What is it? I designed this circuit originally with the intention of using it on a Raspberry Pi to allow a remote control to power the system and accessories on and off. It has since evolved into ...Read More…
I designed this circuit originally with the intention of using it on a Raspberry Pi to allow a remote control to power the system and accessories on and off. It has since evolved into a general purpose RF remote controlled DC power source. The remote v1.0 works with most single board computers, vintage game consoles, and many other applications as well.
With 4 buttons on the keychain remote control FOB, momentarily pressing "A" (or on-board button) will switch on a relay which turns on a 2.25A switching voltage regulator for powering up your project or system. When "A" is held for 3 seconds, the relay and regulator are powered down. This circuit provides 2 switched voltage outputs: regulated (5.5v, 3.3v, or 1.8v) and unregulated (input voltage.) Buttons "B" "C" and "D" have non-latching, active low, open drain outputs for wiring up additional remote controlled functions. To power the receiver circuit at all times, the Remote v1.0 incorporates a secondary, low current 5v regulator.
I wanted an easy way to add remote control functions to various projects I'm working on.
Adds convenient remote control to a variety of electronic projects and has a versatile design for many customization options.
Can be installed in most classic video game consoles to add remote controlled power and reset functions.
Can power the Raspberry Pi or similar micro computer while the B, C, and D button outputs can be connected to GPIO pins (with 10k pull-up resistors to 3.3v)
Texas Instruments PTH08080WAH voltage regulator module can be set to 5.0, 3.3, or 1.8 volts by installing correct resistor value. Up to 2.25A output can handle most single board computers.
Heavy duty relay with 5A rated contacts
Has 5.5 x 2.1mm power input jack, power on/off button, and power / standby LED indicators on a removable PCB extension. This portion can be cut off for minimum size and/or use of external components.
Assembled Receiver PCB Measurements: 2-11/16" x 1-3/4" x 9/16"
Remote v1.0 PCB
Keychain Remote Control w/ 4 Buttons
RF Receiver board
Various components for customization options and single board computer connection
Input voltage: 7.5 - 15.0 VDC (2.5A input supply recommended)
Switching voltage regulator output: 5.0, 3.3, or 1.8 volts
Remote Range: Approximately 100ft. (no obstructions)
Frequency: 315MHz (~250-450MHz)
3 Open Outputs: Non-latching, open drain, active-low
Optional Power Input Jack: 5.5mm x 2.1mm center positive
Transmitter has a 65mm telescoping antenna
Receiver requires a 9 inch long wire for the antenna
Transmitter FOB is powered by an included 12V camera battery
Address code is set using jumpers on both transmitter & the receiver board. Received signal causes "Valid ID" output on the receiver board and the corresponding data pin (B,C,or D) to go low. Output pins float when no remote button is pressed. Pull-up resistors may be required depending on application.
NOTE: Factory default is both FOB & Receiver Address Bits are Floating (F), So all receivers will respond to all FOBs. To set unique addresses, you jumper BOTH FOB & Receiver address pins with the SAME “1”, “0” & “F” combinations.
Thanks for looking!
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