuzz Face Pedal JH-2
The following diagram is the Jimi Hendrix Fuzz Face Pedal JH-2 circuit diagram. Schematic by Jim Dunlop Note: Q1 & Q2 are MPSA18 Demo sound of Jimi Hendrix Fuzz JH-2:…
Motion Filter Effect
…so much funk and soul can be squeezed into a tiny box. IC1 – 4136 Quad Op-amp IC2 – 4066 Quad Switch D1, D2 – 1N4148 or 1N914 Circuit Notes:…
Mesa Boogie Dual Rectifier
The following diagram is Mesa Boogie dual rectifier solo head schematic diagram. This is a tubed pre-amp and tubed amplifier designed and manufactured by Mesa Boogie. The following schematic is…
Automatic 9V Battery Charger
…Switch OFF the power and take away the connections you created to make the adjustment.Insert an amp-meter between the battery and also the output connection and again switch the power…
Easy FM Tracking Transmitter
This is an easy FM tracking transmitter circuit project :). The scheme designed by Tony van Roon, and here the FM transmitter tracker diagram: Components List: R1 = 10K C1…
Safe Constant Current Source
In the above circuit diagram, a CMOS operational amplifier (op-amp) controls the current via a P-Channel HEXFET power transistor (IRF9520) to maintain a constant voltage across R1. The current is…
5 Band Graphic Equaliser
This is the design diagram of 5 band graphic equaliser circuit build using operational amplifier chips, the NE5532 or LM833. The op-amp ICs is a good choice because of inexpensive…
Easy Build Motorcycle Alarm
…space inside to accommodate it. Fit a 1-amp in-line fuse as close as achievable to the power source. This is Extremely Crucial. The fuse is there to secure the wiring…