…way from the output signal of the TDA7021T. Download the TDA7021T datasheet include the schematic diagram how to make this circuit stereo. [wpdm_file id=55] FM Receiver with TDA7021T source: http://electroniccircuit-s.blogspot.com/2009/07/mini-fm-receiver-circuit.html…
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Safer Security System Alarm
…happens to contain the right combination of comparators and logic circuits to do what you need. Step 1 is to translate the loop resistance into a voltage; that”s done by…
6V to 12V DC to DC Voltage Converter
…volt to 12 volt DC with 1A maximum current. The IC is used as switcher device. Schematic diagram: Components and its usage: IC Switcher/regulator LM2577T-ADJ (Texas Instrument) R1 and R2…
PNP Boost for Positive Voltage Regulator
…linearly with the shaft angle; nevertheless, if the potentiometer wiper was to open the circuit, the output voltage would rise. Normally, for that reason, it’s more beneficial to provide R3…
DC Motor Controller using Transistor TIP31
This is a DC motor controller circuit, built using transistor TIP31 based on H-Bridge concept. The switch S1 and S2 are normally open , push to close, press button switches….
Electronic Door Lock Security Key
This is the circuit diagram electronic door lock security key system. It means that this security system circuit is the combination of pressed key itself (not the mechanical). The output…
Simple Battery Level Indicator
…indicator functionality is integrated with other functions, in this circuit just one single comparator IC (LM3914) does it all. The LM3914 utilizes 10 comparators, that are internally built in the…
Simple Traffic Light Controller
…composed of diodes D1 through D4, filtered by capacitor C1 and also regulated by IC 7805 (IC1). IC2 is wired as a multivibrator with ‘on’ and ‘off’ periods of about…
6V and 12V Car Battery Charger
…connection error [ERROR]. Closing switch S2 short the diode D2 [6.8V], now we can charge 6V battery. 6V and 12V Car Battery Charger Component List R1-11=1K ohm 0.5W 5% R2=22K…
2 x 3W Stereo Audio Amplifier with IC BA5406
…Audio Amplifier with IC BA5406 in PDF version: 3W Stereo Audio Amplifier 1 file(s) 21.24 KB Download Manual Download the BA5406 datasheet: BA5406 datasheet 1 file(s) 141.54 KB Download Datasheet…