HV High Voltage DC-DC Step Up Geiger Power Supply Module w/TTL Tube Signal

Description

Adjustable High Voltage Power Supply Module for Geiger Tube.
Compatible with 400V and 500V GM tubes.
Tube Geiger pulses are translated to TTL output signals that allows you to drive long probe cables without signal attenuation and without reducing HV performance.
This is unique module with low quiescent current, stable high voltage and buffered tube signal TTL output. The output pulse is 2.5us-5us duration.The module can be used for building high quality external cable probes for DIY Geiger Counters or for building portable DIY dosimeters, radiation detectors or monitoring projects. Please download user manual PDF for more technical details! The module is compatible with many Russian and American GM tubes, for example LND-7317, LND-7312, LND-7313, LND-7314, LND-712, SBM-20, Beta-1, Beta-2, SBM-19 and more. If you have particular tube you have doubt about working voltage compatibility just message me to ask.
In this eBay auction you get: 1 soldered HV module, see product picture.
Why I recommend this module for Geiger Probes:
While using external probe build with DIY Geiger kits you may notice that many DIY probe construction feed the tube with high voltage transferred over the cable. High voltage and signal path line becomes a very long conductor with parasitic capacitance and inductance that reduce HV performance and add signal attenuation at high speed counts. Because Geiger tube signals are very short and weak, and when the cable length is increased over one meter, you will notice that the counter starts read less CPM that you can get if you were connecting same tube with shorter wires. There is no difference on background radiation count, but significant problem if you start test your probe in high radiation area where CPM load increased over 30K.
"RH High Voltage Probe Driver" has output pin with GM tube
buffered TTL signal
that can be transferred over long probe cable
. The maximum cable length mostly depend on cable quality you use. Up to 3 meters of probe length you can use a standard stereo wire. For probes with cable length over 5 meters I would recommend to use high grade microphone cable with lowest DC resistance. Left+Right uses for VDD and TTL signal when GND have to be shield conductor of the cable.
The module do not have reverse polarity protection! Please put attention how you connect the battery.
We do not accept any claims caused by wrong polarity connection! See attached diagram for the module pinout.
However, the product has technical warranty and we can repair your unit if something fail during 6 months of usage. Feel free to ask me before purchase if you have any question of need technical advice later.
Technical specifications:
Adjustable High Voltage Output for 400V or 500V GM tube
Compatible with many popular GM Tubes
2.5uS - 5.0uS TTL output of GM pulses
Ability to drive long probe cable
Input supply voltage 3.0V-4.5V
Output current 100uA max. at 550V
Includes 4.7M load resistor on the PCB
Compatible with PIC / AVR / MSP / Arduino projects
Compatible with MyGeiger ver.2 DIY Geiger Kit
Physical dimensions: Diameter of the PCB is 53mm (LND-7317 size)
UPC Number: 635292807381
SKU: RH-K-GK-HV
HV converter of the module is very efficient on background. With background ambient radiation the current drawn is 200uA (0.20mA) at 400V settings and 300uA(0.30mA) at 520V settings. The maximum output current at 550V is 100uA. The input current depend on radiation or resistive load you apply to HV output, download user manual PDF to see the graphs. The converter works fine with multimeter load, so you can measure the high voltage output directly with regular 10M multimeter at
TP
pad on the PCB.The tube anode wire soldered to
HV
pad.
Load resistor
4.7M already installed on the PCB
.
The module is compatible with almost every 400V or 500V type Geiger tubes. The round shape of PCB allows you to glue it directly on the pancake LND-7317 metal back-side. The user manual PDF has example photos of the probe construction with LND tube and
Atomic.Dave
installation kit enclosure.
The HV Module PCB can be used not only for building external probes. You may have already guessed that it also can be used for building a simple radiation detector.
It require just several passive components to solder very basic detector
: neon bulb, 5M resistor and piezo disc.
Arduino UNO example code to catch GM pulses during 1 minute:
// Arduino UNO Example code to count GM pulses during one minute from the detector
// if the INT is floating you may need to add 1K resistor to pull down to GND the INT port
#include
unsigned long counts;            //variable for GM Tube events
unsigned long cpm;               //variable for CPM
unsigned long previousMillis;    //variable for time measurement
void tube_impulse(){             //procedure for capturing events from Geiger Kit
counts++;
}
void setup(){                                //setup procedure
counts = 0;
cpm = 0;
Serial.begin(9600);                        // start serial monitor
// uncommennt if you have time-out problem to connect with Radiation Logger
//  delay(2000);
//  Serial.write('0');                      // sending zero to avoid connection time out with radiation logger
//  delay(2000);
//  Serial.write('0');                      // sending zero to avoid connection time out with radiation logger
pinMode(2, INPUT);                         // set pin INT0 input for capturing GM Tube events
digitalWrite(2, LOW);                      // turn off internal pullup resistors, you may need to add 1K resistor to pull down to GND the INT port (if INT pin is floating)
//---------------------Allow external interrupts on INT0-----------------------------//
attachInterrupt(0, tube_impulse, RISING);  //define external interrupts low-high-low
//-----------------------------------------------------------------------------------//
}
void loop(){                                    //main cycle
unsigned long currentMillis = millis();
if(currentMillis - previousMillis > 60000){   // if 60 seconds are passed
previousMillis = currentMillis;
cpm = counts;
Serial.print(cpm);     // send cpm data to Radiation Logger
Serial.write(' ');     // send null character for "Radiation Logger" to separate next data, check your hardware for actual UART separate sing
counts = 0;
}
}
To our valued customers, please read purchase terms before you bid or buy!
We'll use the best shipping method availiable to your destination, however some areas and some countries now will take much longer to receive international mail. Please allow longer delivery time than usually and conact me prior buying if you want to change delivery method to DHL Express (recommended).
Packaging:
The product dispatched carefully packed into antistatic bag and sturdy carton box. We use only high quality and new packaging materials.
Technical issues and support:
If you purchase this item you are agree that you have skills and tools to perform required DIY soldering (or de-soldering) and you know how to connect additional external components or modules. All project components should be installed and soldered in proper polarity with proper connectors. Any hardware/software modifications
are not covered with warranty.
Please read carefully product title, description and include list. Any questions are welcome. If you received broken or defective parts please contact us first, because we can resolve this problem in best way.
Handling time:
up to 10 business days to process international orders required after receiving cleared payment. This does not include the number of business days the shipping service will take to deliver the item to you. We can upload a tracking number during handing time even before your package was transferred to logistic company for the delivery.
Shipping:
We dispatch your order during 3-10 business day and will upload a tracking number to eBay for USA buyers only. Take note, international shipping is more complicated and longer than domestic, that's why when you buy internationally it mean you are agree to wait for the package. For Economy International Delivery default stated time is 3-5 weeks. Some countries may take longer because of your country custom regulation rules or postal service. USA usually takes 2-5 weeks; Europe 1-5 weeks; Australia 2-5 weeks; Germany 3-5 weeks; Israel 3-7 days; Russian Federation 4-6 weeks; All other countries 3-5 weeks default delivery time.
Tracking:
If you not received your package during 30 days please contact us first with "Details about item" request and not with opening "non-receiving case" directly. Take note, we ship through state export account and not from post office branch. This is the reason why your package is trackable only after it was sent abroad from Israel export and not at the date of collecting or at the date we uploaded a tracking number. Online tracking system in Israel displays information with big delays, post website provide tracking info
for reference only several days after your item was sent abroad
! Please be patient for the delivery and contact us if you have additional questions about shipping.
Custom & Duty Fee:
All international buyers are responsible to cover any possible custom fee or import tax that maybe applied at his/her country. We are obligated by export law of Israel to declare an order price as it was stated in your PayPal bill. German buyers, please remember when you buy that in Germany import custom rules require you to pay fee. We are not accept any claim because of your country custom regulation rules / delays / fee! Please contact your local custom office for more details about custom process and import tax.
You are responsible for any VAT, tariff, duty, taxes, handling fees, brokerage charges, customs clearance charges, etc. required by your country for importing consumer goods! There is no way for RH Electronics (the shipper) to predict your country's customs/fee habits, so be prepared to pay full VAT on the fully declared value of your order as well as any customs fees your postal system may charge you! If you do not pay the required brokerage fees, VAT, tariff, duty, taxes, handling fees, customs clearance charges, etc - we cannot issue any refunds.
Our shipping system is completely automated, and we cannot falsify customs forms. The customs forms will describe the cost of your order and contents as “Education DIY Kit for soldering”. We cannot mark orders as "gift" or lower the values.
Returns:
Accepted if you not started to solder/use device. In original package, including all components. You'll need to cover return shipping cost.
Payment:
Paypal only for eBay purchases.
V.A.T.:
If you live in Israel please take note, all buyers with DELIVERY ADDRESS WITHIN ISRAEL HAVE TO PAY 17% VAT! Refusing to pay tax will force us to cancel the order. If you live in Israel and want to purchase our item on eBay please contact us first with "Shipping details" request and we'll send you eBay offer with adjusted shipping price and VAT included.
Thank you for your positive feedback!