I'm really new at this so I may not know all the terms at this point.
Please have patience as I'm learning.
I purchased a Tx and Rx from ebay that was just a plug and go(came with relays, chip all pre-assembled ready to go), cool... works great! But Rx needs 12V to operate a relay. It drained my batteries.
-I only wanted to control a small 3V motor (on or off), relay not needed.
-Wanted it silent, the relay clicked pretty loud - took it out
-wanted to go down to a lower voltage circuit (3x AAA batteries)
So I purchased another Tx and Rx from ebay
The transmitter is still using a 12V "23A" alkaline battery from initial unit.
See attached picture of the circuit for the Rx that I put together.
It works if I'm really close (2 - 3 feet). Can't get much range.
The unit used to work at almost a block away in the original state. Is this because I downsized the voltage of the Rx from 12V to 4.5V??
What can I do to increase the range.
If I put my multimeter between Ground and the lead before the 3.3K Resistor, I get a reading of 3.8V, if I walk away farther then 3 feet, the current drops down to 0.48V, so the motor sputters.
Any Ideas? Thank you so much for your help.
Phil
Please have patience as I'm learning.
I purchased a Tx and Rx from ebay that was just a plug and go(came with relays, chip all pre-assembled ready to go), cool... works great! But Rx needs 12V to operate a relay. It drained my batteries.
-I only wanted to control a small 3V motor (on or off), relay not needed.
-Wanted it silent, the relay clicked pretty loud - took it out
-wanted to go down to a lower voltage circuit (3x AAA batteries)
So I purchased another Tx and Rx from ebay
- Distance: 100M(330 feet)
- Type: RF radio
- Carrier freq. 315MHz
- Max data rate: 10KHz
- Power supply: 5V~6V
- Encoder/Decoder: No
- Output type: Square wave
- Size: 20mmx 18mm x 5mm (Tx)
- Size: 30mm x 20mm x 5mm (Rx)
The transmitter is still using a 12V "23A" alkaline battery from initial unit.
See attached picture of the circuit for the Rx that I put together.
It works if I'm really close (2 - 3 feet). Can't get much range.
The unit used to work at almost a block away in the original state. Is this because I downsized the voltage of the Rx from 12V to 4.5V??
What can I do to increase the range.
If I put my multimeter between Ground and the lead before the 3.3K Resistor, I get a reading of 3.8V, if I walk away farther then 3 feet, the current drops down to 0.48V, so the motor sputters.
Any Ideas? Thank you so much for your help.
Phil
